Compiling comedi sample programs

First thing you will have to do is install the "comedi" library. Under Ubuntu the package name is "libcomedi0" and "libcomedi-dev". Both packages are available in the Ubuntu "universe" repository.

Once you have the comedi library installed, the command to compile comedi programs using gcc/linux is

$gcc -Wall -O2 <program_name>.c -lcomedi -lm

Sample program :

#include <stdio.h>   /* for printf() */
#include <comedilib.h>
int subdev = 0;         /* change this to your input subdevice */
int chan = 0;           /* change this to your channel */
int range = 0;          /* more on this later */
int aref = AREF_GROUND; /* more on this later */

int main(int argc,char *argv[])
{
  comedi_t *it;
  lsampl_t data;
  it=comedi_open("/dev/comedi0");
  comedi_data_read(it,subdev,chan,range,aref, & data);
  printf("%d\n",data);
  return 0;
}