60 lines
951 B
C
60 lines
951 B
C
/*
|
|
Demo of the comedi_sv_*() functions
|
|
*/
|
|
|
|
#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[])
|
|
{
|
|
lsampl_t data;
|
|
int ret;
|
|
comedi_sv_t sv;
|
|
double volts;
|
|
|
|
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);
|
|
}
|
|
|
|
comedi_sv_init(&sv,device,subdevice,channel);
|
|
|
|
sv.range=range;
|
|
sv.aref=aref;
|
|
sv.n=100;
|
|
|
|
ret=comedi_sv_measure(&sv,&volts);
|
|
if(ret<0){
|
|
comedi_perror("comedi_sv_measure()");
|
|
exit(0);
|
|
}
|
|
|
|
printf("%g\n",volts);
|
|
|
|
return 0;
|
|
}
|
|
|