mirror of
https://github.com/clockworkpi/WiringPi.git
synced 2025-12-13 16:18:52 +01:00
Added new SPI driver helpers.
Changed the gertboard code to use it and ran more tests on he Gertboard code.
This commit is contained in:
Gordon Henderson
parent
4666573910
commit
99095e3fa0
@ -14,33 +14,63 @@
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdint.h>
|
||||
//#include <stdlib.h>
|
||||
#include <math.h>
|
||||
|
||||
#define B_SIZE 200
|
||||
#undef DO_TIMING
|
||||
|
||||
#include <wiringPi.h>
|
||||
#include <gertboard.h>
|
||||
|
||||
int main (void)
|
||||
{
|
||||
int angle ;
|
||||
int h1 ;
|
||||
double angle ;
|
||||
int i ;
|
||||
uint32_t x1 ;
|
||||
int buffer [B_SIZE] ;
|
||||
|
||||
#ifdef DO_TIMING
|
||||
unsigned int now, then ;
|
||||
#endif
|
||||
|
||||
printf ("Raspberry Pi Gertboard SPI test program\n") ;
|
||||
|
||||
if (gertboardSPISetup () == -1)
|
||||
if (wiringPiSetupSys () < 0)
|
||||
return -1 ;
|
||||
|
||||
if (gertboardSPISetup () < 0)
|
||||
return 1 ;
|
||||
|
||||
// Generate a Sine Wave
|
||||
|
||||
for (i = 0 ; i < B_SIZE ; ++i)
|
||||
{
|
||||
angle = ((double)i / (double)B_SIZE) * M_PI * 2.0 ;
|
||||
buffer [i] = (int)rint ((sin (angle)) * 127.0 + 128.0) ;
|
||||
}
|
||||
|
||||
|
||||
for (;;)
|
||||
{
|
||||
for (angle = 0 ; angle < 360 ; ++angle)
|
||||
{
|
||||
h1 = (int)rint (sin ((double)angle * M_PI / 180.0) * 127.0 + 128.0) ;
|
||||
gertboardAnalogWrite (0, h1) ;
|
||||
#ifdef DO_TIMING
|
||||
then = millis () ;
|
||||
#endif
|
||||
|
||||
for (i = 0 ; i < B_SIZE ; ++i)
|
||||
{
|
||||
gertboardAnalogWrite (0, buffer [i]) ;
|
||||
|
||||
#ifndef DO_TIMING
|
||||
x1 = gertboardAnalogRead (0) ;
|
||||
gertboardAnalogWrite (1, x1 >> 2) ; // 10-bit A/D, 8-bit D/A
|
||||
#endif
|
||||
}
|
||||
|
||||
#ifdef DO_TIMING
|
||||
now = millis () ;
|
||||
printf ("%4d mS, %9.7f S/sample", now - then, ((double)(now - then) / 1000.0) / (double)B_SIZE) ;
|
||||
printf (" -> %9.4f samples/sec \n", 1 / (((double)(now - then) / 1000.0) / (double)B_SIZE)) ;
|
||||
#endif
|
||||
}
|
||||
|
||||
return 0 ;
|
||||
|
||||
32
gpio/gpio.1
32
gpio/gpio.1
@ -36,14 +36,23 @@ range
|
||||
.PP
|
||||
.B gpio
|
||||
.B load \ i2c/spi
|
||||
.PP
|
||||
.B gpio
|
||||
.B gbr
|
||||
channel
|
||||
.PP
|
||||
.B gpio
|
||||
.B gbw
|
||||
channel value
|
||||
|
||||
.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.
|
||||
is a swiss army knofe of a command line tool to allow the user easy
|
||||
access to the GPIO pins on the Raspberry Pi and the SPI A/D and D/A
|
||||
convertors on the Gertboard. 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 \fI/sys/class/gpio\fR
|
||||
system directory to allow subsequent programs to use the \fR/sys/class/gpio\fR
|
||||
@ -142,6 +151,21 @@ Change the PWM range register. The default is 1024.
