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

.. _lirc_set_rec_carrier_range:

---

ioctl LIRC_SET_REC_CARRIER_RANGE

---

Name

LIRC_SET_REC_CARRIER_RANGE - Set lower bound of the carrier used to modulate IR receive.

Synopsis

.. c:macro:: LIRC_SET_REC_CARRIER_RANGE

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

Arguments

fd File descriptor returned by open().

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

Description

This ioctl sets the upper range of carrier frequency that will be recognized by the IR receiver.

.. note::

To set a range use :ref:LIRC_SET_REC_CARRIER_RANGE <LIRC_SET_REC_CARRIER_RANGE> with the lower bound first and later call :ref:LIRC_SET_REC_CARRIER <LIRC_SET_REC_CARRIER> with the upper bound.

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.