6.5.7. ioctl LIRC_SET_SEND_DUTY_CYCLE¶

6.5.7.1. Name¶

LIRC_SET_SEND_DUTY_CYCLE - Set the duty cycle of the carrier signal for IR transmit.

6.5.7.2. Synopsis¶

LIRC_SET_SEND_DUTY_CYCLE¶

int ioctl(int fd, LIRC_SET_SEND_DUTY_CYCLE, __u32 *duty_cycle)

6.5.7.3. Arguments¶

fd: File descriptor returned by open().
duty_cycle: Duty cycle, describing the pulse width in percent (from 1 to 99) of the total cycle. Values 0 and 100 are reserved.

6.5.7.4. 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.

6.5.7.5. 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.