clockworkpi/WiringPi
1
0
Fork 0
mirror of https://github.com/clockworkpi/WiringPi.git synced 2025-12-13 00:08:51 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Initial Commit

Browse Source
This commit is contained in:
Gordon Henderson 2012-07-10 13:37:06 +01:00 committed by Philip Howard
commit 2c13e6148d
21 changed files with 3578 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
README Normal file
View File

@ -0,0 +1,7 @@
WiringPi: An implementation of most of the Arduino Wiring
functions for the Raspberry Pi
Full details at:
https://projects.drogon.net/raspberry-pi/wiringpi/

71
examples/Makefile Normal file
View File

@ -0,0 +1,71 @@
#
# Makefile:
# wiringPi - Wiring Compatable library for the Raspberry Pi
# https://projects.drogon.net/wiring-pi
#
# Copyright (c) 2012 Gordon Henderson
#################################################################################
# This file is part of wiringPi:
# Wiring Compatable library for the Raspberry Pi
#
# wiringPi is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# wiringPi is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
#################################################################################
#DEBUG = -g -O0
DEBUG = -O3
CC = gcc
INCLUDE = -I/usr/local/include
CFLAGS = $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
LDFLAGS = -L/usr/local/lib
LIBS = -lwiringPi
# Should not alter anything below this line
###############################################################################
SRC = test1.c test2.c speed.c
OBJ = test1.o test2.o speed.o
all: test1 test2 speed
test1: test1.o
@echo [link]
$(CC) -o $@ test1.o $(LDFLAGS) $(LIBS)
test2: test2.o
@echo [link]
$(CC) -o $@ test2.o $(LDFLAGS) $(LIBS)
speed: speed.o
@echo [link]
$(CC) -o $@ speed.o $(LDFLAGS) $(LIBS)
.c.o:
@echo [CC] $<
@$(CC) -c $(CFLAGS) $< -o $@
clean:
rm -f $(OBJ) *~ core tags test1 test2 speed
tags: $(SRC)
@echo [ctags]
@ctags $(SRC)
depend:
makedepend -Y $(SRC)
# DO NOT DELETE

103
examples/speed.c Normal file
View File

@ -0,0 +1,103 @@
/*
* speed.c:
* Simple program to measure the speed of the various GPIO
* access mechanisms.
*/
#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#define FAST_COUNT 10000000
#define SLOW_COUNT 1000000
int main (void)
{
int i ;
uint32_t start, end, count, sum, perSec ;
printf ("Raspberry Pi wiringPi speed test program\n") ;
// Start the standard way
if (wiringPiSetup () == -1)
exit (1) ;
printf ("Native wiringPi method: (%8d iterations)\n", FAST_COUNT) ;
pinMode (0, OUTPUT) ;
sum = 0 ;
for (i = 0 ; i < 3 ; ++i)
{
printf (" Pass: %d: ", i) ;
fflush (stdout) ;
start = millis () ;
for (count = 0 ; count < FAST_COUNT ; ++count)
digitalWrite (0, 1) ;
end = millis () ;
printf (" %8dmS\n", end - start) ;
sum += (end - start) ;
}
digitalWrite (0, 0) ;
printf (" Average: %8dmS", sum / 3) ;
perSec = (int)(double)FAST_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
printf (": %6d/sec\n", perSec) ;
printf ("Native GPIO method: (%8d iterations)\n", FAST_COUNT) ;
wiringPiGpioMode (WPI_MODE_GPIO) ;
pinMode (17, OUTPUT) ;
sum = 0 ;
for (i = 0 ; i < 3 ; ++i)
{
printf (" Pass: %d: ", i) ;
fflush (stdout) ;
start = millis () ;
for (count = 0 ; count < 10000000 ; ++count)
digitalWrite (17, 1) ;
end = millis () ;
printf (" %8dmS\n", end - start) ;
sum += (end - start) ;
}
digitalWrite (17, 0) ;
printf (" Average: %8dmS", sum / 3) ;
perSec = (int)(double)FAST_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
printf (": %6d/sec\n", perSec) ;
// Switch to SYS mode:
wiringPiSetupSys () ;
printf ("/sys/class/gpio method: (%8d iterations)\n", SLOW_COUNT) ;
sum = 0 ;
for (i = 0 ; i < 3 ; ++i)
{
printf (" Pass: %d: ", i) ;
fflush (stdout) ;
start = millis () ;
for (count = 0 ; count < SLOW_COUNT ; ++count)
digitalWrite (17, 1) ;
end = millis () ;
printf (" %8dmS\n", end - start) ;
sum += (end - start) ;
}
digitalWrite (17, 0) ;
printf (" Average: %8dmS", sum / 3) ;
perSec = (int)(double)SLOW_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
printf (": %6d/sec\n", perSec) ;
return 0 ;
}

BIN
examples/test1 Executable file
View File

Binary file not shown.

91
examples/test1.c Normal file
View File

@ -0,0 +1,91 @@
/*
* test1.c:
* Simple test program to test the wiringPi functions
*/
#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
// Simple sequencer data
// Triplets of LED, On/Off and delay
uint8_t data [] =
{
0, 1, 1,
1, 1, 1,
0, 0, 0, 2, 1, 1,
1, 0, 0, 3, 1, 1,
2, 0, 0, 4, 1, 1,
3, 0, 0, 5, 1, 1,
4, 0, 0, 6, 1, 1,
5, 0, 0, 7, 1, 1,
6, 0, 1,
7, 0, 1,
0, 0, 1, // Extra delay
// Back again
7, 1, 1,
6, 1, 1,
7, 0, 0, 5, 1, 1,
6, 0, 0, 4, 1, 1,
5, 0, 0, 3, 1, 1,
4, 0, 0, 2, 1, 1,
3, 0, 0, 1, 1, 1,
2, 0, 0, 0, 1, 1,
1, 0, 1,
0, 0, 1,
0, 0, 1, // Extra delay
9, 9, 9, // End marker
} ;
int main (void)
{
int pin ;
int dataPtr ;
int l, s, d ;
printf ("Raspberry Pi wiringPi test program\n") ;
if (wiringPiSetup () == -1)
exit (1) ;
for (pin = 0 ; pin < 8 ; ++pin)
pinMode (pin, OUTPUT) ;
pinMode (8, INPUT) ; // Pin 8 SDA0 - Has on-board 2k2 pull-up resistor
dataPtr = 0 ;
for (;;)
{
l = data [dataPtr++] ; // LED
s = data [dataPtr++] ; // State
d = data [dataPtr++] ; // Duration (10ths)
if ((l + s + d) == 27)
{
dataPtr = 0 ;
continue ;
}
digitalWrite (l, s) ;
if (digitalRead (8) == 0) // Pressed as our switch shorts to ground
delay (d * 10) ; // Faster!
else
delay (d * 100) ;
}
return 0 ;
}

BIN
examples/test2 Executable file
View File

Binary file not shown.

41
examples/test2.c Normal file
View File

@ -0,0 +1,41 @@
/*
* test2.c:
* Simple test program to test the wiringPi functions
* PWM test
*/
#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
int main (void)
{
int bright ;
printf ("Raspberry Pi wiringPi PWM test program\n") ;
if (wiringPiSetup () == -1)
exit (1) ;
pinMode (1, PWM_OUTPUT) ;
for (;;)
{
for (bright = 0 ; bright < 1024 ; ++bright)
{
pwmWrite (1, bright) ;
delay (1) ;
}
for (bright = 1023 ; bright >= 0 ; --bright)
{
pwmWrite (1, bright) ;
delay (1) ;
}
}
return 0 ;
}

