1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later 2 .. c:namespace:: RC 3 4 .. _lirc_set_transmitter_mask: 5 6 ******************************* 7 ioctl LIRC_SET_TRANSMITTER_MASK 8 ******************************* 9 10 Name 11 ==== 12 13 LIRC_SET_TRANSMITTER_MASK - Enables send codes on a given set of transmitters 14 15 Synopsis 16 ======== 17 18 .. c:macro:: LIRC_SET_TRANSMITTER_MASK 19 20 ``int ioctl(int fd, LIRC_SET_TRANSMITTER_MASK, __u32 *mask)`` 21 22 Arguments 23 ========= 24 25 ``fd`` 26 File descriptor returned by open(). 27 28 ``mask`` 29 Mask with channels to enable tx. Channel 0 is the least significant bit. 30 31 Description 32 =========== 33 34 Some IR TX devices have multiple output channels, in such case, 35 :ref:`LIRC_CAN_SET_TRANSMITTER_MASK <LIRC-CAN-SET-TRANSMITTER-MASK>` is 36 returned via :ref:`LIRC_GET_FEATURES` and this ioctl sets what channels will 37 send IR codes. 38 39 This ioctl enables the given set of transmitters. The first transmitter is 40 encoded by the least significant bit and so on. 41 42 When an invalid bit mask is given, i.e. a bit is set, even though the device 43 does not have so many transitters, then this ioctl returns the number of 44 available transitters and does nothing otherwise. 45 46 Return Value 47 ============ 48 49 On success 0 is returned, on error -1 and the ``errno`` variable is set 50 appropriately. The generic error codes are described at the 51 :ref:`Generic Error Codes <gen-errors>` chapter.
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