76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
|
/*
|
||
|
|
* serialTest.c:
|
||
|
|
* Very simple program to test the serial port. Expects
|
||
|
|
* the port to be looped back to itself
|
||
|
|
*
|
||
|
|
* Copyright (c) 2012-2013 Gordon Henderson. <projects@drogon.net>
|
||
|
|
***********************************************************************
|
||
|
|
* 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 <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/ttyS2", 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 ;
|
||
|
|
}
|