674
gpio/COPYING Normal file
View File

@ -0,0 +1,674 @@
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The GNU General Public License is a free, copyleft license for
software and other kinds of works.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.
To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights. Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received. You must make sure that they, too, receive
or can get the source code. And you must show them these terms so they
know their rights.
Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.
For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software. For both users' and
authors' sake, the GPL requires that modified versions be marked as
changed, so that their problems will not be attributed erroneously to
authors of previous versions.
Some devices are designed to deny users access to install or run
modified versions of the software inside them, although the manufacturer
can do so. This is fundamentally incompatible with the aim of
protecting users' freedom to change the software. The systematic
pattern of such abuse occurs in the area of products for individuals to
use, which is precisely where it is most unacceptable. Therefore, we
have designed this version of the GPL to prohibit the practice for those
products. If such problems arise substantially in other domains, we
stand ready to extend this provision to those domains in future versions
of the GPL, as needed to protect the freedom of users.
Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
software on general-purpose computers, but in those that do, we wish to
avoid the special danger that patents applied to a free program could
make it effectively proprietary. To prevent this, the GPL assures that
patents cannot be used to render the program non-free.
The precise terms and conditions for copying, distribution and
modification follow.
TERMS AND CONDITIONS
0. Definitions.
"This License" refers to version 3 of the GNU General Public License.
"Copyright" also means copyright-like laws that apply to other kinds of
works, such as semiconductor masks.
"The Program" refers to any copyrightable work licensed under this
License. Each licensee is addressed as "you". "Licensees" and
"recipients" may be individuals or organizations.
To "modify" a work means to copy from or adapt all or part of the work
in a fashion requiring copyright permission, other than the making of an
exact copy. The resulting work is called a "modified version" of the
earlier work or a work "based on" the earlier work.
A "covered work" means either the unmodified Program or a work based
on the Program.
To "propagate" a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it on a
computer or modifying a private copy. Propagation includes copying,
distribution (with or without modification), making available to the
public, and in some countries other activities as well.
To "convey" a work means any kind of propagation that enables other
parties to make or receive copies. Mere interaction with a user through
a computer network, with no transfer of a copy, is not conveying.
An interactive user interface displays "Appropriate Legal Notices"
to the extent that it includes a convenient and prominently visible
feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to the
extent that warranties are provided), that licensees may convey the
work under this License, and how to view a copy of this License. If
the interface presents a list of user commands or options, such as a
menu, a prominent item in the list meets this criterion.
1. Source Code.
The "source code" for a work means the preferred form of the work
for making modifications to it. "Object code" means any non-source
form of a work.
A "Standard Interface" means an interface that either is an official
standard defined by a recognized standards body, or, in the case of
interfaces specified for a particular programming language, one that
is widely used among developers working in that language.
The "System Libraries" of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form of
packaging a Major Component, but which is not part of that Major
Component, and (b) serves only to enable use of the work with that
Major Component, or to implement a Standard Interface for which an
implementation is available to the public in source code form. A
"Major Component", in this context, means a major essential component
(kernel, window system, and so on) of the specific operating system
(if any) on which the executable work runs, or a compiler used to
produce the work, or an object code interpreter used to run it.
The "Corresponding Source" for a work in object code form means all
the source code needed to generate, install, and (for an executable
work) run the object code and to modify the work, including scripts to
control those activities. However, it does not include the work's
System Libraries, or general-purpose tools or generally available free
programs which are used unmodified in performing those activities but
which are not part of the work. For example, Corresponding Source
includes interface definition files associated with source files for
the work, and the source code for shared libraries and dynamically
linked subprograms that the work is specifically designed to require,
such as by intimate data communication or control flow between those
subprograms and other parts of the work.
The Corresponding Source need not include anything that users
can regenerate automatically from other parts of the Corresponding
Source.
The Corresponding Source for a work in source code form is that
same work.
2. Basic Permissions.
All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met. This License explicitly affirms your unlimited
permission to run the unmodified Program. The output from running a
covered work is covered by this License only if the output, given its
content, constitutes a covered work. This License acknowledges your
rights of fair use or other equivalent, as provided by copyright law.
You may make, run and propagate covered works that you do not
convey, without conditions so long as your license otherwise remains
in force. You may convey covered works to others for the sole purpose
of having them make modifications exclusively for you, or provide you
with facilities for running those works, provided that you comply with
the terms of this License in conveying all material for which you do
not control copyright. Those thus making or running the covered works
for you must do so exclusively on your behalf, under your direction
and control, on terms that prohibit them from making any copies of
your copyrighted material outside their relationship with you.
Conveying under any other circumstances is permitted solely under
the conditions stated below. Sublicensing is not allowed; section 10
makes it unnecessary.
3. Protecting Users' Legal Rights From Anti-Circumvention Law.
No covered work shall be deemed part of an effective technological
measure under any applicable law fulfilling obligations under article
11 of the WIPO copyright treaty adopted on 20 December 1996, or
similar laws prohibiting or restricting circumvention of such
measures.
When you convey a covered work, you waive any legal power to forbid
circumvention of technological measures to the extent such circumvention
is effected by exercising rights under this License with respect to
the covered work, and you disclaim any intention to limit operation or
modification of the work as a means of enforcing, against the work's
users, your or third parties' legal rights to forbid circumvention of
technological measures.
4. Conveying Verbatim Copies.
You may convey verbatim copies of the Program's source code as you
receive it, in any medium, provided that you conspicuously and
appropriately publish on each copy an appropriate copyright notice;
keep intact all notices stating that this License and any
non-permissive terms added in accord with section 7 apply to the code;
keep intact all notices of the absence of any warranty; and give all
recipients a copy of this License along with the Program.
You may charge any price or no price for each copy that you convey,
and you may offer support or warranty protection for a fee.
5. Conveying Modified Source Versions.
You may convey a work based on the Program, or the modifications to
produce it from the Program, in the form of source code under the
terms of section 4, provided that you also meet all of these conditions:
a) The work must carry prominent notices stating that you modified
it, and giving a relevant date.
b) The work must carry prominent notices stating that it is
released under this License and any conditions added under section
7. This requirement modifies the requirement in section 4 to
"keep intact all notices".
c) You must license the entire work, as a whole, under this
License to anyone who comes into possession of a copy. This
License will therefore apply, along with any applicable section 7
additional terms, to the whole of the work, and all its parts,
regardless of how they are packaged. This License gives no
permission to license the work in any other way, but it does not
invalidate such permission if you have separately received it.
d) If the work has interactive user interfaces, each must display
Appropriate Legal Notices; however, if the Program has interactive
interfaces that do not display Appropriate Legal Notices, your
work need not make them do so.
A compilation of a covered work with other separate and independent
works, which are not by their nature extensions of the covered work,
and which are not combined with it such as to form a larger program,
in or on a volume of a storage or distribution medium, is called an
"aggregate" if the compilation and its resulting copyright are not
used to limit the access or legal rights of the compilation's users
beyond what the individual works permit. Inclusion of a covered work
in an aggregate does not cause this License to apply to the other
parts of the aggregate.
6. Conveying Non-Source Forms.
You may convey a covered work in object code form under the terms
of sections 4 and 5, provided that you also convey the
machine-readable Corresponding Source under the terms of this License,
in one of these ways:
a) Convey the object code in, or embodied in, a physical product
(including a physical distribution medium), accompanied by the
Corresponding Source fixed on a durable physical medium
customarily used for software interchange.
b) Convey the object code in, or embodied in, a physical product
(including a physical distribution medium), accompanied by a
written offer, valid for at least three years and valid for as
long as you offer spare parts or customer support for that product
model, to give anyone who possesses the object code either (1) a
copy of the Corresponding Source for all the software in the
product that is covered by this License, on a durable physical
medium customarily used for software interchange, for a price no
more than your reasonable cost of physically performing this
conveying of source, or (2) access to copy the
Corresponding Source from a network server at no charge.
c) Convey individual copies of the object code with a copy of the
written offer to provide the Corresponding Source. This
alternative is allowed only occasionally and noncommercially, and
only if you received the object code with such an offer, in accord
with subsection 6b.
d) Convey the object code by offering access from a designated
place (gratis or for a charge), and offer equivalent access to the
Corresponding Source in the same way through the same place at no
further charge. You need not require recipients to copy the
Corresponding Source along with the object code. If the place to
copy the object code is a network server, the Corresponding Source
may be on a different server (operated by you or a third party)
that supports equivalent copying facilities, provided you maintain
clear directions next to the object code saying where to find the
Corresponding Source. Regardless of what server hosts the
Corresponding Source, you remain obligated to ensure that it is
available for as long as needed to satisfy these requirements.
e) Convey the object code using peer-to-peer transmission, provided
you inform other peers where the object code and Corresponding
Source of the work are being offered to the general public at no
charge under subsection 6d.
A separable portion of the object code, whose source code is excluded
from the Corresponding Source as a System Library, need not be
included in conveying the object code work.
A "User Product" is either (1) a "consumer product", which means any
tangible personal property which is normally used for personal, family,
or household purposes, or (2) anything designed or sold for incorporation
into a dwelling. In determining whether a product is a consumer product,
doubtful cases shall be resolved in favor of coverage. For a particular
product received by a particular user, "normally used" refers to a
typical or common use of that class of product, regardless of the status
of the particular user or of the way in which the particular user
actually uses, or expects or is expected to use, the product. A product
is a consumer product regardless of whether the product has substantial
commercial, industrial or non-consumer uses, unless such uses represent
the only significant mode of use of the product.
"Installation Information" for a User Product means any methods,
procedures, authorization keys, or other information required to install
and execute modified versions of a covered work in that User Product from
a modified version of its Corresponding Source. The information must
suffice to ensure that the continued functioning of the modified object
code is in no case prevented or interfered with solely because
modification has been made.
If you convey an object code work under this section in, or with, or
specifically for use in, a User Product, and the conveying occurs as
part of a transaction in which the right of possession and use of the
User Product is transferred to the recipient in perpetuity or for a
fixed term (regardless of how the transaction is characterized), the
Corresponding Source conveyed under this section must be accompanied
by the Installation Information. But this requirement does not apply
if neither you nor any third party retains the ability to install
modified object code on the User Product (for example, the work has
been installed in ROM).
The requirement to provide Installation Information does not include a
requirement to continue to provide support service, warranty, or updates
for a work that has been modified or installed by the recipient, or for
the User Product in which it has been modified or installed. Access to a
network may be denied when the modification itself materially and
adversely affects the operation of the network or violates the rules and
protocols for communication across the network.
Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
documented (and with an implementation available to the public in
source code form), and must require no special password or key for
unpacking, reading or copying.
7. Additional Terms.
"Additional permissions" are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law. If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.
When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
it. (Additional permissions may be written to require their own
removal in certain cases when you modify the work.) You may place
additional permissions on material, added by you to a covered work,
for which you have or can give appropriate copyright permission.
Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders of
that material) supplement the terms of this License with terms:
a) Disclaiming warranty or limiting liability differently from the
terms of sections 15 and 16 of this License; or
b) Requiring preservation of specified reasonable legal notices or
author attributions in that material or in the Appropriate Legal
Notices displayed by works containing it; or
c) Prohibiting misrepresentation of the origin of that material, or
requiring that modified versions of such material be marked in
reasonable ways as different from the original version; or
d) Limiting the use for publicity purposes of names of licensors or
authors of the material; or
e) Declining to grant rights under trademark law for use of some
trade names, trademarks, or service marks; or
f) Requiring indemnification of licensors and authors of that
material by anyone who conveys the material (or modified versions of
it) with contractual assumptions of liability to the recipient, for
any liability that these contractual assumptions directly impose on
those licensors and authors.
All other non-permissive additional terms are considered "further
restrictions" within the meaning of section 10. If the Program as you
received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further
restriction, you may remove that term. If a license document contains
a further restriction but permits relicensing or conveying under this
License, you may add to a covered work material governed by the terms
of that license document, provided that the further restriction does
not survive such relicensing or conveying.
If you add terms to a covered work in accord with this section, you
must place, in the relevant source files, a statement of the
additional terms that apply to those files, or a notice indicating
where to find the applicable terms.
Additional terms, permissive or non-permissive, may be stated in the
form of a separately written license, or stated as exceptions;
the above requirements apply either way.
8. Termination.
You may not propagate or modify a covered work except as expressly
provided under this License. Any attempt otherwise to propagate or
modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third
paragraph of section 11).
However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly and
finally terminates your license, and (b) permanently, if the copyright
holder fails to notify you of the violation by some reasonable means
prior to 60 days after the cessation.
Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
copyright holder, and you cure the violation prior to 30 days after
your receipt of the notice.
Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License. If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.
9. Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or
run a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance. However,
nothing other than this License grants you permission to propagate or
modify any covered work. These actions infringe copyright if you do
not accept this License. Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.
10. Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License. You are not responsible
for enforcing compliance by third parties with this License.
An "entity transaction" is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations. If propagation of a covered
work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.
You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License. For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.
11. Patents.
A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based. The
work thus licensed is called the contributor's "contributor version".
A contributor's "essential patent claims" are all patent claims
owned or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version. For
purposes of this definition, "control" includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.
Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
propagate the contents of its contributor version.
In the following three paragraphs, a "patent license" is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement). To "grant" such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.
If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients. "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License. You may not convey a covered
work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all. For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

