6.5.7. ioctl LIRC_SET_SEND_DUTY_CYCLE¶
LIRC_SET_SEND_DUTY_CYCLE - Set the duty cycle of the carrier signal for IR transmit.
int ioctl(int fd, LIRC_SET_SEND_DUTY_CYCLE, __u32 *duty_cycle)
File descriptor returned by open().
Duty cicle, describing the pulse width in percent (from 1 to 99) of the total cycle. Values 0 and 100 are reserved.
Get/set the duty cycle of the carrier signal for IR transmit.
Currently, no special meaning is defined for 0 or 100, but this could be used to switch off carrier generation in the future, so these values should be reserved.
188.8.131.52. Return Value¶
On success 0 is returned, on error -1 and the
errno variable is set
appropriately. The generic error codes are described at the
Generic Error Codes chapter.