| .. -*- coding: utf-8; mode: rst -*- |
| |
| .. _FE_READ_BER: |
| |
| *********** |
| FE_READ_BER |
| *********** |
| |
| DESCRIPTION |
| |
| This ioctl call returns the bit error rate for the signal currently |
| received/demodulated by the front-end. For this command, read-only |
| access to the device is sufficient. |
| |
| SYNOPSIS |
| |
| int ioctl(int fd, int request = :ref:`FE_READ_BER <FE_READ_BER>`, |
| uint32_t *ber); |
| |
| PARAMETERS |
| |
| |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| |
| |
| - .. row 1 |
| |
| - int fd |
| |
| - File descriptor returned by a previous call to open(). |
| |
| - .. row 2 |
| |
| - int request |
| |
| - Equals :ref:`FE_READ_BER <FE_READ_BER>` for this command. |
| |
| - .. row 3 |
| |
| - uint32_t *ber |
| |
| - The bit error rate is stored into *ber. |
| |
| |
| 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. |
| |
| |
| .. ------------------------------------------------------------------------------ |
| .. This file was automatically converted from DocBook-XML with the dbxml |
| .. library (https://github.com/return42/sphkerneldoc). The origin XML comes |
| .. from the linux kernel, refer to: |
| .. |
| .. * https://github.com/torvalds/linux/tree/master/Documentation/DocBook |
| .. ------------------------------------------------------------------------------ |