|
||||
This loads the i2c or the spi drivers into the system and changes the permissions on
|
||||
the associated /dev/ entries so that the current user has access to them.
|
||||
|
||||
.TP
|
||||
.B gbr
|
||||
channel
|
||||
|
||||
This reads the analog to digital convertor on the Gertboard on the given
|
||||
channel. The board jumpers need to be in-place to do this operation.
|
||||
|
||||
.TP
|
||||
.B gbw
|
||||
channel value
|
||||
|
||||
This writes the supplied value to the output channel on the Gertboards
|
||||
SPI digital to analogue convertor.
|
||||
The board jumpers need to be in-place to do this operation.
|
||||
|
||||
|
||||
.SH "WiringPi vs. GPIO Pin numbering"
|
||||
|
||||
|
||||
94
gpio/gpio.c
94
gpio/gpio.c
@ -1,6 +1,7 @@
|
||||
/*
|
||||
* gpio.c:
|
||||
* Set-UID command-line interface to the Raspberry Pi's GPIO
|
||||
* Swiss-Army-Knife, Set-UID command-line interface to the Raspberry
|
||||
* Pi's GPIO.
|
||||
* Copyright (c) 2012 Gordon Henderson
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
@ -21,7 +22,6 @@
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#include <wiringPi.h>
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
@ -32,12 +32,15 @@
|
||||
#include <sys/types.h>
|
||||
#include <fcntl.h>
|
||||
|
||||
#include <wiringPi.h>
|
||||
#include <gertboard.h>
|
||||
|
||||
#ifndef TRUE
|
||||
# define TRUE (1==1)
|
||||
# define FALSE (1==2)
|
||||
#endif
|
||||
|
||||
#define VERSION "1.1"
|
||||
#define VERSION "1.2"
|
||||
|
||||
static int wpMode ;
|
||||
|
||||
@ -49,7 +52,9 @@ char *usage = "Usage: gpio -v\n"
|
||||
" gpio drive <group> <value>\n"
|
||||
" gpio pwm-bal/pwm-ms \n"
|
||||
" gpio pwmr <range> \n"
|
||||
" gpio load spi/i2c" ;
|
||||
" gpio load spi/i2c\n"
|
||||
" gpio gbr <channel>\n"
|
||||
" gpio gbw <channel> <value>\n" ;
|
||||
|
||||
|
||||
/*
|
||||
@ -518,6 +523,82 @@ static void doPadDrive (int argc, char *argv [])
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doGbw:
|
||||
* gpio gbw channel value
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void doGbw (int argc, char *argv [])
|
||||
{
|
||||
int channel, value ;
|
||||
|
||||
if (argc != 4)
|
||||
{
|
||||
fprintf (stderr, "Usage: %s gbr <channel> <value>\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
channel = atoi (argv [2]) ;
|
||||
value = atoi (argv [3]) ;
|
||||
|
||||
if ((channel < 0) || (channel > 1))
|
||||
{
|
||||
fprintf (stderr, "%s: channel must be 0 or 1\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
if ((value < 0) || (value > 1023))
|
||||
{
|
||||
fprintf (stderr, "%s: value must be from 0 to 255\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
if (gertboardSPISetup () == -1)
|
||||
{
|
||||
fprintf (stderr, "Unable to initialise the Gertboard SPI interface: %s\n", strerror (errno)) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
gertboardAnalogWrite (channel, value) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doGbr:
|
||||
* gpio gbr channel
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void doGbr (int argc, char *argv [])
|
||||
{
|
||||
int channel ;
|
||||
|
||||
if (argc != 3)
|
||||
{
|
||||
fprintf (stderr, "Usage: %s gbr <channel>\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
