#include
#include
#include
#include
int main(int argc, char **argv)
{
int pwm;
int pwm_number;
int fd;
if (argc != 3 || sscanf(argv[1], "%d", &pwm_number) != 1 || sscanf(argv[2],"%d", &pwm) != 1)
{
fprintf(stderr, "input error\n");
exit(1);
}
fd = open("/dev/iopwm", 0);
if (fd < 0)
{
perror("open device /dev/iopwm");
exit(1);
}
ioctl(fd, led_number , pwm);
close(fd);
return 0;
}