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Connecting BQ76PL536EVM with MSP-EX430F5529LP using sample code

Chintan Pathak4
Intellectual 845 points
Other Parts Discussed in Thread: MSP430F5529, BQ76PL536, BQ76PL536A, MSP-TS430PN80USB

Dear Forum, 

In trying to make my BQ76PL536EVM talk to a microcontroller, I found the TI application report - SLAA478 - "Multi-cell Li-Ion BMS using MSP430F5529 and bq76PL536", which describes the connections and a code sample to be run on the micro-controller for communication. 

Now, I ordered the MSP-430 Launchpad (MSP-EX430F5529LP), with the same microcontroller. Will this board work with bq76PL536A ?

To try on my own, I built the provided code in CCS, and uploaded it to the device. I have not been able to figure out what to do next. I opened 'putty' (hyperterminal alternative) and observed all the available COM ports, but found no communication. I also tried the same from within CCS and still no results. (i am expecting that the sample should print battery status)

The launchpad is working fine as I ran the "blink" example and it worked. I also installed MSP ware and USB drivers, so the launchpad populates three COM ports as shown in the attached image.

The battery monitor is working fine, as I tested it with Aardvark adapter and then use a power supply (in place of batteries) to connect across Pins 1 and 7 of the first chip only. 

Any directions related to the issue are greatly appreciated. 

Thanks 

Chintan Pathak 

Research Scholar,

University of Washington

  • 0
    TI__Genius 10785 points

    Chintan,

    SLAA478 is proven solution. We haven't used launchpad but I don't see why it shouldn't work.

    We have separate application supports for MSP430 related topics. I think you may get better responds from MSP430 application team.

    Please let me know if you can't find the MSP430 Forums.  Search for MSP low power forums.

    Let us know if you have PL536 related questions.

  • 0 in reply to Roger Hwang
    Intellectual 845 points

    Thanks for your guidance Roger, I headed to the MSP430 forum, and I am trying to get them talking. I eventually ended up ordering the MSP-TS430PN80USB board as required in the App report. And here are the proceedings on the MSP430 forum:

    I want to repeat the last question posted there, as it is a BQ76 question - which is ... Do I need to remove the pull-up resistors R60, R53, and R49 near the P5 10-pin header on BQ76 EVM for it to communicate with the MSP430 ? I know the app-report says so, I just wanted to confirm as Daniel is still checking it thr.

  • 0 in reply to Chintan Pathak4
    TI__Genius 10785 points

    Yes, try without those 3 pull ups.