6.4.7. ioctl LIRC_SET_SEND_DUTY_CYCLE¶
6.4.7.1. Name¶
LIRC_SET_SEND_DUTY_CYCLE - Set the duty cycle of the carrier signal for IR transmit.
6.4.7.2. Synopsis¶
-
int
ioctl
(int fd, LIRC_SET_SEND_DUTY_CYCLE, __u32 *duty_cycle)¶
6.4.7.3. Arguments¶
fd
- File descriptor returned by open().
duty_cycle
- Duty cicle, describing the pulse width in percent (from 1 to 99) of the total cycle. Values 0 and 100 are reserved.
6.4.7.4. Description¶
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.
6.4.7.5. 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.