73
gpio/Makefile Normal file
View File

@ -0,0 +1,73 @@
#
# Makefile:
# wiringPi - Wiring Compatable library for the Raspberry Pi
# https://projects.drogon.net/wiring-pi
#
# Copyright (c) 2012 Gordon Henderson
#################################################################################
# This file is part of wiringPi:
# Wiring Compatable library for the Raspberry Pi
#
# wiringPi is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# wiringPi is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
#################################################################################
#DEBUG = -g -O0
DEBUG = -O3
CC = gcc
INCLUDE = -I/usr/local/include
CFLAGS = $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
LDFLAGS = -L/usr/local/lib
LIBS = -lwiringPi
# Should not alter anything below this line
###############################################################################
SRC = gpio.c
OBJ = gpio.o
all: gpio
gpio: gpio.o
@echo [LD]
@$(CC) -o $@ gpio.o $(LDFLAGS) $(LIBS)
.c.o:
@echo [CC] $<
@$(CC) -c $(CFLAGS) $< -o $@
clean:
rm -f $(OBJ) gpio *~ core tags
tags: $(SRC)
@echo [ctags]
@ctags $(SRC)
depend:
makedepend -Y $(SRC)
install:
cp gpio /usr/local/bin
chown root.root /usr/local/bin/gpio
chmod 4755 /usr/local/bin/gpio
mkdir -p /usr/local/man/man1
cp gpio.1 /usr/local/man/man1
uninstall:
rm -f /usr/local/bin/gpio
rm -f /usr/local/man/man1/gpio.1
# DO NOT DELETE

145
gpio/gpio.1 Normal file
View File

@ -0,0 +1,145 @@
.TH "GPIO" "14 June 2012" "Command-Line access to Raspberry Pi GPIO"
.SH NAME
gpio \- Command-line access to Raspberry Pi GPIO
.SH SYNOPSIS
.B gpio
.RB [ \-g ]
.RB < read/write/pwm/mode ...>
.TP
.B gpio
.RB < export/unexport/exports ...>
.SH DESCRIPTION
.B GPIO
is a command line tool to allow the user easy access to the GPIO pins
on the Raspberry Pi. It's designed for simple testing and diagnostic
purposes, but can be used in shell scripts for general if somewhat slow
control of the GPIO pins.
Additionally, it can be used to set the exports in the /sys/class/gpio
system directory to allow subsequent programs to use the /sys/class/gpio
interface without needing to be run as root.
.SH OPTIONS
.TP
.B \-g
Use the BCM_GPIO pins numbers rather than WiringPi pin numbers.
.TP
.B read
Read the digital value of the given pin and print 0 or 1 to represent the
respective logic levels.
.TP
.B write
Write the given value (0 or 1) to the pin.
.TP
.B pwm
Write a PWM value (0-1023) to the given pin.
.TP
.B mode
Set a pin into input, output or pwm mode. Can also use the literals up, down or tri
to set the internal pull-up, pull-down or tristate controls.
.TP
.B export
Export a GPIO pin in the /sys/class/gpio directory. Use like the mode command above
however only in and out are supported at this time.
Once a GPIO pin has been exported, the
.B gpio
program changes the ownership of the /sys/class/gpio/gpioX/value pseudo file to
that of the user running the
.B gpio
program. This means that you can have a small script of gpio exports to setup
the gpio pins as your program requires without the need to run anything as
root, or with the sudo command.
.TP
.B unexport
Un-Export a GPIO pin in the /sys/class/gpio directory.
.TP
.B exports
Print a list (if any) of all the exported GPIO pins and their current values.
.SH "WiringPi vs. GPIO Pin numbering"
.PP
.TS
r r l.
WiringPi GPIO Function
_
0 17
1 18 (PWM)
2 21
3 22
4 23
5 24
6 25
7 4
8 0 SDA0
9 1 SCL0
10 8 SPI CE0
11 7 SPI CE1
12 10 SPI MOSI
13 9 SPI MISO
14 11 SPI SCLK
15 14 TxD
16 15 RxD
.TE
.SH FILES
.TP 2.2i
.I gpio
executable
.SH EXAMPLES
.TP 2.2i
gpio mode 4 output # Set pin 4 to output
.PP
gpio -g mode 23 output # Set GPIO pin 23 to output (same as WiringPi pin 4)
.PP
gpio mode 1 pwm # Set pin 1 to PWM mode
.PP
gpio pwm 1 512 # Set pin 1 to PWM value 512 - half brightness
.PP
gpio export 17 out # Set GPIO Pin 17 to output
.PP
gpio export 0 in # Set GPIO Pin 0 (SDA0) to input.
.PP
gpio -g read 0 # Read GPIO Pin 0 (SDA0)
.SH "NOTES"
When using the export or unexport commands, the pin numbers are
.B always
native GPIO numbers and never wiringPi pin numbers.
.SH "SEE ALSO"
.LP
WiringPi's home page
.IP
https://projects.drogon.net/raspberry-pi/wiringpi/
.SH AUTHOR
Gordon Henderson
.SH "REPORTING BUGS"
Report bugs to <gordon@drogon.net>
.SH COPYRIGHT
Copyright (c) 2012 Gordon Henderson
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