channel = atoi (argv [2]) ;
|
||||
|
||||
if ((channel < 0) || (channel > 1))
|
||||
{
|
||||
fprintf (stderr, "%s: channel must be 0 or 1\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
if (gertboardSPISetup () == -1)
|
||||
{
|
||||
fprintf (stderr, "Unable to initialise the Gertboard SPI interface: %s\n", strerror (errno)) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
printf ("%d\n",gertboardAnalogRead (channel)) ;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* doWrite:
|
||||
* gpio write pin value
|
||||
@ -709,6 +790,11 @@ int main (int argc, char *argv [])
|
||||
if (strcasecmp (argv [1], "drive") == 0) { doPadDrive (argc, argv) ; return 0 ; }
|
||||
if (strcasecmp (argv [1], "load" ) == 0) { doLoad (argc, argv) ; return 0 ; }
|
||||
|
||||
// Gertboard commands
|
||||
|
||||
if (strcasecmp (argv [1], "gbr" ) == 0) { doGbr (argc, argv) ; return 0 ; }
|
||||
if (strcasecmp (argv [1], "gbw" ) == 0) { doGbw (argc, argv) ; return 0 ; }
|
||||
|
||||
// Check for -g argument
|
||||
|
||||
if (strcasecmp (argv [1], "-g") == 0)
|
||||
|
||||
@ -38,12 +38,12 @@ LIBS =
|
||||
SRC = wiringPi.c wiringPiFace.c wiringSerial.c wiringShift.c \
|
||||
gertboard.c \
|
||||
piNes.c \
|
||||
lcd.c piHiPri.c piThread.c softPwm.c
|
||||
lcd.c piHiPri.c piThread.c softPwm.c wiringPiSPI.c
|
||||
|
||||
OBJ = wiringPi.o wiringPiFace.o wiringSerial.o wiringShift.o \
|
||||
gertboard.o \
|
||||
piNes.o \
|
||||
lcd.o piHiPri.o piThread.o softPwm.o
|
||||
lcd.o piHiPri.o piThread.o softPwm.o wiringPiSPI.o
|
||||
|
||||
all: $(TARGET)
|
||||
|
||||
@ -78,6 +78,7 @@ install: $(TARGET)
|
||||
install -m 0644 piNes.h /usr/local/include
|
||||
install -m 0644 softPwm.h /usr/local/include
|
||||
install -m 0644 lcd.h /usr/local/include
|
||||
install -m 0644 wiringPiSPI.h /usr/local/include
|
||||
install -m 0644 libwiringPi.a /usr/local/lib
|
||||
|
||||
uninstall:
|
||||
|
||||
@ -38,23 +38,16 @@
|
||||
#include <sys/ioctl.h>
|
||||
#include <linux/spi/spidev.h>
|
||||
|
||||
#include "wiringPiSPI.h"
|
||||
|
||||
#include "gertboard.h"
|
||||
|
||||
// The A-D convertor won't run at more than 1MHz @ 3.3v
|
||||
|
||||
// The SPI bus parameters
|
||||
// Variables as they need to be passed as pointers later on
|
||||
|
||||
static char *spiA2D = "/dev/spidev0.0" ;
|
||||
static char *spiD2A = "/dev/spidev0.1" ;
|
||||
static uint8_t spiMode = 0 ;
|
||||
static uint8_t spiBPW = 8 ;
|
||||
static uint32_t spiSpeed = 100000 ; // 1MHz
|
||||
static uint16_t spiDelay = 0;
|
||||
|
||||
// Locals here to keep track of everything
|
||||
|
||||
static int spiFdA2D ;
|
||||
static int spiFdD2A ;
|
||||
#define SPI_ADC_SPEED 1000000
|
||||
#define SPI_DAC_SPEED 1000000
|
||||
#define SPI_A2D 0
|
||||
#define SPI_D2A 1
|
||||
|
||||
|
||||
/*
|
||||
@ -66,10 +59,7 @@ static int spiFdD2A ;
|
||||
|
||||
void gertboardAnalogWrite (int chan, int value)
|
||||
{
|
||||
uint8_t spiBufTx [2] ;
|
||||
uint8_t spiBufRx [2] ;
|
||||
struct spi_ioc_transfer spi ;
|
||||
|
||||
uint8_t spiData [2] ;
|
||||
uint8_t chanBits, dataBits ;
|
||||
|
||||
if (chan == 0)
|
||||
@ -80,17 +70,10 @@ void gertboardAnalogWrite (int chan, int value)
|
||||
chanBits |= ((value >> 4) & 0x0F) ;
