/alps/ipecamera : revision 286

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Add Michele's explanation how to find which sensor is connected to the FPGA board

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* In fact two lines returned simultaneously (in each payload). So, there is 8 channels per line and 640 payloads are transferred to complete 2 lines.

* Actually, 641. There is always 1 extra payload which is just skipped in libufodecode (starting with C0)

* Actually, 1 (last) payload is missing for the first two rows. So, total number of payloads is (3840/2) * (640 + 1) - 32

- Limitations

* Due to encoding, ROI should always start at even line and include even number of lines

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