| .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later |
| .. c:namespace:: RC |
| |
| .. _lirc_set_transmitter_mask: |
| |
| ******************************* |
| ioctl LIRC_SET_TRANSMITTER_MASK |
| ******************************* |
| |
| Name |
| ==== |
| |
| LIRC_SET_TRANSMITTER_MASK - Enables send codes on a given set of transmitters |
| |
| Synopsis |
| ======== |
| |
| .. c:macro:: LIRC_SET_TRANSMITTER_MASK |
| |
| ``int ioctl(int fd, LIRC_SET_TRANSMITTER_MASK, __u32 *mask)`` |
| |
| Arguments |
| ========= |
| |
| ``fd`` |
| File descriptor returned by open(). |
| |
| ``mask`` |
| Mask with channels to enable tx. Channel 0 is the least significant bit. |
| |
| Description |
| =========== |
| |
| Some IR TX devices have multiple output channels, in such case, |
| :ref:`LIRC_CAN_SET_TRANSMITTER_MASK <LIRC-CAN-SET-TRANSMITTER-MASK>` is |
| returned via :ref:`LIRC_GET_FEATURES` and this ioctl sets what channels will |
| send IR codes. |
| |
| This ioctl enables the given set of transmitters. The first transmitter is |
| encoded by the least significant bit and so on. |
| |
| When an invalid bit mask is given, i.e. a bit is set, even though the device |
| does not have so many transitters, then this ioctl returns the number of |
| available transitters and does nothing otherwise. |
| |
| Return Value |
| ============ |
| |
| On success 0 is returned, on error -1 and the ``errno`` variable is set |
| appropriately. The generic error codes are described at the |
| :ref:`Generic Error Codes <gen-errors>` chapter. |