|
||||
dataBits = ((value << 4) & 0xF0) ;
|
||||
|
||||
spiBufTx [0] = chanBits ;
|
||||
spiBufTx [1] = dataBits ;
|
||||
spiData [0] = chanBits ;
|
||||
spiData [1] = dataBits ;
|
||||
|
||||
spi.tx_buf = (unsigned long)spiBufTx ;
|
||||
spi.rx_buf = (unsigned long)spiBufRx ;
|
||||
spi.len = 2 ;
|
||||
spi.delay_usecs = spiDelay ;
|
||||
spi.speed_hz = spiSpeed ;
|
||||
spi.bits_per_word = spiBPW ;
|
||||
|
||||
ioctl (spiFdD2A, SPI_IOC_MESSAGE(1), &spi) ;
|
||||
wiringPiSPIDataRW (SPI_D2A, spiData, 2) ;
|
||||
}
|
||||
|
||||
|
||||
@ -103,60 +86,21 @@ void gertboardAnalogWrite (int chan, int value)
|
||||
|
||||
int gertboardAnalogRead (int chan)
|
||||
{
|
||||
uint8_t spiBufTx [4] ;
|
||||
uint8_t spiBufRx [4] ;
|
||||
struct spi_ioc_transfer spi ;
|
||||
uint8_t spiData [2] ;
|
||||
|
||||
uint8_t chanBits ;
|
||||
|
||||
if (chan == 0)
|
||||
chanBits = 0b0110100 ;
|
||||
chanBits = 0b11010000 ;
|
||||
else
|
||||
chanBits = 0b0111100 ;
|
||||
chanBits = 0b11110000 ;
|
||||
|
||||
spiBufTx [0] = chanBits ;
|
||||
spiBufTx [1] = 0 ;
|
||||
spiData [0] = chanBits ;
|
||||
spiData [1] = 0 ;
|
||||
|
||||
spi.tx_buf = (unsigned long)spiBufTx ;
|
||||
spi.rx_buf = (unsigned long)spiBufRx ;
|
||||
spi.len = 4 ;
|
||||
spi.delay_usecs = spiDelay ;
|
||||
spi.speed_hz = spiSpeed ;
|
||||
spi.bits_per_word = spiBPW ;
|
||||
wiringPiSPIDataRW (SPI_A2D, spiData, 2) ;
|
||||
|
||||
ioctl (spiFdA2D, SPI_IOC_MESSAGE(1), &spi) ;
|
||||
|
||||
return spiBufRx [0] << 8 | spiBufRx [1] ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* setParams:
|
||||
* Output the SPI bus parameters to the given device
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static int setParams (int fd)
|
||||
{
|
||||
if (ioctl (fd, SPI_IOC_WR_MODE, &spiMode) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_RD_MODE, &spiMode) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_WR_BITS_PER_WORD, &spiBPW) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_RD_BITS_PER_WORD, &spiBPW) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_WR_MAX_SPEED_HZ, &spiSpeed) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_RD_MAX_SPEED_HZ, &spiSpeed) < 0)
|
||||
return -1 ;
|
||||
|
||||
return 0 ;
|
||||
return ((spiData [0] << 7) | (spiData [1] >> 1)) & 0x3FF ;
|
||||
}
|
||||
|
||||
|
||||
@ -168,16 +112,10 @@ static int setParams (int fd)
|
||||
|
||||
int gertboardSPISetup (void)
|
||||
{
|
||||
if ((spiFdA2D = open (spiA2D, O_RDWR)) < 0)
|
||||
if (wiringPiSPISetup (SPI_A2D, SPI_ADC_SPEED) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (setParams (spiFdA2D) != 0)
|
||||
return -1 ;
|
||||
|
||||
if ((spiFdD2A = open (spiD2A, O_RDWR)) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (setParams (spiFdD2A) != 0)
|
||||
if (wiringPiSPISetup (SPI_D2A, SPI_DAC_SPEED) < 0)
|
||||
return -1 ;
|
||||
|
||||
return 0 ;
|
||||
|
||||
117
wiringPi/wiringPiSPI.c
Normal file
117
wiringPi/wiringPiSPI.c
Normal file
@ -0,0 +1,117 @@
|
||||
/*
|
||||
* wiringPiSPI.c:
|
||||
* Simplified SPI access routines
|
||||
* 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 Lesser 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 Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with wiringPi.
