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Original question:

BQ4050EVM-561: BQ4050EVM-561

BQ4050EVM-561: bq4050

Rahul Kumar92
Intellectual 415 points
Part Number: BQ4050EVM-561

We are drop this project just because of Data flash read and write problem and going in loss too.

Thanks for the support.

Regards

Rahul Kumar (VNL)

  • 0
    TI__Mastermind 42535 points
    Rahul,

    We are sorry to know about this. In our PMs I had made clear that the packet checksum was the standard SMBUS checksum. The fw developers that I contacted instructed me to inform you to refer to the spec. I don't know what else I could have possibly told you. I will still try to get what information you asked of us today. If something is salvageable, we will try to help you out the best we can.
  • 0 in reply to Batt
    TI__Mastermind 42535 points
    You were only clear about what you wanted yesterday. the checksum you are referring to is the PEC on smbus, it is calculated per here, www.ti.com/.../slua475.pdf. However, TI fuel gauges use a hw PEC lookup.

    SMBus 1.1 and later define optional Packet Error Checking (PEC). In that mode, a PEC (packet error code) byte is appended at the end of each transaction. The byte is calculated as CRC-8 checksum, calculated over the entire message including the address and read/write bit. The polynomial used is x8+x2+x+1 (the CRC-8-ATM HEC algorithm, initialized to zero).