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BQ76PL455EVM: Controlling BQ76PL455EVM with F28379D

YUSUF KARATAS
Intellectual 910 points
Part Number: BQ76PL455EVM
Other Parts Discussed in Thread: BQ76PL455A-Q1,

I am trying to communicate with BQ76PL455EVM and F28379D on Matlab. I am using bq76PL455A-Q1 Software Design Reference document.

What I did is I connected 3.3VDC-GND-TX-RX (250k)-FAULT and WAKE pins.

1. I pulled LOW to FAULT pin.
2. I pulled HIGH to WAKE pin.
3. I sent "89 01 00 0A 00 DA 83" as hex and "137 01 00 10 00 218 131" as decimal.

According to reference document BQ needs to reply that with its address. But I can not observe any signal on TX pin of BQ.

BQ operates well with its own GUI.

What may be wrong? What else I need to do ?

  • 0
    TI__Genius 17370 points

    Hi Yusuf,

    Why are you pulling LOW on the FAULT pin? You should only need to wakeup and send the command. Check that the device wakes up properly by measuring at the LDO pins and then check your commands are sent properly and at the right baud rate using a logic anaylzer and compare to GUI commands. Also only send the hex commands, not decimal format.

    Regards,

    Taylor