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Linux kernel mirror (for testing)
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kernel
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linux
1.. -*- coding: utf-8; mode: rst -*-
2
3.. _lirc_set_rec_carrier_range:
4
5********************************
6ioctl LIRC_SET_REC_CARRIER_RANGE
7********************************
8
9Name
10====
11
12LIRC_SET_REC_CARRIER_RANGE - Set lower bond of the carrier used to modulate
13IR receive.
14
15Synopsis
16========
17
18.. cpp:function:: int ioctl( int fd, int request, __u32 *frequency )
19
20Arguments
21=========
22
23``fd``
24 File descriptor returned by open().
25
26``request``
27 LIRC_SET_REC_CARRIER_RANGE
28
29``frequency``
30 Frequency of the carrier that modulates PWM data, in Hz.
31
32Description
33===========
34
35This ioctl sets the upper range of carrier frequency that will be recognized
36by the IR receiver.
37
38.. note::
39
40 To set a range use :ref:`LIRC_SET_REC_CARRIER_RANGE
41 <LIRC_SET_REC_CARRIER_RANGE>` with the lower bound first and later call
42 :ref:`LIRC_SET_REC_CARRIER <LIRC_SET_REC_CARRIER>` with the upper bound.
43
44Return Value
45============
46
47On success 0 is returned, on error -1 and the ``errno`` variable is set
48appropriately. The generic error codes are described at the
49:ref:`Generic Error Codes <gen-errors>` chapter.