stv0g/comedilib
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

New demo program.

Browse source
This commit is contained in:
Frank Mori Hess 2007-07-12 14:57:08 +00:00
parent c5bd91e4c8
commit 81d55d2a52
1 changed files with 65 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

65
demo/choose_filter.c Normal file
View file

@ -0,0 +1,65 @@
/*
* INSN_CONFIG_FILTER example
* Part of Comedilib
*
* Copyright (c) 1999,2000 David A. Schleef <ds@schleef.org>
* Copyright (c) 2007 Frank Mori Hess <fmhess@users.sourceforge.net>
*
* 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 subdevice that supports
* INSN_CONFIG_FILTER, such as the PFI subdevice on an NI m-series
* or 660x board.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <comedilib.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include <ctype.h>
#include "examples.h"
comedi_t *device;
int main(int argc, char *argv[])
{
int retval;
lsampl_t filter_selection;
struct parsed_options options;
init_parsed_options(&options);
parse_options(&options, argc, argv);
device = comedi_open(options.filename);
if(!device){
comedi_perror(options.filename);
exit(-1);
}
filter_selection = options.value;
printf("Selecting filter %d on subdevice %d channel %d.\n", filter_selection, options.subdevice, options.channel);
comedi_insn insn;
lsampl_t data[2];
memset(&insn, 0, sizeof(comedi_insn));
insn.insn = INSN_CONFIG;
insn.subdev = options.subdevice;
insn.chanspec = options.channel;
insn.data = data;
insn.n = sizeof(data) / sizeof(data[0]);
data[0] = INSN_CONFIG_FILTER;
data[1] = filter_selection;
retval = comedi_do_insn(device, &insn);
if(retval < 0) comedi_perror("comedi_do_insn");
return retval;
}