18c2ecf20Sopenharmony_ci.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 28c2ecf20Sopenharmony_ci.. c:namespace:: RC 38c2ecf20Sopenharmony_ci 48c2ecf20Sopenharmony_ci.. _lirc_set_rec_carrier_range: 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ci******************************** 78c2ecf20Sopenharmony_ciioctl LIRC_SET_REC_CARRIER_RANGE 88c2ecf20Sopenharmony_ci******************************** 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ciName 118c2ecf20Sopenharmony_ci==== 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ciLIRC_SET_REC_CARRIER_RANGE - Set lower bound of the carrier used to modulate 148c2ecf20Sopenharmony_ciIR receive. 158c2ecf20Sopenharmony_ci 168c2ecf20Sopenharmony_ciSynopsis 178c2ecf20Sopenharmony_ci======== 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ci.. c:macro:: LIRC_SET_REC_CARRIER_RANGE 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_ci``int ioctl(int fd, LIRC_SET_REC_CARRIER_RANGE, __u32 *frequency)`` 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_ciArguments 248c2ecf20Sopenharmony_ci========= 258c2ecf20Sopenharmony_ci 268c2ecf20Sopenharmony_ci``fd`` 278c2ecf20Sopenharmony_ci File descriptor returned by open(). 288c2ecf20Sopenharmony_ci 298c2ecf20Sopenharmony_ci``frequency`` 308c2ecf20Sopenharmony_ci Frequency of the carrier that modulates PWM data, in Hz. 318c2ecf20Sopenharmony_ci 328c2ecf20Sopenharmony_ciDescription 338c2ecf20Sopenharmony_ci=========== 348c2ecf20Sopenharmony_ci 358c2ecf20Sopenharmony_ciThis ioctl sets the upper range of carrier frequency that will be recognized 368c2ecf20Sopenharmony_ciby the IR receiver. 378c2ecf20Sopenharmony_ci 388c2ecf20Sopenharmony_ci.. note:: 398c2ecf20Sopenharmony_ci 408c2ecf20Sopenharmony_ci To set a range use :ref:`LIRC_SET_REC_CARRIER_RANGE 418c2ecf20Sopenharmony_ci <LIRC_SET_REC_CARRIER_RANGE>` with the lower bound first and later call 428c2ecf20Sopenharmony_ci :ref:`LIRC_SET_REC_CARRIER <LIRC_SET_REC_CARRIER>` with the upper bound. 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_ciReturn Value 458c2ecf20Sopenharmony_ci============ 468c2ecf20Sopenharmony_ci 478c2ecf20Sopenharmony_ciOn success 0 is returned, on error -1 and the ``errno`` variable is set 488c2ecf20Sopenharmony_ciappropriately. The generic error codes are described at the 498c2ecf20Sopenharmony_ci:ref:`Generic Error Codes <gen-errors>` chapter. 50