projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5377d91f MH |
1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | ||
| 3 | .. _FE_READ_BER: | |
| 4 | ||
| 5 | *********** | |
| 6 | FE_READ_BER | |
| 7 | *********** | |
| 8 | ||
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9 | Name |
| 10 | ==== | |
| 5377d91f | 11 | |
| 15e7d615 | 12 | FE_READ_BER |
| 5377d91f | 13 | |
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14 | .. attention:: This ioctl is deprecated. |
| 15 | ||
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16 | Synopsis |
| 17 | ======== | |
| 5377d91f | 18 | |
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19 | .. c:function:: int ioctl(int fd, FE_READ_BER, uint32_t *ber) |
| 20 | :name: FE_READ_BER | |
| 5377d91f | 21 | |
| 15e7d615 | 22 | |
| 9e1f61c0 | 23 | Arguments |
| 15e7d615 | 24 | ========= |
| 5377d91f | 25 | |
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26 | ``fd`` |
| 27 | File descriptor returned by :c:func:`open() <dvb-fe-open>`. | |
| 5377d91f | 28 | |
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29 | ``ber`` |
| 30 | The bit error rate is stored into \*ber. | |
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31 | |
| 32 | ||
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33 | Description |
| 34 | =========== | |
| 35 | ||
| 36 | This ioctl call returns the bit error rate for the signal currently | |
| 37 | received/demodulated by the front-end. For this command, read-only | |
| 38 | access to the device is sufficient. | |
| 39 | ||
| 40 | ||
| 9e1f61c0 | 41 | Return Value |
| 15e7d615 | 42 | ============ |
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43 | |
| 44 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
| 45 | appropriately. The generic error codes are described at the | |
| 46 | :ref:`Generic Error Codes <gen-errors>` chapter. |