.. -*- coding: utf-8; mode: rst -*-

.. _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.