418
gpio/gpio.c Normal file
View File

@ -0,0 +1,418 @@
/*
* gpio.c:
* Set-UID command-line interface to the Raspberry Pi's GPIO
* Copyright (c) 2012 Gordon Henderson
***********************************************************************
* This file is part of wiringPi:
* https://projects.drogon.net/raspberry-pi/wiringpi/
*
* wiringPi is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* wiringPi is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************
*/
#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
//#include <sys/stat.h>
#include <fcntl.h>
static int wpMode ;
char *usage = "Usage: gpio [-g] <read/write/pwm/mode/export/unexport/exports> ..." ;
/*
* doExports:
* List all GPIO exports
*********************************************************************************
*/
void doExports (void)
{
int fd ;
int i, l, first ;
char fName [128] ;
char dir, val ;
// Rather crude, but who knows what others are up to...
for (first = 0, i = 0 ; i < 64 ; ++i)
{
// Try to read the direction
sprintf (fName, "/sys/class/gpio/gpio%d/direction", i) ;
if ((fd = open (fName, O_RDONLY)) == -1)
continue ;
if (first == 0)
{
++first ;
printf ("GPIO Pins exported:\n") ;
}
printf ("%4d: ", i) ;
if ((l = read (fd, &dir, 1)) == 0)
{
printf ("Empty direction file (why?)\n") ;
close (fd) ;
continue ;
}
/**/ if (dir == 'o')
printf ("Output ") ;
else if (dir == 'i')
printf ("Input ") ;
else
printf ("Wrong ") ;
close (fd) ;
// Try to Read the value
sprintf (fName, "/sys/class/gpio/gpio%d/value", i) ;
if ((fd = open (fName, O_RDONLY)) == -1)
{
printf ("No Value file (huh?)\n") ;
continue ;
}
if ((l = read (fd, &val, 1)) == 0)
{
printf ("Empty Value file (why?)\n") ;
close (fd) ;
continue ;
}
/**/ if (val == '0' )
printf ("(0)\n") ;
else if (val == '1')
printf ("(1)\n") ;
else
printf ("(?)\n") ;
close (fd) ;
}
}
/*
* doExport:
* gpio export pin mode
* This uses the /sys/class/gpio device interface.
*********************************************************************************
*/
void doExport (int argc, char *argv [])
{
FILE *fd ;
int pin ;
char *mode ;
char fName [128] ;
uid_t uid ;
gid_t gid ;
if (argc != 4)
{
fprintf (stderr, "Usage: %s export pin mode\n", argv [0]) ;
exit (1) ;
}
pin = atoi (argv [2]) ;
mode = argv [3] ;
if ((fd = fopen ("/sys/class/gpio/export", "w")) == NULL)
{
fprintf (stderr, "%s: Unable to open GPIO export interface: %s\n", argv [0], strerror (errno)) ;
exit (1) ;
}
fprintf (fd, "%d\n", pin) ;
fclose (fd) ;
sprintf (fName, "/sys/class/gpio/gpio%d/direction", pin) ;
if ((fd = fopen (fName, "w")) == NULL)
{
fprintf (stderr, "%s: Unable to open GPIO direction interface for pin %d: %s\n", argv [0], pin, strerror (errno)) ;
exit (1) ;
}
/**/ if (strcasecmp (mode, "in") == 0)
fprintf (fd, "in\n") ;
else if (strcasecmp (mode, "out") == 0)
fprintf (fd, "out\n") ;
else
{
fprintf (stderr, "%s: Invalid mode: %s. Should be in or out\n", argv [1], mode) ;
exit (1) ;
}
fclose (fd) ;
// Change ownership so the current user can actually use it!
uid = getuid () ;
gid = getgid () ;
sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ;
if (chown (fName, uid, gid) != 0)
{
fprintf (stderr, "%s: Unable to change ownership of the value file: %s\n", argv [1], strerror (errno)) ;
exit (1) ;
}
}
/*
* doUnexport:
* gpio unexport pin
* This uses the /sys/class/gpio device interface.
*********************************************************************************
*/
void doUnexport (int argc, char *argv [])
{
FILE *fd ;
int pin ;
if (argc != 3)
{
fprintf (stderr, "Usage: %s unexport pin\n", argv [0]) ;
exit (1) ;
}
pin = atoi (argv [2]) ;
if ((fd = fopen ("/sys/class/gpio/unexport", "w")) == NULL)
{
fprintf (stderr, "%s: Unable to open GPIO export interface\n", argv [0]) ;
exit (1) ;
}
fprintf (fd, "%d\n", pin) ;
fclose (fd) ;
}
/*
* doMode:
* gpio mode pin mode ...
*********************************************************************************
*/
void doMode (int argc, char *argv [])
{
int pin ;
char *mode ;
if (argc != 4)
{
fprintf (stderr, "Usage: %s mode pin mode\n", argv [0]) ;
exit (1) ;
}
pin = atoi (argv [2]) ;
if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
return ;
mode = argv [3] ;
/**/ if (strcasecmp (mode, "in") == 0)
pinMode (pin, INPUT) ;
else if (strcasecmp (mode, "out") == 0)
pinMode (pin, OUTPUT) ;
else if (strcasecmp (mode, "pwm") == 0)
pinMode (pin, PWM_OUTPUT) ;
else if (strcasecmp (mode, "up") == 0)
pullUpDnControl (pin, PUD_UP) ;
else if (strcasecmp (mode, "down") == 0)
pullUpDnControl (pin, PUD_DOWN) ;
else if (strcasecmp (mode, "tri") == 0)
pullUpDnControl (pin, PUD_OFF) ;
else
{
fprintf (stderr, "%s: Invalid mode: %s. Should be in/out/pwm/up/down/tri\n", argv [1], mode) ;
exit (1) ;
}
}
/*
* doWrite:
* gpio write pin value
*********************************************************************************
*/
void doWrite (int argc, char *argv [])
{
int pin, val ;
if (argc != 4)
{
fprintf (stderr, "Usage: %s write pin value\n", argv [0]) ;
exit (1) ;
}
pin = atoi (argv [2]) ;
if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
return ;
val = atoi (argv [3]) ;
/**/ if (val == 0)
digitalWrite (pin, LOW) ;
else
digitalWrite (pin, HIGH) ;
}
/*
* doRead:
* Read a pin and return the value
*********************************************************************************
*/
void doRead (int argc, char *argv [])
{
int pin, val ;
if (argc != 3)
{
fprintf (stderr, "Usage: %s read pin\n", argv [0]) ;
exit (1) ;
}
pin = atoi (argv [2]) ;
if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
{
printf ("0\n") ;
return ;
}
val = digitalRead (pin) ;
printf ("%s\n", val == 0 ? "0" : "1") ;
}
/*
* doPwm:
* Output a PWM value on a pin
*********************************************************************************
*/
void doPwm (int argc, char *argv [])
{
int pin, val ;
if (argc != 4)
{
fprintf (stderr, "Usage: %s pwm <pin> <value>\n", argv [0]) ;
exit (1) ;
}
pin = atoi (argv [2]) ;
if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
return ;
val = atoi (argv [3]) ;
pwmWrite (pin, val) ;
}
/*
* main:
* Start here
*********************************************************************************
*/
int main (int argc, char *argv [])
{
int i ;
if (argc == 1)
{
fprintf (stderr, "%s: %s\n", argv [0], usage) ;
return 1 ;
}
if (geteuid () != 0)
{
fprintf (stderr, "%s: Must be root to run\n", argv [0]) ;
return 1 ;
}
// Initial test for /sys/class/gpio operations:
/**/ if (strcasecmp (argv [1], "exports" ) == 0)
{ doExports () ; return 0 ; }
else if (strcasecmp (argv [1], "export" ) == 0)
{ doExport (argc, argv) ; return 0 ; }
else if (strcasecmp (argv [1], "unexport") == 0)
{ doUnexport (argc, argv) ; return 0 ; }
// Check for -g argument
if (strcasecmp (argv [1], "-g") == 0)
{
if (wiringPiSetupGpio () == -1)
{
fprintf (stderr, "%s: Unable to initialise GPIO in GPIO mode.\n", argv [0]) ;
exit (1) ;
}
for (i = 2 ; i < argc ; ++i)
argv [i - 1] = argv [i] ;
--argc ;
wpMode = WPI_MODE_GPIO ;
}
else
{
if (wiringPiSetup () == -1)
{
fprintf (stderr, "%s: Unable to initialise GPIO in wiringPi mode\n", argv [0]) ;
exit (1) ;
}
wpMode = WPI_MODE_PINS ;
}
/**/ if (strcasecmp (argv [1], "write" ) == 0)
doWrite (argc, argv) ;
else if (strcasecmp (argv [1], "read" ) == 0)
doRead (argc, argv) ;
else if (strcasecmp (argv [1], "mode" ) == 0)
doMode (argc, argv) ;
else if (strcasecmp (argv [1], "pwm" ) == 0)
doPwm (argc, argv) ;
else
{
fprintf (stderr, "%s: Unknown command: %s. (read/write/pwm/mode/export/unexport expected)\n", argv [0], argv [1]) ;
exit (1) ;
}
return 0 ;
}

23
gpio/test.sh Executable file
View File

@ -0,0 +1,23 @@
#!/bin/bash
# Simple test - assumes LEDs on Pins 0-7.
for i in `seq 0 7`;
do
gpio mode $i out
done
while true;
do
for i in `seq 0 7`;
do
gpio write $i 1
sleep 0.1
done
for i in `seq 0 7`;
do
gpio write $i 0
sleep 0.1
done
done

