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insn demo

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David Schleef 2000-08-09 21:11:29 +00:00
parent bb5cead91f
commit f9c356a840
1 changed files with 64 additions and 0 deletions
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/*
A little input demo
*/
#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>
extern int verbose_flag;
extern int subdevice;
extern int range;
extern int channel;
extern int aref;
extern char *filename;
comedi_t *device;
int main(int argc, char *argv[])
{
int ret;
comedi_insn insn;
comedi_insnlist il;
lsampl_t data;
parse_options(argc,argv);
device=comedi_open(filename);
if(!device){
comedi_perror(filename);
exit(0);
}
if(verbose_flag){
printf("measuring device=%s subdevice=%d channel=%d range=%d analog reference=%d\n",
filename,subdevice,channel,range,aref);
}
il.n_insns=1;
il.insns=&insn;
insn.insn=INSN_READ;
insn.n=1;
insn.data=&data;
insn.subdev=subdevice;
insn.chanspec=CR_PACK(channel,range,aref);
ret=ioctl(comedi_fileno(device),COMEDI_INSNLIST,&il);
//ret=comedi_data_read(device,subdevice,channel,range,aref,&data);
if(ret<0){
comedi_perror(filename);
exit(0);
}
printf("%d\n",data);
return 0;
}