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added dio.c

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This commit is contained in:
David Schleef 2000-10-19 06:57:09 +00:00
parent 307527f46b
commit 1fb67651b6
2 changed files with 76 additions and 1 deletions
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2
demo/Makefile
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@ -6,7 +6,7 @@ LDFLAGS = -L../lib/ -lcomedi -lm
BINS=cmd tut1 tut2
MBINS=inp inpn sv eeprom_dump info outp insn antialias ao_waveform
MBINS=inp inpn sv eeprom_dump info outp insn antialias ao_waveform dio
all: $(patsubst %,_mbins_%,$(MBINS)) $(patsubst %,_bins_%,$(BINS))

75
demo/dio.c Normal file
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@ -0,0 +1,75 @@
/*
* Digital I/O example
* Part of Comedilib
*
* Copyright (c) 1999,2000 David A. Schleef <ds@schleef.org>
*
* This file may be freely modified, distributed, and combined with
* other software, as long as proper attribution is given in the
* source code.
*/
/*
* Requirements: A board with a digital I/O subdevice. Not just
* a 'digital input' or 'digital output' subdevice, but one in
* which the channels can be configured between input and output.
*/
#include <stdio.h>
#include <comedilib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <getopt.h>
#include <ctype.h>
#include "examples.h"
comedi_t *device;
int main(int argc, char *argv[])
{
int ret;
int stype;
int i;
unsigned int mask;
unsigned int data;
parse_options(argc,argv);
device=comedi_open(filename);
if(!device){
comedi_perror(filename);
exit(0);
}
stype = comedi_get_subdevice_type(device,subdevice);
if(stype!=COMEDI_SUBD_DIO){
printf("%d is not a digital I/O subdevice\n",subdevice);
exit(0);
}
printf("configuring pin %d for output...\n",channel);
ret=comedi_dio_config(device,subdevice,channel,COMEDI_OUTPUT);
printf("toggling pin %d rapidly...\n",channel);
for(i=0;i<10000;i++){
comedi_dio_write(device,subdevice,channel,1);
comedi_dio_write(device,subdevice,channel,0);
}
printf("toggling pin %d rapidly (using bitfield)...\n",channel);
mask = 1<<channel;
for(i=0;i<10000;i++){
data = mask;
comedi_dio_bitfield(device,subdevice,mask,&data);
data = 0;
comedi_dio_bitfield(device,subdevice,mask,&data);
}
return 0;
}