162306a36Sopenharmony_ci.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later 262306a36Sopenharmony_ci.. c:namespace:: RC 362306a36Sopenharmony_ci 462306a36Sopenharmony_ci.. _lirc_set_send_duty_cycle: 562306a36Sopenharmony_ci 662306a36Sopenharmony_ci****************************** 762306a36Sopenharmony_ciioctl LIRC_SET_SEND_DUTY_CYCLE 862306a36Sopenharmony_ci****************************** 962306a36Sopenharmony_ci 1062306a36Sopenharmony_ciName 1162306a36Sopenharmony_ci==== 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ciLIRC_SET_SEND_DUTY_CYCLE - Set the duty cycle of the carrier signal for 1462306a36Sopenharmony_ciIR transmit. 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ciSynopsis 1762306a36Sopenharmony_ci======== 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci.. c:macro:: LIRC_SET_SEND_DUTY_CYCLE 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_ci``int ioctl(int fd, LIRC_SET_SEND_DUTY_CYCLE, __u32 *duty_cycle)`` 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ciArguments 2462306a36Sopenharmony_ci========= 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_ci``fd`` 2762306a36Sopenharmony_ci File descriptor returned by open(). 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci``duty_cycle`` 3062306a36Sopenharmony_ci Duty cicle, describing the pulse width in percent (from 1 to 99) of 3162306a36Sopenharmony_ci the total cycle. Values 0 and 100 are reserved. 3262306a36Sopenharmony_ci 3362306a36Sopenharmony_ciDescription 3462306a36Sopenharmony_ci=========== 3562306a36Sopenharmony_ci 3662306a36Sopenharmony_ciGet/set the duty cycle of the carrier signal for IR transmit. 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_ciCurrently, no special meaning is defined for 0 or 100, but this 3962306a36Sopenharmony_cicould be used to switch off carrier generation in the future, so 4062306a36Sopenharmony_cithese values should be reserved. 4162306a36Sopenharmony_ci 4262306a36Sopenharmony_ciReturn Value 4362306a36Sopenharmony_ci============ 4462306a36Sopenharmony_ci 4562306a36Sopenharmony_ciOn success 0 is returned, on error -1 and the ``errno`` variable is set 4662306a36Sopenharmony_ciappropriately. The generic error codes are described at the 4762306a36Sopenharmony_ci:ref:`Generic Error Codes <gen-errors>` chapter. 48