| .. -*- coding: utf-8; mode: rst -*- | |
| .. _lirc_get_rec_resolution: | |
| ***************************** | |
| ioctl LIRC_GET_REC_RESOLUTION | |
| ***************************** | |
| Name | |
| ==== | |
| LIRC_GET_REC_RESOLUTION - Obtain the value of receive resolution, in microseconds. | |
| Synopsis | |
| ======== | |
| .. c:function:: int ioctl( int fd, LIRC_GET_REC_RESOLUTION, __u32 *microseconds) | |
| :name: LIRC_GET_REC_RESOLUTION | |
| Arguments | |
| ========= | |
| ``fd`` | |
| File descriptor returned by open(). | |
| ``microseconds`` | |
| Resolution, in microseconds. | |
| Description | |
| =========== | |
| Some receivers have maximum resolution which is defined by internal | |
| sample rate or data format limitations. E.g. it's common that | |
| signals can only be reported in 50 microsecond steps. | |
| This ioctl returns the integer value with such resolution, with can be | |
| used by userspace applications like lircd to automatically adjust the | |
| tolerance value. | |
| 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. |