| .. Permission is granted to copy, distribute and/or modify this |
| .. document under the terms of the GNU Free Documentation License, |
| .. Version 1.1 or any later version published by the Free Software |
| .. Foundation, with no Invariant Sections, no Front-Cover Texts |
| .. and no Back-Cover Texts. A copy of the license is included at |
| .. Documentation/userspace-api/media/fdl-appendix.rst. |
| .. |
| .. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections |
| |
| .. _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. |
