6.5.11. ioctl LIRC_SET_REC_CARRIER_RANGE¶
LIRC_SET_REC_CARRIER_RANGE - Set lower bound of the carrier used to modulate IR receive.
int ioctl(int fd, LIRC_SET_REC_CARRIER_RANGE, __u32 *frequency)
File descriptor returned by open().
Frequency of the carrier that modulates PWM data, in Hz.
This ioctl sets the upper range of carrier frequency that will be recognized by the IR receiver.
To set a range use LIRC_SET_REC_CARRIER_RANGE with the lower bound first and later call LIRC_SET_REC_CARRIER with the upper bound.
220.127.116.11. 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.