projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
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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 | |
| 15e7d615 MCC |
14 | Synopsis |
| 15 | ======== | |
| 5377d91f | 16 | |
| 1b81f010 | 17 | .. c:function:: int ioctl(int fd, int request = FE_READ_BER, uint32_t *ber) |
| 5377d91f | 18 | |
| 15e7d615 | 19 | |
| 9e1f61c0 | 20 | Arguments |
| 15e7d615 | 21 | ========= |
| 5377d91f | 22 | |
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23 | .. flat-table:: |
| 24 | :header-rows: 0 | |
| 25 | :stub-columns: 0 | |
| 26 | ||
| 27 | ||
| 28 | - .. row 1 | |
| 29 | ||
| 30 | - int fd | |
| 31 | ||
| 32 | - File descriptor returned by a previous call to open(). | |
| 33 | ||
| 34 | - .. row 2 | |
| 35 | ||
| 36 | - int request | |
| 37 | ||
| 7347081e | 38 | - Equals :ref:`FE_READ_BER` for this command. |
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39 | |
| 40 | - .. row 3 | |
| 41 | ||
| 9e1f61c0 | 42 | - uint32_t \*ber |
| 5377d91f | 43 | |
| 9e1f61c0 | 44 | - The bit error rate is stored into \*ber. |
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45 | |
| 46 | ||
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47 | Description |
| 48 | =========== | |
| 49 | ||
| 50 | This ioctl call returns the bit error rate for the signal currently | |
| 51 | received/demodulated by the front-end. For this command, read-only | |
| 52 | access to the device is sufficient. | |
| 53 | ||
| 54 | ||
| 9e1f61c0 | 55 | Return Value |
| 15e7d615 | 56 | ============ |
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57 | |
| 58 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
| 59 | appropriately. The generic error codes are described at the | |
| 60 | :ref:`Generic Error Codes <gen-errors>` chapter. |