78 lines
1.4 KiB
C
78 lines
1.4 KiB
C
|
#include <errno.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <ctype.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <sys/ioctl.h>
|
||
|
|
#include <pthread.h>
|
||
|
|
|
||
|
|
#include <linux/dvb/mod.h>
|
||
|
|
|
||
|
|
static int set_property(int fd, uint32_t cmd, uint32_t data)
|
||
|
|
{
|
||
|
|
struct dtv_property p;
|
||
|
|
struct dtv_properties c;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
p.cmd = cmd;
|
||
|
|
c.num = 1;
|
||
|
|
c.props = &p;
|
||
|
|
p.u.data = data;
|
||
|
|
ret = ioctl(fd, FE_SET_PROPERTY, &c);
|
||
|
|
if (ret < 0) {
|
||
|
|
fprintf(stderr, "FE_SET_PROPERTY returned %d\n", errno);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int get_property(int fd, uint32_t cmd, uint32_t *data)
|
||
|
|
{
|
||
|
|
struct dtv_property p;
|
||
|
|
struct dtv_properties c;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
p.cmd = cmd;
|
||
|
|
c.num = 1;
|
||
|
|
c.props = &p;
|
||
|
|
ret = ioctl(fd, FE_GET_PROPERTY, &c);
|
||
|
|
if (ret < 0) {
|
||
|
|
fprintf(stderr, "FE_GET_PROPERTY returned %d\n", ret);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
*data = p.u.data;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
int main()
|
||
|
|
{
|
||
|
|
int fd;
|
||
|
|
struct dvb_mod_params mp;
|
||
|
|
struct dvb_mod_channel_params mc;
|
||
|
|
uint32_t data;
|
||
|
|
|
||
|
|
fd = open("/dev/dvb/adapter0/mod0", O_RDONLY);
|
||
|
|
|
||
|
|
/* gain 0-255 */
|
||
|
|
get_property(fd, MODULATOR_GAIN, &data);
|
||
|
|
printf("Modulator gain = %u\n", data);
|
||
|
|
set_property(fd, MODULATOR_GAIN, 120);
|
||
|
|
get_property(fd, MODULATOR_GAIN, &data);
|
||
|
|
printf("Modulator gain = %u\n", data);
|
||
|
|
|
||
|
|
get_property(fd, MODULATOR_STATUS, &data);
|
||
|
|
printf("Modulator status = %u\n", data);
|
||
|
|
|
||
|
|
|
||
|
|
//set_property(fd, MODULATOR_RESET, 0);
|
||
|
|
close(fd);
|
||
|
|
}
|
||
|
|
|