674
wiringPi/COPYING Normal file
View File

@ -0,0 +1,674 @@
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The GNU General Public License is a free, copyleft license for
software and other kinds of works.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.
To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights. Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received. You must make sure that they, too, receive
or can get the source code. And you must show them these terms so they
know their rights.
Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.
For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software. For both users' and
authors' sake, the GPL requires that modified versions be marked as
changed, so that their problems will not be attributed erroneously to
authors of previous versions.
Some devices are designed to deny users access to install or run
modified versions of the software inside them, although the manufacturer
can do so. This is fundamentally incompatible with the aim of
protecting users' freedom to change the software. The systematic
pattern of such abuse occurs in the area of products for individuals to
use, which is precisely where it is most unacceptable. Therefore, we
have designed this version of the GPL to prohibit the practice for those
products. If such problems arise substantially in other domains, we
stand ready to extend this provision to those domains in future versions
of the GPL, as needed to protect the freedom of users.
Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
software on general-purpose computers, but in those that do, we wish to
avoid the special danger that patents applied to a free program could
make it effectively proprietary. To prevent this, the GPL assures that
patents cannot be used to render the program non-free.
The precise terms and conditions for copying, distribution and
modification follow.
TERMS AND CONDITIONS
0. Definitions.
"This License" refers to version 3 of the GNU General Public License.
"Copyright" also means copyright-like laws that apply to other kinds of
works, such as semiconductor masks.
"The Program" refers to any copyrightable work licensed under this
License. Each licensee is addressed as "you". "Licensees" and
"recipients" may be individuals or organizations.
To "modify" a work means to copy from or adapt all or part of the work
in a fashion requiring copyright permission, other than the making of an
exact copy. The resulting work is called a "modified version" of the
earlier work or a work "based on" the earlier work.
A "covered work" means either the unmodified Program or a work based
on the Program.
To "propagate" a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it on a
computer or modifying a private copy. Propagation includes copying,
distribution (with or without modification), making available to the
public, and in some countries other activities as well.
To "convey" a work means any kind of propagation that enables other
parties to make or receive copies. Mere interaction with a user through
a computer network, with no transfer of a copy, is not conveying.
An interactive user interface displays "Appropriate Legal Notices"
to the extent that it includes a convenient and prominently visible
feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to the
extent that warranties are provided), that licensees may convey the
work under this License, and how to view a copy of this License. If
the interface presents a list of user commands or options, such as a
menu, a prominent item in the list meets this criterion.
1. Source Code.
The "source code" for a work means the preferred form of the work
for making modifications to it. "Object code" means any non-source
form of a work.
A "Standard Interface" means an interface that either is an official
standard defined by a recognized standards body, or, in the case of
interfaces specified for a particular programming language, one that
is widely used among developers working in that language.
The "System Libraries" of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form of
packaging a Major Component, but which is not part of that Major
Component, and (b) serves only to enable use of the work with that
Major Component, or to implement a Standard Interface for which an
implementation is available to the public in source code form. A
"Major Component", in this context, means a major essential component
(kernel, window system, and so on) of the specific operating system
(if any) on which the executable work runs, or a compiler used to
produce the work, or an object code interpreter used to run it.
The "Corresponding Source" for a work in object code form means all
the source code needed to generate, install, and (for an executable
work) run the object code and to modify the work, including scripts to
control those activities. However, it does not include the work's
System Libraries, or general-purpose tools or generally available free
programs which are used unmodified in performing those activities but
which are not part of the work. For example, Corresponding Source
includes interface definition files associated with source files for
the work, and the source code for shared libraries and dynamically
linked subprograms that the work is specifically designed to require,
such as by intimate data communication or control flow between those
subprograms and other parts of the work.
The Corresponding Source need not include anything that users
can regenerate automatically from other parts of the Corresponding
Source.
The Corresponding Source for a work in source code form is that
same work.
2. Basic Permissions.
All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met. This License explicitly affirms your unlimited
permission to run the unmodified Program. The output from running a
covered work is covered by this License only if the output, given its
content, constitutes a covered work. This License acknowledges your
rights of fair use or other equivalent, as provided by copyright law.
You may make, run and propagate covered works that you do not
convey, without conditions so long as your license otherwise remains
in force. You may convey covered works to others for the sole purpose
of having them make modifications exclusively for you, or provide you
with facilities for running those works, provided that you comply with
the terms of this License in conveying all material for which you do
not control copyright. Those thus making or running the covered works
for you must do so exclusively on your behalf, under your direction
and control, on terms that prohibit them from making any copies of
your copyrighted material outside their relationship with you.
Conveying under any other circumstances is permitted solely under
the conditions stated below. Sublicensing is not allowed; section 10
makes it unnecessary.
3. Protecting Users' Legal Rights From Anti-Circumvention Law.
No covered work shall be deemed part of an effective technological
measure under any applicable law fulfilling obligations under article
11 of the WIPO copyright treaty adopted on 20 December 1996, or
similar laws prohibiting or restricting circumvention of such
measures.
When you convey a covered work, you waive any legal power to forbid
circumvention of technological measures to the extent such circumvention
is effected by exercising rights under this License with respect to
the covered work, and you disclaim any intention to limit operation or
modification of the work as a means of enforcing, against the work's
users, your or third parties' legal rights to forbid circumvention of
technological measures.
4. Conveying Verbatim Copies.
You may convey verbatim copies of the Program's source code as you
receive it, in any medium, provided that you conspicuously and
appropriately publish on each copy an appropriate copyright notice;
keep intact all notices stating that this License and any
non-permissive terms added in accord with section 7 apply to the code;
keep intact all notices of the absence of any warranty; and give all
recipients a copy of this License along with the Program.
You may charge any price or no price for each copy that you convey,
and you may offer support or warranty protection for a fee.
5. Conveying Modified Source Versions.
You may convey a work based on the Program, or the modifications to
produce it from the Program, in the form of source code under the
terms of section 4, provided that you also meet all of these conditions:
a) The work must carry prominent notices stating that you modified
it, and giving a relevant date.
b) The work must carry prominent notices stating that it is
released under this License and any conditions added under section
7. This requirement modifies the requirement in section 4 to
"keep intact all notices".
c) You must license the entire work, as a whole, under this
License to anyone who comes into possession of a copy. This
License will therefore apply, along with any applicable section 7
additional terms, to the whole of the work, and all its parts,
regardless of how they are packaged. This License gives no
permission to license the work in any other way, but it does not
invalidate such permission if you have separately received it.
d) If the work has interactive user interfaces, each must display
Appropriate Legal Notices; however, if the Program has interactive
interfaces that do not display Appropriate Legal Notices, your
work need not make them do so.
A compilation of a covered work with other separate and independent
works, which are not by their nature extensions of the covered work,
and which are not combined with it such as to form a larger program,
in or on a volume of a storage or distribution medium, is called an
"aggregate" if the compilation and its resulting copyright are not
used to limit the access or legal rights of the compilation's users
beyond what the individual works permit. Inclusion of a covered work
in an aggregate does not cause this License to apply to the other
parts of the aggregate.
6. Conveying Non-Source Forms.
You may convey a covered work in object code form under the terms
of sections 4 and 5, provided that you also convey the
machine-readable Corresponding Source under the terms of this License,
in one of these ways:
a) Convey the object code in, or embodied in, a physical product
(including a physical distribution medium), accompanied by the
Corresponding Source fixed on a durable physical medium
customarily used for software interchange.
b) Convey the object code in, or embodied in, a physical product
(including a physical distribution medium), accompanied by a
written offer, valid for at least three years and valid for as
long as you offer spare parts or customer support for that product
model, to give anyone who possesses the object code either (1) a
copy of the Corresponding Source for all the software in the
product that is covered by this License, on a durable physical
medium customarily used for software interchange, for a price no
more than your reasonable cost of physically performing this
conveying of source, or (2) access to copy the
Corresponding Source from a network server at no charge.
c) Convey individual copies of the object code with a copy of the
written offer to provide the Corresponding Source. This
alternative is allowed only occasionally and noncommercially, and
only if you received the object code with such an offer, in accord
with subsection 6b.
d) Convey the object code by offering access from a designated
place (gratis or for a charge), and offer equivalent access to the
Corresponding Source in the same way through the same place at no
further charge. You need not require recipients to copy the
Corresponding Source along with the object code. If the place to
copy the object code is a network server, the Corresponding Source
may be on a different server (operated by you or a third party)
that supports equivalent copying facilities, provided you maintain
clear directions next to the object code saying where to find the
Corresponding Source. Regardless of what server hosts the
Corresponding Source, you remain obligated to ensure that it is
available for as long as needed to satisfy these requirements.
e) Convey the object code using peer-to-peer transmission, provided
you inform other peers where the object code and Corresponding
Source of the work are being offered to the general public at no
charge under subsection 6d.
A separable portion of the object code, whose source code is excluded
from the Corresponding Source as a System Library, need not be
included in conveying the object code work.
A "User Product" is either (1) a "consumer product", which means any
tangible personal property which is normally used for personal, family,
or household purposes, or (2) anything designed or sold for incorporation
into a dwelling. In determining whether a product is a consumer product,
doubtful cases shall be resolved in favor of coverage. For a particular
product received by a particular user, "normally used" refers to a
typical or common use of that class of product, regardless of the status
of the particular user or of the way in which the particular user
actually uses, or expects or is expected to use, the product. A product
is a consumer product regardless of whether the product has substantial
commercial, industrial or non-consumer uses, unless such uses represent
the only significant mode of use of the product.
"Installation Information" for a User Product means any methods,
procedures, authorization keys, or other information required to install
and execute modified versions of a covered work in that User Product from
a modified version of its Corresponding Source. The information must
suffice to ensure that the continued functioning of the modified object
code is in no case prevented or interfered with solely because
modification has been made.
If you convey an object code work under this section in, or with, or
specifically for use in, a User Product, and the conveying occurs as
part of a transaction in which the right of possession and use of the
User Product is transferred to the recipient in perpetuity or for a
fixed term (regardless of how the transaction is characterized), the
Corresponding Source conveyed under this section must be accompanied
by the Installation Information. But this requirement does not apply
if neither you nor any third party retains the ability to install
modified object code on the User Product (for example, the work has
been installed in ROM).
The requirement to provide Installation Information does not include a
requirement to continue to provide support service, warranty, or updates
for a work that has been modified or installed by the recipient, or for
the User Product in which it has been modified or installed. Access to a
network may be denied when the modification itself materially and
adversely affects the operation of the network or violates the rules and
protocols for communication across the network.
Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
documented (and with an implementation available to the public in
source code form), and must require no special password or key for
unpacking, reading or copying.
7. Additional Terms.
"Additional permissions" are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law. If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.
When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
it. (Additional permissions may be written to require their own
removal in certain cases when you modify the work.) You may place
additional permissions on material, added by you to a covered work,
for which you have or can give appropriate copyright permission.
Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders of
that material) supplement the terms of this License with terms:
a) Disclaiming warranty or limiting liability differently from the
terms of sections 15 and 16 of this License; or
b) Requiring preservation of specified reasonable legal notices or
author attributions in that material or in the Appropriate Legal
Notices displayed by works containing it; or
c) Prohibiting misrepresentation of the origin of that material, or
requiring that modified versions of such material be marked in
reasonable ways as different from the original version; or
d) Limiting the use for publicity purposes of names of licensors or
authors of the material; or
e) Declining to grant rights under trademark law for use of some
trade names, trademarks, or service marks; or
f) Requiring indemnification of licensors and authors of that
material by anyone who conveys the material (or modified versions of
it) with contractual assumptions of liability to the recipient, for
any liability that these contractual assumptions directly impose on
those licensors and authors.
All other non-permissive additional terms are considered "further
restrictions" within the meaning of section 10. If the Program as you
received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further
restriction, you may remove that term. If a license document contains
a further restriction but permits relicensing or conveying under this
License, you may add to a covered work material governed by the terms
of that license document, provided that the further restriction does
not survive such relicensing or conveying.
If you add terms to a covered work in accord with this section, you
must place, in the relevant source files, a statement of the
additional terms that apply to those files, or a notice indicating
where to find the applicable terms.
Additional terms, permissive or non-permissive, may be stated in the
form of a separately written license, or stated as exceptions;
the above requirements apply either way.
8. Termination.
You may not propagate or modify a covered work except as expressly
provided under this License. Any attempt otherwise to propagate or
modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third
paragraph of section 11).
However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly and
finally terminates your license, and (b) permanently, if the copyright
holder fails to notify you of the violation by some reasonable means
prior to 60 days after the cessation.
Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
copyright holder, and you cure the violation prior to 30 days after
your receipt of the notice.
Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License. If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.
9. Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or
run a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance. However,
nothing other than this License grants you permission to propagate or
modify any covered work. These actions infringe copyright if you do
not accept this License. Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.
10. Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License. You are not responsible
for enforcing compliance by third parties with this License.
An "entity transaction" is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations. If propagation of a covered
work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.
You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License. For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.
11. Patents.
A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based. The
work thus licensed is called the contributor's "contributor version".
A contributor's "essential patent claims" are all patent claims
owned or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version. For
purposes of this definition, "control" includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.
Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
propagate the contents of its contributor version.
In the following three paragraphs, a "patent license" is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement). To "grant" such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.
If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients. "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License. You may not convey a covered
work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all. For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

83
wiringPi/Makefile Normal file
View File

@ -0,0 +1,83 @@
#
# Makefile:
# wiringPi - Wiring Compatable library for the Raspberry Pi
#
# Copyright (c) 2012 Gordon Henderson
#################################################################################
# This file is part of wiringPi:
# https://projects.drogon.net/raspberry-pi/wiringpi/
#
# wiringPi is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# wiringPi is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
#################################################################################
TARGET=libwiringPi.a
#DEBUG = -g -O0
DEBUG = -O3
CC = gcc
INCLUDE = -I.
CFLAGS = $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
LIBS =
# Should not alter anything below this line
###############################################################################
SRC = wiringPi.c serial.c wiringShift.c
OBJ = wiringPi.o serial.o wiringShift.o
all: $(TARGET)
$(TARGET): $(OBJ)
@echo [AR] $(OBJ)
@ar rcs $(TARGET) $(OBJ)
@size $(TARGET)
.c.o:
@echo [CC] $<
@$(CC) -c $(CFLAGS) $< -o $@
clean:
rm -f $(OBJ) $(TARGET) *~ core tags Makefile.bak
tags: $(SRC)
@echo [ctags]
@ctags $(SRC)
depend:
makedepend -Y $(SRC)
install: $(TARGET)
@echo [install]
install -m 0755 -d /usr/local/lib
install -m 0755 -d /usr/local/include
install -m 0644 wiringPi.h /usr/local/include
install -m 0644 serial.h /usr/local/include
install -m 0644 wiringShift.h /usr/local/include
install -m 0644 libwiringPi.a /usr/local/lib
uninstall:
@echo [uninstall]
rm -f /usr/local/include/wiringPi.h
rm -f /usr/local/lib/libwiringPi.a
# DO NOT DELETE
wiringPi.o: wiringPi.h
serial.o: serial.h
wiringShift.o: wiringPi.h wiringShift.h

