18c2ecf20Sopenharmony_ci.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 28c2ecf20Sopenharmony_ci.. c:namespace:: RC 38c2ecf20Sopenharmony_ci 48c2ecf20Sopenharmony_ci.. _lirc_set_send_duty_cycle: 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ci****************************** 78c2ecf20Sopenharmony_ciioctl LIRC_SET_SEND_DUTY_CYCLE 88c2ecf20Sopenharmony_ci****************************** 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ciName 118c2ecf20Sopenharmony_ci==== 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ciLIRC_SET_SEND_DUTY_CYCLE - Set the duty cycle of the carrier signal for 148c2ecf20Sopenharmony_ciIR transmit. 158c2ecf20Sopenharmony_ci 168c2ecf20Sopenharmony_ciSynopsis 178c2ecf20Sopenharmony_ci======== 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ci.. c:macro:: LIRC_SET_SEND_DUTY_CYCLE 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_ci``int ioctl(int fd, LIRC_SET_SEND_DUTY_CYCLE, __u32 *duty_cycle)`` 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_ciArguments 248c2ecf20Sopenharmony_ci========= 258c2ecf20Sopenharmony_ci 268c2ecf20Sopenharmony_ci``fd`` 278c2ecf20Sopenharmony_ci File descriptor returned by open(). 288c2ecf20Sopenharmony_ci 298c2ecf20Sopenharmony_ci``duty_cycle`` 308c2ecf20Sopenharmony_ci Duty cicle, describing the pulse width in percent (from 1 to 99) of 318c2ecf20Sopenharmony_ci the total cycle. Values 0 and 100 are reserved. 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_ciDescription 348c2ecf20Sopenharmony_ci=========== 358c2ecf20Sopenharmony_ci 368c2ecf20Sopenharmony_ciGet/set the duty cycle of the carrier signal for IR transmit. 378c2ecf20Sopenharmony_ci 388c2ecf20Sopenharmony_ciCurrently, no special meaning is defined for 0 or 100, but this 398c2ecf20Sopenharmony_cicould be used to switch off carrier generation in the future, so 408c2ecf20Sopenharmony_cithese values should be reserved. 418c2ecf20Sopenharmony_ci 428c2ecf20Sopenharmony_ciReturn Value 438c2ecf20Sopenharmony_ci============ 448c2ecf20Sopenharmony_ci 458c2ecf20Sopenharmony_ciOn success 0 is returned, on error -1 and the ``errno`` variable is set 468c2ecf20Sopenharmony_ciappropriately. The generic error codes are described at the 478c2ecf20Sopenharmony_ci:ref:`Generic Error Codes <gen-errors>` chapter. 48