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#define USAGE \
"\n" \
"\nTest switching the voltage signal high and low on a SAT frontend." \
"\n(Note: DiSEqC equipment ignores this after it has once seen a diseqc" \
"\n sequence; reload the driver or unplug/replug the SAT cable to reset.)" \
"\n" \
"\nusage: FRONTEND=/dev/dvb/adapterX/frontendX setvoltage {13|18}" \
"\n"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/dvb/frontend.h>
int main (int argc, char **argv)
{
char *fedev = "/dev/dvb/adapter0/frontend0";
int fd, r;
if (argc != 2 || (strcmp(argv[1], "13") && strcmp(argv[1], "18"))) {
fprintf (stderr, "usage: %s <13|18>\n" USAGE, argv[0]);
return -1;
}
if (getenv("FRONTEND"))
fedev = getenv("FRONTEND");
printf("setvoltage: using '%s'\n", fedev);
if ((fd = open (fedev, O_RDWR)) < 0)
perror ("open");
if (strcmp(argv[1], "13") == 0)
r = ioctl (fd, FE_SET_VOLTAGE, SEC_VOLTAGE_13);
else
r = ioctl (fd, FE_SET_VOLTAGE, SEC_VOLTAGE_18);
if (r == -1)
perror ("ioctl FE_SET_VOLTAGE");
close (fd);
return 0;
}
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