7
wiringPi/README Normal file
View File

@ -0,0 +1,7 @@
WiringPi: An implementation of most of the Arduino Wiring
functions for the Raspberry Pi
Full details at:
https://projects.drogon.net/raspberry-pi/wiringpi/

204
wiringPi/serial.c Normal file
View File

@ -0,0 +1,204 @@
/*
* serial.c:
* Handle a serial port
***********************************************************************
* This file is part of wiringPi:
* https://projects.drogon.net/raspberry-pi/wiringpi/
*
* wiringPi is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* wiringPi is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdarg.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "serial.h"
/*
* serialOpen:
* Open and initialise the serial port, setting all the right
* port parameters - or as many as are required - hopefully!
*********************************************************************************
*/
int serialOpen (char *device, int baud)
{
struct termios options ;
speed_t myBaud ;
int status, fd ;
#ifdef DEBUG
printf ("openSerialPort: <%s> baud: $d\n", device, baud) ;
#endif
switch (baud)
{
case 50: myBaud = B50 ; break ;
case 75: myBaud = B75 ; break ;
case 110: myBaud = B110 ; break ;
case 134: myBaud = B134 ; break ;
case 150: myBaud = B150 ; break ;
case 200: myBaud = B200 ; break ;
case 300: myBaud = B300 ; break ;
case 600: myBaud = B600 ; break ;
case 1200: myBaud = B1200 ; break ;
case 1800: myBaud = B1800 ; break ;
case 2400: myBaud = B2400 ; break ;
case 9600: myBaud = B9600 ; break ;
case 19200: myBaud = B19200 ; break ;
case 38400: myBaud = B38400 ; break ;
case 57600: myBaud = B57600 ; break ;
case 115200: myBaud = B115200 ; break ;
case 230400: myBaud = B230400 ; break ;
default:
return -2 ;
}
if ((fd = open (device, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK)) == -1)
return -1 ;
fcntl (fd, F_SETFL, O_RDWR) ;
// Get and modify current options:
tcgetattr (fd, &options) ;
cfmakeraw (&options) ;
cfsetispeed (&options, myBaud) ;
cfsetospeed (&options, myBaud) ;
options.c_cflag |= (CLOCAL | CREAD) ;
options.c_cflag &= ~PARENB ;
options.c_cflag &= ~CSTOPB ;
options.c_cflag &= ~CSIZE ;
options.c_cflag |= CS8 ;
options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG) ;
options.c_oflag &= ~OPOST ;
options.c_cc [VMIN] = 0 ;
options.c_cc [VTIME] = 100 ; // Ten seconds (100 deciseconds)
tcsetattr (fd, TCSANOW, &options) ;
ioctl (fd, TIOCMGET, &status);
status |= TIOCM_DTR ;
status |= TIOCM_RTS ;
ioctl (fd, TIOCMSET, &status);
usleep (10000) ; // 10mS
return fd ;
}
/*
* serialClose:
* Release the serial port
*********************************************************************************
*/
void serialClose (int fd)
{
close (fd) ;
}
/*
* serialPutchar:
* Send a single character to the serial port
*********************************************************************************
*/
void serialPutchar (int fd, uint8_t c)
{
write (fd, &c, 1) ;
}
/*
* serialPuts:
* Send a string to the serial port
*********************************************************************************
*/
void serialPuts (int fd, char *s)
{
write (fd, s, strlen (s)) ;
}
/*
* serialPrintf:
* Printf over Serial
*********************************************************************************
*/
void serialPrintf (int fd, char *message, ...)
{
va_list argp ;
char buffer [1024] ;
va_start (argp, message) ;
vsnprintf (buffer, 1023, message, argp) ;
va_end (argp) ;
serialPuts (fd, buffer) ;
}
/*
* serialDataAvail:
* Return the number of bytes of data avalable to be read in the serial port
*********************************************************************************
*/
int serialDataAvail (int fd)
{
int result ;
if (ioctl (fd, FIONREAD, &result) == -1)
return -1 ;
return result ;
}
/*
* serialGetchar:
* Get a single character from the serial device.
* Note: Zero is a valid character and this function will time-out after
* 10 seconds.
*********************************************************************************
*/
int serialGetchar (int fd)
{
uint8_t x ;
if (read (fd, &x, 1) != 1)
return -1 ;
return ((int)x) & 0xFF ;
}

41
wiringPi/serial.h Normal file
View File

@ -0,0 +1,41 @@
/*
* serial.h:
* Handle a serial port
***********************************************************************
* This file is part of wiringPi:
* https://projects.drogon.net/raspberry-pi/wiringpi/
*
* wiringPi is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* wiringPi is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************
*/
#ifndef _STDINT_H
# include <stdint.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
extern int serialOpen (char *device, int baud) ;
extern void serialClose (int fd) ;
extern void serialPutchar (int fd, uint8_t c) ;
extern void serialPuts (int fd, char *s) ;
extern void serialPrintf (int fd, char *message, ...) ;
extern int serialDataAvail (int fd) ;
extern int serialGetchar (int fd) ;
#ifdef __cplusplus
}
#endif

