projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 978084b1 MCC |
1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | ||
| 3 | .. _lirc_set_send_duty_cycle: | |
| 4 | ||
| 5 | ****************************** | |
| 6 | ioctl LIRC_SET_SEND_DUTY_CYCLE | |
| 7 | ****************************** | |
| 8 | ||
| 9 | Name | |
| 10 | ==== | |
| 11 | ||
| 12 | LIRC_SET_SEND_DUTY_CYCLE - Set the duty cycle of the carrier signal for | |
| 13 | IR transmit. | |
| 14 | ||
| 15 | Synopsis | |
| 16 | ======== | |
| 17 | ||
| 18 | .. cpp:function:: int ioctl( int fd, int request, __u32 *duty_cycle) | |
| 19 | ||
| 20 | Arguments | |
| 21 | ========= | |
| 22 | ||
| 23 | ``fd`` | |
| 24 | File descriptor returned by open(). | |
| 25 | ||
| 26 | ``request`` | |
| 27 | LIRC_SET_SEND_DUTY_CYCLE | |
| 28 | ||
| 29 | ``duty_cycle`` | |
| 30 | Duty cicle, describing the pulse width in percent (from 1 to 99) of | |
| 31 | the total cycle. Values 0 and 100 are reserved. | |
| 32 | ||
| 33 | ||
| 34 | Description | |
| 35 | =========== | |
| 36 | ||
| 37 | Get/set the duty cycle of the carrier signal for IR transmit. | |
| 38 | ||
| 39 | Currently, no special meaning is defined for 0 or 100, but this | |
| 40 | could be used to switch off carrier generation in the future, so | |
| 41 | these values should be reserved. | |
| 42 | ||
| 43 | ||
| 44 | Return Value | |
| 45 | ============ | |
| 46 | ||
| 47 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
| 48 | appropriately. The generic error codes are described at the | |
| 49 | :ref:`Generic Error Codes <gen-errors>` chapter. |