|
||||
* If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
|
||||
#include <stdint.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <linux/spi/spidev.h>
|
||||
|
||||
#include "wiringPiSPI.h"
|
||||
|
||||
|
||||
// The SPI bus parameters
|
||||
// Variables as they need to be passed as pointers later on
|
||||
|
||||
static char *spiDev0 = "/dev/spidev0.0" ;
|
||||
static char *spiDev1 = "/dev/spidev0.1" ;
|
||||
static uint8_t spiMode = 0 ;
|
||||
static uint8_t spiBPW = 8 ;
|
||||
static uint16_t spiDelay = 0;
|
||||
|
||||
static uint32_t spiSpeeds [2] ;
|
||||
static int spiFds [2] ;
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiSPIGetFd:
|
||||
* Return the file-descriptor for the given channel
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiSPIGetFd (int channel)
|
||||
{
|
||||
return spiFds [channel &1] ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiSPIDataRW:
|
||||
* Write and Read a block of data over the SPI bus.
|
||||
* Note the data ia being read into the transmit buffer, so will
|
||||
* overwrite it!
|
||||
* This is also a full-duplex operation.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiSPIDataRW (int channel, unsigned char *data, int len)
|
||||
{
|
||||
struct spi_ioc_transfer spi ;
|
||||
|
||||
channel &= 1 ;
|
||||
|
||||
spi.tx_buf = (unsigned long)data ;
|
||||
spi.rx_buf = (unsigned long)data ;
|
||||
spi.len = len ;
|
||||
spi.delay_usecs = spiDelay ;
|
||||
spi.speed_hz = spiSpeeds [channel] ;
|
||||
spi.bits_per_word = spiBPW ;
|
||||
|
||||
return ioctl (spiFds [channel], SPI_IOC_MESSAGE(1), &spi) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiSPISetup:
|
||||
* Open the SPI device, and set it up, etc.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiSPISetup (int channel, int speed)
|
||||
{
|
||||
int fd ;
|
||||
|
||||
channel &= 1 ;
|
||||
|
||||
if ((fd = open (channel == 0 ? spiDev0 : spiDev1, O_RDWR)) < 0)
|
||||
return -1 ;
|
||||
|
||||
spiSpeeds [channel] = speed ;
|
||||
spiFds [channel] = fd ;
|
||||
|
||||
// Set SPI parameters.
|
||||
// Why are we reading it afterwriting it? I've no idea, but for now I'm blindly
|
||||
// copying example code I've seen online...
|
||||
|
||||
if (ioctl (fd, SPI_IOC_WR_MODE, &spiMode) < 0) return -1 ;
|
||||
if (ioctl (fd, SPI_IOC_RD_MODE, &spiMode) < 0) return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_WR_BITS_PER_WORD, &spiBPW) < 0) return -1 ;
|
||||
if (ioctl (fd, SPI_IOC_RD_BITS_PER_WORD, &spiBPW) < 0) return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed) < 0) return -1 ;
|
||||
if (ioctl (fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed) < 0) return -1 ;
|
||||
|
||||
return fd ;
|
||||
}
|
||||
35
wiringPi/wiringPiSPI.h
Normal file
35
wiringPi/wiringPiSPI.h
Normal file
@ -0,0 +1,35 @@
|
||||
/*
|
||||
* wiringPiSPI.h:
|
||||
* Simplified SPI access routines
|
||||
* 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 Lesser 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 Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with wiringPi.
|
||||
* If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
int wiringPiSPIGetFd (int channel) ;
|
||||
int wiringPiSPIDataRW (int channel, unsigned char *data, int len) ;
|
||||
int wiringPiSPISetup (int channel, int speed) ;
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
Loading…
x
Reference in New Issue
Block a user