729
wiringPi/wiringPi.c Normal file
View File

@ -0,0 +1,729 @@
/*
* wiringPi:
* Arduino compatable (ish) Wiring library for the Raspberry Pi
* Copyright (c) 2012 Gordon Henderson
*
* Thanks to code samples from Gert Jan van Loo and the
* BCM2835 ARM Peripherals manual, however it's missing
* the clock section /grr/mutter/
***********************************************************************
* This file is part of wiringPi:
* https://projects.drogon.net/raspberry-pi/wiringpi/
*
* wiringPi is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* wiringPi is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************
*/
// Revisions:
// 2 Jul 2012:
// Fixed a few more bugs to do with range-checking when in GPIO mode.
// 11 Jun 2012:
// Fixed some typos.
// Added c++ support for the .h file
// Added a new function to allow for using my "pin" numbers, or native
// GPIO pin numbers.
// Removed my busy-loop delay and replaced it with a call to delayMicroseconds
//
// 02 May 2012:
// Added in the 2 UART pins
// Change maxPins to numPins to more accurately reflect purpose
// Pad drive current fiddling
#undef DEBUG_PADS
#include <stdio.h>
#include <stdint.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <time.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "wiringPi.h"
#ifndef TRUE
#define TRUE (1==1)
#define FALSE (1==2)
#endif
// Port function select bits
#define FSEL_INPT 0b000
#define FSEL_OUTP 0b001
#define FSEL_ALT0 0b100
#define FSEL_ALT0 0b100
#define FSEL_ALT1 0b101
#define FSEL_ALT2 0b110
#define FSEL_ALT3 0b111
#define FSEL_ALT4 0b011
#define FSEL_ALT5 0b010
// Access from ARM Running Linux
// Take from Gerts code. Some of this is not in the manual
// that I can find )-:
#define BCM2708_PERI_BASE 0x20000000
#define GPIO_PADS (BCM2708_PERI_BASE + 0x100000)
#define CLOCK_BASE (BCM2708_PERI_BASE + 0x101000)
#define GPIO_BASE (BCM2708_PERI_BASE + 0x200000)
#define GPIO_PWM (BCM2708_PERI_BASE + 0x20C000)
#define PAGE_SIZE (4*1024)
#define BLOCK_SIZE (4*1024)
// PWM
#define PWM_CONTROL 0
#define PWM_STATUS 1
#define PWM0_RANGE 4
#define PWM0_DATA 5
#define PWM1_RANGE 8
#define PWM1_DATA 9
#define PWMCLK_CNTL 40
#define PWMCLK_DIV 41
#define PWM1_MS_MODE 0x8000 // Run in MS mode
#define PWM1_USEFIFO 0x2000 // Data from FIFO
#define PWM1_REVPOLAR 0x1000 // Reverse polarity
#define PWM1_OFFSTATE 0x0800 // Ouput Off state
#define PWM1_REPEATFF 0x0400 // Repeat last value if FIFO empty
#define PWM1_SERIAL 0x0200 // Run in serial mode
#define PWM1_ENABLE 0x0100 // Channel Enable
#define PWM0_MS_MODE 0x0080 // Run in MS mode
#define PWM0_USEFIFO 0x0020 // Data from FIFO
#define PWM0_REVPOLAR 0x0010 // Reverse polarity
#define PWM0_OFFSTATE 0x0008 // Ouput Off state
#define PWM0_REPEATFF 0x0004 // Repeat last value if FIFO empty
#define PWM0_SERIAL 0x0002 // Run in serial mode
#define PWM0_ENABLE 0x0001 // Channel Enable
// Locals to hold pointers to the hardware
static volatile uint32_t *gpio ;
static volatile uint32_t *pwm ;
static volatile uint32_t *clk ;
// The BCM2835 has 54 GPIO pins.
// BCM2835 data sheet, Page 90 onwards.
// There are 6 control registers, each control the functions of a block
// of 10 pins.
// Each control register has 10 sets of 3 bits per GPIO pin:
//
// 000 = GPIO Pin X is an input
// 001 = GPIO Pin X is an output
// 100 = GPIO Pin X takes alternate function 0
// 101 = GPIO Pin X takes alternate function 1
// 110 = GPIO Pin X takes alternate function 2
// 111 = GPIO Pin X takes alternate function 3
// 011 = GPIO Pin X takes alternate function 4
// 010 = GPIO Pin X takes alternate function 5
//
// So the 3 bits for port X are:
// X / 10 + ((X % 10) * 3)
// sysFds:
// Map a file descriptor from the /sys/class/gpio/gpioX/value file
static int sysFds [64] ;
// Mode
static int gpioPinMode ;
// Doing it the Arduino way with lookup tables...
// Yes, it's probably more innefficient than all the bit-twidling, but it
// does tend to make it all a bit clearer. At least to me!
// pinToGpio:
// Take a Wiring pin (0 through X) and re-map it to the BCM_GPIO pin
static int pinToGpio [] =
{
17, 18, 21, 22, 23, 24, 25, 4, // From the Original Wiki - GPIO 0 through 7
0, 1, // I2C - SDA0, SCL0
8, 7, // SPI - CE1, CE0
10, 9, 11, // SPI - MOSI, MISO, SCLK
14, 15, // UART - Tx, Rx
} ;
// gpioToGPFSEL:
// Map a BCM_GPIO pin to it's control port. (GPFSEL 0-5)
static uint8_t gpioToGPFSEL [] =
{
0,0,0,0,0,0,0,0,0,0,
1,1,1,1,1,1,1,1,1,1,
2,2,2,2,2,2,2,2,2,2,
3,3,3,3,3,3,3,3,3,3,
4,4,4,4,4,4,4,4,4,4,
5,5,5,5,5,5,5,5,5,5,
} ;
// gpioToShift
// Define the shift up for the 3 bits per pin in each GPFSEL port
static uint8_t gpioToShift [] =
{
0,3,6,9,12,15,18,21,24,27,
0,3,6,9,12,15,18,21,24,27,
0,3,6,9,12,15,18,21,24,27,
0,3,6,9,12,15,18,21,24,27,
0,3,6,9,12,15,18,21,24,27,
} ;
// gpioToGPSET:
// (Word) offset to the GPIO Set registers for each GPIO pin
static uint8_t gpioToGPSET [] =
{
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
} ;
// gpioToGPCLR:
// (Word) offset to the GPIO Clear registers for each GPIO pin
static uint8_t gpioToGPCLR [] =
{
10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,
} ;
// gpioToGPLEV:
// (Word) offset to the GPIO Input level registers for each GPIO pin
static uint8_t gpioToGPLEV [] =
{
13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,
14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,
} ;
// gpioToPUDCLK
// (Word) offset to the Pull Up Down Clock regsiter
static uint8_t gpioToPUDCLK [] =
{
38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,
39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,
} ;
// gpioToPwmALT
// the ALT value to put a GPIO pin into PWM mode
static uint8_t gpioToPwmALT [] =
{
0, 0, 0, 0, 0, 0, 0, 0, // 0 -> 7
0, 0, 0, 0, FSEL_ALT0, FSEL_ALT0, 0, 0, // 8 -> 15
0, 0, FSEL_ALT5, FSEL_ALT5, 0, 0, 0, 0, // 16 -> 23
0, 0, 0, 0, 0, 0, 0, 0, // 24 -> 31
0, 0, 0, 0, 0, 0, 0, 0, // 32 -> 39
FSEL_ALT0, FSEL_ALT0, 0, 0, 0, FSEL_ALT0, 0, 0, // 40 -> 47
0, 0, 0, 0, 0, 0, 0, 0, // 48 -> 55
0, 0, 0, 0, 0, 0, 0, 0, // 56 -> 63
} ;
static uint8_t gpioToPwmPort [] =
{
0, 0, 0, 0, 0, 0, 0, 0, // 0 -> 7
0, 0, 0, 0, PWM0_DATA, PWM1_DATA, 0, 0, // 8 -> 15
0, 0, PWM0_DATA, PWM1_DATA, 0, 0, 0, 0, // 16 -> 23
0, 0, 0, 0, 0, 0, 0, 0, // 24 -> 31
0, 0, 0, 0, 0, 0, 0, 0, // 32 -> 39
PWM0_DATA, PWM1_DATA, 0, 0, 0, PWM1_DATA, 0, 0, // 40 -> 47
0, 0, 0, 0, 0, 0, 0, 0, // 48 -> 55
0, 0, 0, 0, 0, 0, 0, 0, // 56 -> 63
} ;
// Time for easy calculations
static unsigned long long epoch ;
//////////////////////////////////////////////////////////////////////////////////
/*
* wiringPiGpioMode:
* Set the mode - use Pin numbers (0-16) or GPIO number (seemingly random)
*********************************************************************************
*/
void wiringPiGpioMode (int mode)
{
gpioPinMode = mode ;
}
/*
* wiringPiSetup:
* Must be called once at the start of your program execution.
*
* Default setup: Initialises the system into wiringPi Pin mode and uses the
* memory mapped hardware directly.
*********************************************************************************
*/
int wiringPiSetup (void)
{
int fd ;
uint8_t *gpioMem, *pwmMem, *clkMem ;
struct timeval tv ;
#ifdef DEBUG_PADS
uint8_t *gpioMem, *padsMem, *pwmMem, *clkMem ;
uint32_t *pads ;
#endif
// Set Pin mode by default
wiringPiGpioMode (WPI_MODE_PINS) ;
// Open the master /dev/memory device
if ((fd = open ("/dev/mem", O_RDWR | O_SYNC) ) < 0)
{
fprintf (stderr, "wiringPiSetup: Unable to open /dev/mem: %s\n", strerror (errno)) ;
return -1 ;
}
// GPIO:
// Allocate 2 pages - 1 ...
if ((gpioMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
{
fprintf (stderr, "wiringPiSetup: malloc failed: %s\n", strerror (errno)) ;
return -1 ;
}
// ... presumably to make sure we can round it up to a whole page size
if (((uint32_t)gpioMem % PAGE_SIZE) != 0)
gpioMem += PAGE_SIZE - ((uint32_t)gpioMem % PAGE_SIZE) ;
gpio = (uint32_t *)mmap((caddr_t)gpioMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, GPIO_BASE) ;
if ((int32_t)gpio < 0)
{
fprintf (stderr, "wiringPiSetup: mmap failed: %s\n", strerror (errno)) ;
return -1 ;
}
// PWM
if ((pwmMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
{
fprintf (stderr, "wiringPiSetup: pwmMem malloc failed: %s\n", strerror (errno)) ;
return -1 ;
}
if (((uint32_t)pwmMem % PAGE_SIZE) != 0)
pwmMem += PAGE_SIZE - ((uint32_t)pwmMem % PAGE_SIZE) ;
pwm = (uint32_t *)mmap(pwmMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, GPIO_PWM) ;
if ((int32_t)pwm < 0)
{
fprintf (stderr, "wiringPiSetup: mmap failed (pwm): %s\n", strerror (errno)) ;
return -1 ;
}
// Clock control (needed for PWM)
if ((clkMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
{
fprintf (stderr, "wiringPiSetup: clkMem malloc failed: %s\n", strerror (errno)) ;
return -1 ;
}
if (((uint32_t)clkMem % PAGE_SIZE) != 0)
clkMem += PAGE_SIZE - ((uint32_t)clkMem % PAGE_SIZE) ;
clk = (uint32_t *)mmap(clkMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, CLOCK_BASE) ;
if ((int32_t)clk < 0)
{
fprintf (stderr, "wiringPiSetup: mmap failed (clk): %s\n", strerror (errno)) ;
return -1 ;
}
#ifdef DEBUG_PADS
if ((padsMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
{
fprintf (stderr, "wiringPiSetup: padsMem malloc failed: %s\n", strerror (errno)) ;
return -1 ;
}
if (((uint32_t)padsMem % PAGE_SIZE) != 0)
padsMem += PAGE_SIZE - ((uint32_t)padsMem % PAGE_SIZE) ;
pads = (uint32_t *)mmap(padsMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, GPIO_PADS) ;
if ((int32_t)pads < 0)
{
fprintf (stderr, "wiringPiSetup: mmap failed (pads): %s\n", strerror (errno)) ;
return -1 ;
}
printf ("Checking pads @ 0x%08X\n", (unsigned int)pads) ;
printf ("%08X %08X %08X\n", *(pads + 11), *(pads + 12), *(pads + 13)) ;
// *(pads + 11) = 0x1F ;
printf ("%08X %08X %08X\n", *(pads + 11), *(pads + 12), *(pads + 13)) ;
#endif
gettimeofday (&tv, NULL) ;
epoch = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
return 0 ;
}
/*
* wiringPiSetupGpio:
* Must be called once at the start of your program execution.
*
* GPIO setup: Initialises the system into GPIO Pin mode and uses the
* memory mapped hardware directly.
*********************************************************************************
*/
int wiringPiSetupGpio (void)
{
int x = wiringPiSetup () ;
if (x != 0)
return x ;
wiringPiGpioMode (WPI_MODE_GPIO) ;
return 0 ;
}
/*
* wiringPiSetupSys:
* Must be called once at the start of your program execution.
*
* Initialisation (again), however this time we are using the /sys/class/gpio
* interface to the GPIO systems - slightly slower, but always usable as
* a non-root user, assuming the devices are already exported and setup correctly.
*/
int wiringPiSetupSys (void)
{
int fd, pin ;
struct timeval tv ;
char fName [128] ;
// Set GPIO_SYS mode by default
wiringPiGpioMode (WPI_MODE_GPIO_SYS) ;
// Open and scan the directory, looking for exported GPIOs, and pre-open
// the 'value' part to speed things up for later
for (pin = 0 ; pin < 64 ; ++pin)
{
sysFds [pin] = -1 ;
sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ;
if ((fd = open (fName, O_RDWR)) == -1)
continue ;
sysFds [pin] = fd ;
}
gettimeofday (&tv, NULL) ;
epoch = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
return 0 ;
}
/*
* pinMode:
* Sets the mode of a pin to be input, output or PWM output
*********************************************************************************
*/
void pinMode (int pin, int mode)
{
static int pwmRunning = FALSE ;
int gpioPin, fSel, shift ;
int alt ;
// We can't change the mode in GPIO_SYS mode
if (gpioPinMode == WPI_MODE_GPIO_SYS)
return ;
if (gpioPinMode == WPI_MODE_PINS)
{
if ((pin < 0) || (pin >= NUM_PINS))
return ;
gpioPin = pinToGpio [pin] ;
}
else
gpioPin = pin ;
fSel = gpioToGPFSEL [gpioPin] ;
shift = gpioToShift [gpioPin] ;
/**/ if (mode == INPUT)
*(gpio + fSel) = (*(gpio + fSel) & ~(7 << shift)) ; // Sets bits to zero = input
else if (mode == OUTPUT)
*(gpio + fSel) = (*(gpio + fSel) & ~(7 << shift)) | (1 << shift) ;
else if (mode == PWM_OUTPUT)
{
if ((alt = gpioToPwmALT [gpioPin]) == 0) // Not a PWM pin
return ;
// Set pin to PWM mode
*(gpio + fSel) = (*(gpio + fSel) & ~(7 << shift)) | (alt << shift) ;
// We didn't initialise the PWM hardware at setup time - because it's possible that
// something else is using the PWM - e.g. the Audio systems! So if we use PWM
// here, then we're assuming that nothing else is, otherwise things are going
// to sound a bit funny...
if (!pwmRunning)
{
// Gert/Doms Values
*(clk + PWMCLK_DIV) = 0x5A000000 | (32<<12) ; // set pwm div to 32 (19.2/3 = 600KHz)
*(clk + PWMCLK_CNTL) = 0x5A000011 ; // Source=osc and enable
digitalWrite (pin, LOW) ;
*(pwm + PWM_CONTROL) = 0 ; // Disable PWM
delayMicroseconds (10) ;
*(pwm + PWM0_RANGE) = 0x400 ;
delayMicroseconds (10) ;
*(pwm + PWM1_RANGE) = 0x400 ;
delayMicroseconds (10) ;
// Enable PWMs
*(pwm + PWM0_DATA) = 512 ;
*(pwm + PWM1_DATA) = 512 ;
*(pwm + PWM_CONTROL) = PWM0_ENABLE | PWM1_ENABLE ;
}
}
// When we change mode of any pin, we remove the pull up/downs
pullUpDnControl (pin, PUD_OFF) ;
}
/*
* digitalWrite:
* Set an output bit
*********************************************************************************
*/
void digitalWrite (int pin, int value)
{
int gpioPin ;
if (gpioPinMode == WPI_MODE_PINS)
{
if ((pin < 0) || (pin >= NUM_PINS))
return ;
gpioPin = pinToGpio [pin] ;
}
else
gpioPin = pin ;
if (gpioPinMode == WPI_MODE_GPIO_SYS)
{
if (sysFds [gpioPin] != -1)
{
if (value == LOW)
write (sysFds [gpioPin], "0\n", 2) ;
else
write (sysFds [gpioPin], "1\n", 2) ;
}
}
else
{
if (value == LOW)
*(gpio + gpioToGPCLR [gpioPin]) = 1 << gpioPin ;
else
*(gpio + gpioToGPSET [gpioPin]) = 1 << gpioPin ;
}
}
/*
* pwnWrite:
* Set an output PWM value
*********************************************************************************
*/
void pwmWrite (int pin, int value)
{
int port, gpioPin ;
// We can't do this in GPIO_SYS mode
if (gpioPinMode == WPI_MODE_GPIO_SYS)
return ;
if (gpioPinMode == WPI_MODE_PINS)
{
if ((pin < 0) || (pin >= NUM_PINS))
return ;
gpioPin = pinToGpio [pin] ;
}
else
gpioPin = pin ;
port = gpioToPwmPort [gpioPin] ;
*(pwm + port) = value & ~0x400 ;
}
/*
* digitalRead:
* Read the value of a given Pin, returning HIGH or LOW
*********************************************************************************
*/
int digitalRead (int pin)
{
int gpioPin ;
char c ;
if (gpioPinMode == WPI_MODE_PINS)
{
if ((pin < 0) || (pin >= NUM_PINS))
return 0 ;
gpioPin = pinToGpio [pin] ;
}
else
gpioPin = pin ;
if (gpioPinMode == WPI_MODE_GPIO_SYS)
{
if (sysFds [gpioPin] == -1)
return 0 ;
else
{
lseek (sysFds [gpioPin], 0L, SEEK_SET) ;
read (sysFds [gpioPin], &c, 1) ;
return (c == '0') ? 0 : 1 ;
}
}
else
{
if ((*(gpio + gpioToGPLEV [gpioPin]) & (1 << gpioPin)) != 0)
return HIGH ;
else
return LOW ;
}
}
/*
* pullUpDownCtrl:
* Control the internal pull-up/down resistors on a GPIO pin
* The Arduino only has pull-ups and these are enabled by writing 1
* to a port when in input mode - this paradigm doesn't quite apply
* here though.
*********************************************************************************
*/
void pullUpDnControl (int pin, int pud)
{
int gpioPin ;
// We can't do this in GPIO_SYS mode
if (gpioPinMode == WPI_MODE_GPIO_SYS)
return ;
if (gpioPinMode == WPI_MODE_PINS)
{
if ((pin < 0) || (pin >= NUM_PINS))
return ;
gpioPin = pinToGpio [pin] ;
}
else
gpioPin = pin ;
*(gpio + 37) = pud ;
delayMicroseconds (10) ;
*(gpio + gpioToPUDCLK [gpioPin]) = 1 << gpioPin ;
delayMicroseconds (10) ;
*(gpio + 37) = 0 ;
*(gpio + gpioToPUDCLK [gpioPin]) = 0 ;
}
/*
* delay: delayMicroseconds
* Wait for some number of milli/micro seconds
*********************************************************************************
*/
void delay (unsigned int howLong)
{
struct timespec sleeper, dummy ;
sleeper.tv_sec = (time_t)(howLong / 1000) ;
sleeper.tv_nsec = (long)(howLong % 1000) * 1000000 ;
nanosleep (&sleeper, &dummy) ;
}
void delayMicroseconds (unsigned int howLong)
{
struct timespec sleeper, dummy ;
sleeper.tv_sec = 0 ;
sleeper.tv_nsec = (long)(howLong * 1000) ;
nanosleep (&sleeper, &dummy) ;
}
/*
* millis:
* Return a number of milliseconds as an unsigned int.
*********************************************************************************
*/
unsigned int millis (void)
{
struct timeval tv ;
unsigned long long t1 ;
gettimeofday (&tv, NULL) ;
t1 = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
return (uint32_t)(t1 - epoch) ;
}

