1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
4 .. _lirc_set_rec_carrier:
6 **************************
7 ioctl LIRC_SET_REC_CARRIER
8 **************************
13 LIRC_SET_REC_CARRIER - Set carrier used to modulate IR receive.
18 .. c:macro:: LIRC_SET_REC_CARRIER
20 ``int ioctl(int fd, LIRC_SET_REC_CARRIER, __u32 *frequency)``
26 File descriptor returned by open().
29 Frequency of the carrier that modulates PWM data, in Hz.
34 Set receive carrier used to modulate IR PWM pulses and spaces.
38 If called together with :ref:`LIRC_SET_REC_CARRIER_RANGE`, this ioctl
39 sets the upper bound frequency that will be recognized by the device.
44 On success 0 is returned, on error -1 and the ``errno`` variable is set
45 appropriately. The generic error codes are described at the
46 :ref:`Generic Error Codes <gen-errors>` chapter.