No, unfortunately my issue still goes unsolved. I've re-checked my code and
the outgoing signal on the UART transmit pin, and both look like they should
work fine. I'm currently in the process of converting my code to 8-bit, as I
have an 8-bit demo board that uses a EUSART with very few peripherals
attached. I am hoping that I will be able to see some sort of signal
returned from the camera. You say you have an eval board, have you scoped
the board's transmit signal to the camera? If so, what are you getting? I am
sending a sync signal, followed by a 10 (signifies end of byte).

piecurus wrote:
> 
> Hi. Did you solve your mistake? I have a C628camera module with jpeg
> compressor module and I have the same problem. 
> The camera works fine using the evaluation program.
> I want to interface it with a PIC microcontroller via UART. I explore how
> the UART protocol works with an oscilloscope.  Sending commands via
> HyperTerminal, only one time I was able to read a data string from the
> camera and it used an 0xAA bit string.The UART configuration for sending
> command was 8N1@57600 but HyperTerminal set the UART configuration for
> receiving at 8N2@57600.
> So, I tried to send as acknowledgment signal the 0xAA00D004AA command by
> PIC but the camera does not reply. I am shure that this it the right
> command to use. It is the same string that the evaluation program sends. I
> have no ideas about what's happening.
> Have you an idea?
> Thanks
> 

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