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AFE4490SPO2EVM: communicate with AFE4490 using serial port

Farzad Samie
Prodigy 170 points
Part Number: AFE4490SPO2EVM
Other Parts Discussed in Thread: AFE4490

During the communication with AFE4490 using the serial protocol, the response received in a format with predefined flags as header and tailer.

What will happen when the payload contains the flag as actual data?

Where can I find the complete documentation about the message communication protocol?

The file 'Message Communication Protocol v4.0' is very brief.

  • 0
    TI__Genius 12575 points

    Hi Farzad,

    As you have observed, for each response we have predefined header and footer.

    So anything that comes in between them is taken as valid data/payload. Since the location of footer is fixed with respect to header any footer flag in between is treated as data.

    Regarding the documentation of protocol, we don't have anything apart from what you have. Are you looking for anything specific?

    Regards,

    Prabin.

  • 0 in reply to Prabin Yadav
    Prodigy 170 points

    Hi Prabin,

    I have some small problems with the received messages from AFE4490.

    First of all, when I send the command to Start Read ADC Register with N samples, the EVM keeps sending data even after N samples. Even sending Stop Read ADC command does not seem to work. The green LED (LED1) remains on.

    Another issue: sending the device identification command does not reply with the right format. Sometimes, I have to run the command 2 or 3 times.