mirror of
https://github.com/clockworkpi/WiringPi.git
synced 2025-12-13 16:18:52 +01:00
13bbba7a22
and developed the new ISR - Interrupt Service Routine handler - much easier than the old waitForInterrupt code! Minor tweaks to the gpio program to recognise the environment variable WIRINGPI_DEBUG too, and removed the printing of the errors from the main wiringPi setup routines (and added some new ones!)
58 lines
1006 B
C
58 lines
1006 B
C
/*
|
|
* serialTest.c:
|
|
* Very simple program to test the serial port. Expects
|
|
* the port to be looped back to itself
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
#include <wiringPi.h>
|
|
#include <wiringSerial.h>
|
|
|
|
int main ()
|
|
{
|
|
int fd ;
|
|
int count ;
|
|
unsigned int nextTime ;
|
|
|
|
if ((fd = serialOpen ("/dev/ttyAMA0", 115200)) < 0)
|
|
{
|
|
fprintf (stderr, "Unable to open serial device: %s\n", strerror (errno)) ;
|
|
return 1 ;
|
|
}
|
|
|
|
if (wiringPiSetup () == -1)
|
|
{
|
|
fprintf (stdout, "Unable to start wiringPi: %s\n", strerror (errno)) ;
|
|
return 1 ;
|
|
}
|
|
|
|
nextTime = millis () + 300 ;
|
|
|
|
for (count = 0 ; count < 256 ; )
|
|
{
|
|
if (millis () > nextTime)
|
|
{
|
|
printf ("\nOut: %3d: ", count) ;
|
|
fflush (stdout) ;
|
|
serialPutchar (fd, count) ;
|
|
nextTime += 300 ;
|
|
++count ;
|
|
}
|
|
|
|
delay (3) ;
|
|
|
|
while (serialDataAvail (fd))
|
|
{
|
|
printf (" -> %3d", serialGetchar (fd)) ;
|
|
fflush (stdout) ;
|
|
}
|
|
}
|
|
|
|
printf ("\n") ;
|
|
return 0 ;
|
|
}
|