69
wiringPi/wiringPi.h Normal file
View File

@ -0,0 +1,69 @@
/*
* wiringPi:
* Arduino compatable (ish) Wiring library for the Raspberry Pi
* Copyright (c) 2012 Gordon Henderson
***********************************************************************
* This file is part of wiringPi:
* https://projects.drogon.net/raspberry-pi/wiringpi/
*
* wiringPi is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* wiringPi is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************
*/
// Handy defines
#define NUM_PINS 17
#define WPI_MODE_PINS 0
#define WPI_MODE_GPIO 1
#define WPI_MODE_GPIO_SYS 2
#define INPUT 0
#define OUTPUT 1
#define PWM_OUTPUT 2
#define LOW 0
#define HIGH 1
#define PUD_OFF 0
#define PUD_DOWN 1
#define PUD_UP 2
// Function prototypes
// c++ wrappers thanks to a commend by Nick Lott
// (and others on the Raspberry Pi forums)
#ifdef __cplusplus
extern "C" {
#endif
extern int wiringPiSetup (void) ;
extern int wiringPiSetupSys (void) ;
extern int wiringPiSetupGpio (void) ;
extern void wiringPiGpioMode (int mode) ;
extern void pullUpDnControl (int pin, int pud) ;
extern void pinMode (int pin, int mode) ;
extern void digitalWrite (int pin, int value) ;
extern void pwmWrite (int pin, int value) ;
extern int digitalRead (int pin) ;
extern void delay (unsigned int howLong) ;
extern void delayMicroseconds (unsigned int howLong) ;
extern unsigned int millis (void) ;
#ifdef __cplusplus
}
#endif

84
wiringPi/wiringShift.c Normal file
View File

@ -0,0 +1,84 @@
/*
* wiringShift.c:
* Emulate some of the Arduino wiring functionality.
*
* Copyright (c) 2009-2012 Gordon Henderson.
***********************************************************************
* This file is part of wiringPi:
* https://projects.drogon.net/raspberry-pi/wiringpi/
*
* wiringPi is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* wiringPi is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************
*/
#include <stdint.h>
#include "wiringPi.h"
#include "wiringShift.h"
/*
* shiftIn:
* Shift data in from a clocked source
*********************************************************************************
*/
uint8_t shiftIn (uint8_t dPin, uint8_t cPin, uint8_t order)
{
uint8_t value = 0 ;
int8_t i ;
if (order == MSBFIRST)
for (i = 7 ; i >= 0 ; --i)
{
digitalWrite (cPin, HIGH) ;
value |= digitalRead (dPin) << i ;
digitalWrite (cPin, LOW) ;
}
else
for (i = 0 ; i < 8 ; ++i)
{
digitalWrite (cPin, HIGH) ;
value |= digitalRead (dPin) << i ;
digitalWrite (cPin, LOW) ;
}
return value;
}
/*
* shiftOut:
* Shift data out to a clocked source
*********************************************************************************
*/
void shiftOut (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val)
{
int8_t i;
if (order == MSBFIRST)
for (i = 7 ; i >= 0 ; --i)
{
digitalWrite (dPin, val & (1 << i)) ;
digitalWrite (cPin, HIGH) ;
digitalWrite (cPin, LOW) ;
}
else
for (i = 0 ; i < 8 ; ++i)
{
digitalWrite (dPin, val & (1 << i)) ;
digitalWrite (cPin, HIGH) ;
digitalWrite (cPin, LOW) ;
}
}

41
wiringPi/wiringShift.h Normal file
View File

@ -0,0 +1,41 @@
/*
* wiringShift.h:
* Emulate some of the Arduino wiring functionality.
*
* Copyright (c) 2009-2012 Gordon Henderson.
***********************************************************************
* This file is part of wiringPi:
* https://projects.drogon.net/raspberry-pi/wiringpi/
*
* wiringPi is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* wiringPi is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************
*/
#define LSBFIRST 0
#define MSBFIRST 1
#ifndef _STDINT_H
# include <stdint.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
extern uint8_t shiftIn (uint8_t dPin, uint8_t cPin, uint8_t order) ;
extern void shiftOut (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val) ;
#ifdef __cplusplus
}
#endif