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DLPC900: Error descriptive string doesn't match expectation

Robocop
Prodigy 70 points
Other Parts Discussed in Thread: DLPC900

I am currently working with a DLPLCR6500EVM, the communication is done via I2C.

Sending the command 0x32 (USB counterpart: 0x0100) tells me, that the system is currently free of errors. With command 0x33 (USB counterpart: 0x0101) I am trying to extract the error string, which should be something like "No error" (as denoted in table 12 in the Programmer's Guide) or similar. But I get no description at all. In fact, it looks like the very first character of the response is the "0x0" termination byte. Could someone from TI (or anyone else with a running I2C communication) please check this? Not sure, whether its a bug in my implementation or in the DLPC900 firmware...

Thanks
Robert

  • 0
    TI__Mastermind 30875 points

    Hello Robert,

    For, No Error condition the DLPC900 firmware is returning 0x00. Not the error string "No Error".

    You can either not read the error string if the I2C:0x32 command says 0x00. i.e. NO ERROR occured.

    OR

    You can treat the response for I2C:0x33  USB:0x0101 command  for NO ERROR as string with just 1-byte 0x00.

    Regards,

    Sanjeev

  • 0 in reply to Sanjeev
    Prodigy 70 points
    Hello Sanjeev

    thanks for replying. So, in the end, the result is correct and not a bug in my implementation. Strange though...

    Other question: Do error strings correspond somehow to the error descriptions of table 12 in the Programmer's Guide?
    Or are these completely different?

    Regards,
    Robert
  • 0 in reply to Robocop
    TI__Mastermind 30875 points
    The error strings exactly match to Table #12.

    New Error code being added in the next firmware version v2.0, Error Code 17. for command USB:0x1A39 I2C:7F, this will return error is the user provided index cannot be decoded to proper address on the flash for downloading the image.

    Regards,
    Sanjeev'