18c2ecf20Sopenharmony_ci.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 28c2ecf20Sopenharmony_ci.. c:namespace:: DTV.fe 38c2ecf20Sopenharmony_ci 48c2ecf20Sopenharmony_ci.. _FE_DISEQC_SEND_BURST: 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ci************************** 78c2ecf20Sopenharmony_ciioctl FE_DISEQC_SEND_BURST 88c2ecf20Sopenharmony_ci************************** 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ciName 118c2ecf20Sopenharmony_ci==== 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ciFE_DISEQC_SEND_BURST - Sends a 22KHz tone burst for 2x1 mini DiSEqC satellite selection. 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ciSynopsis 168c2ecf20Sopenharmony_ci======== 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ci.. c:macro:: FE_DISEQC_SEND_BURST 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ci``int ioctl(int fd, FE_DISEQC_SEND_BURST, enum fe_sec_mini_cmd tone)`` 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ciArguments 238c2ecf20Sopenharmony_ci========= 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ci``fd`` 268c2ecf20Sopenharmony_ci File descriptor returned by :c:func:`open()`. 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ci``tone`` 298c2ecf20Sopenharmony_ci An integer enumered value described at :c:type:`fe_sec_mini_cmd`. 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ciDescription 328c2ecf20Sopenharmony_ci=========== 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ciThis ioctl is used to set the generation of a 22kHz tone burst for mini 358c2ecf20Sopenharmony_ciDiSEqC satellite selection for 2x1 switches. This call requires 368c2ecf20Sopenharmony_ciread/write permissions. 378c2ecf20Sopenharmony_ci 388c2ecf20Sopenharmony_ciIt provides support for what's specified at 398c2ecf20Sopenharmony_ci`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>`__ 408c2ecf20Sopenharmony_ci 418c2ecf20Sopenharmony_ciReturn Value 428c2ecf20Sopenharmony_ci============ 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_ciOn success 0 is returned. 458c2ecf20Sopenharmony_ci 468c2ecf20Sopenharmony_ciOn error -1 is returned, and the ``errno`` variable is set 478c2ecf20Sopenharmony_ciappropriately. 488c2ecf20Sopenharmony_ci 498c2ecf20Sopenharmony_ciGeneric error codes are described at the 508c2ecf20Sopenharmony_ci:ref:`Generic Error Codes <gen-errors>` chapter. 51