.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later .. c:namespace:: RC

.. _lirc_set_rec_carrier:

---

ioctl LIRC_SET_REC_CARRIER

---

Name

LIRC_SET_REC_CARRIER - Set carrier used to modulate IR receive.

Synopsis

.. c:macro:: LIRC_SET_REC_CARRIER

int ioctl(int fd, LIRC_SET_REC_CARRIER, __u32 *frequency)

Arguments

fd File descriptor returned by open().

frequency Frequency of the carrier that modulates PWM data, in Hz.

Description

Set receive carrier used to modulate IR PWM pulses and spaces.

.. note::

If called together with :ref:LIRC_SET_REC_CARRIER_RANGE, this ioctl sets the upper bound frequency that will be recognized by the device.

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 :ref:Generic Error Codes <gen-errors> chapter.