1.. Permission is granted to copy, distribute and/or modify this 2.. document under the terms of the GNU Free Documentation License, 3.. Version 1.1 or any later version published by the Free Software 4.. Foundation, with no Invariant Sections, no Front-Cover Texts 5.. and no Back-Cover Texts. A copy of the license is included at 6.. Documentation/userspace-api/media/fdl-appendix.rst. 7.. 8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections 9 10.. _lirc_set_send_duty_cycle: 11 12****************************** 13ioctl LIRC_SET_SEND_DUTY_CYCLE 14****************************** 15 16Name 17==== 18 19LIRC_SET_SEND_DUTY_CYCLE - Set the duty cycle of the carrier signal for 20IR transmit. 21 22Synopsis 23======== 24 25.. c:function:: int ioctl( int fd, LIRC_SET_SEND_DUTY_CYCLE, __u32 *duty_cycle) 26 :name: LIRC_SET_SEND_DUTY_CYCLE 27 28Arguments 29========= 30 31``fd`` 32 File descriptor returned by open(). 33 34``duty_cycle`` 35 Duty cicle, describing the pulse width in percent (from 1 to 99) of 36 the total cycle. Values 0 and 100 are reserved. 37 38 39Description 40=========== 41 42Get/set the duty cycle of the carrier signal for IR transmit. 43 44Currently, no special meaning is defined for 0 or 100, but this 45could be used to switch off carrier generation in the future, so 46these values should be reserved. 47 48 49Return Value 50============ 51 52On success 0 is returned, on error -1 and the ``errno`` variable is set 53appropriately. The generic error codes are described at the 54:ref:`Generic Error Codes <gen-errors>` chapter. 55