55 lines
1.5 KiB
ReStructuredText
55 lines
1.5 KiB
ReStructuredText
.. Permission is granted to copy, distribute and/or modify this
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.. document under the terms of the GNU Free Documentation License,
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.. Version 1.1 or any later version published by the Free Software
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.. Foundation, with no Invariant Sections, no Front-Cover Texts
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.. and no Back-Cover Texts. A copy of the license is included at
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.. Documentation/userspace-api/media/fdl-appendix.rst.
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..
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.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
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.. _lirc_set_rec_carrier_range:
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********************************
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ioctl LIRC_SET_REC_CARRIER_RANGE
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********************************
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Name
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====
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LIRC_SET_REC_CARRIER_RANGE - Set lower bound of the carrier used to modulate
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IR receive.
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Synopsis
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========
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.. c:function:: int ioctl( int fd, LIRC_SET_REC_CARRIER_RANGE, __u32 *frequency )
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:name: LIRC_SET_REC_CARRIER_RANGE
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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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``frequency``
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Frequency of the carrier that modulates PWM data, in Hz.
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Description
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===========
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This ioctl sets the upper range of carrier frequency that will be recognized
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by the IR receiver.
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.. note::
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To set a range use :ref:`LIRC_SET_REC_CARRIER_RANGE
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<LIRC_SET_REC_CARRIER_RANGE>` with the lower bound first and later call
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:ref:`LIRC_SET_REC_CARRIER <LIRC_SET_REC_CARRIER>` with the upper bound.
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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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