58 lines
1.4 KiB
ReStructuredText
58 lines
1.4 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
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.. c:namespace:: RC
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.. _lirc_get_min_timeout:
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.. _lirc_get_max_timeout:
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****************************************************
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ioctls LIRC_GET_MIN_TIMEOUT and LIRC_GET_MAX_TIMEOUT
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****************************************************
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Name
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====
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LIRC_GET_MIN_TIMEOUT / LIRC_GET_MAX_TIMEOUT - Obtain the possible timeout
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range for IR receive.
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Synopsis
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========
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.. c:macro:: LIRC_GET_MIN_TIMEOUT
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``int ioctl(int fd, LIRC_GET_MIN_TIMEOUT, __u32 *timeout)``
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.. c:macro:: LIRC_GET_MAX_TIMEOUT
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``int ioctl(int fd, LIRC_GET_MAX_TIMEOUT, __u32 *timeout)``
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Arguments
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=========
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``fd``
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File descriptor returned by open().
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``timeout``
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Timeout, in microseconds.
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Description
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===========
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Some devices have internal timers that can be used to detect when
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there's no IR activity for a long time. This can help lircd in
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detecting that a IR signal is finished and can speed up the decoding
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process. Returns an integer value with the minimum/maximum timeout
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that can be set.
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.. note::
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Some devices have a fixed timeout, in that case
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both ioctls will return the same value even though the timeout
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cannot be changed via :ref:`LIRC_SET_REC_TIMEOUT`.
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Return Value
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============
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On success 0 is returned, on error -1 and the ``errno`` variable is set
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appropriately. The generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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