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.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. _FE_DISEQC_SEND_BURST:
**************************
ioctl FE_DISEQC_SEND_BURST
**************************
Name
====
FE_DISEQC_SEND_BURST - Sends a 22KHz tone burst for 2x1 mini DiSEqC satellite selection.
Synopsis
========
.. c:function:: int ioctl( int fd, FE_DISEQC_SEND_BURST, enum fe_sec_mini_cmd tone )
:name: FE_DISEQC_SEND_BURST
Arguments
=========
``fd``
File descriptor returned by :ref:`open() <frontend_f_open>`.
``tone``
An integer enumered value described at :c:type:`fe_sec_mini_cmd`.
Description
===========
This ioctl is used to set the generation of a 22kHz tone burst for mini
DiSEqC satellite selection for 2x1 switches. This call requires
read/write permissions.
It provides support for what's specified at
`Digital Satellite Equipment Control (DiSEqC) - Simple "ToneBurst" Detection Circuit specification. <http://www.eutelsat.com/files/contributed/satellites/pdf/Diseqc/associated%20docs/simple_tone_burst_detec.pdf>`__
Return Value
============
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
Generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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