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BQ79600EVM: Sample code do no Wakeup to BQ79616 Stack

Roland Keller
Prodigy 55 points
Part Number: BQ79600EVM
Other Parts Discussed in Thread: BQ79616, CODECOMPOSER, , USB2ANY, TMS5701224, BQ79600-Q1

Hi,

one month ago, I got the BQ79600 including a five device stack of BQ79616 running. I had the chance to investigate a lot of functions now with the BQ AutoEvalSoftware connected to USB to any.

Old Thread:

BQ79616EVM-021: BQ79616 communication problems between IC with EVM

So now I want to switch to the µCotroller Board without using BQAutoEval GUI.

And now I have a new Communication problem using the BQ79600_UART_Sample_Code_1.0

The Boards are conencted together as in the description sluuc57a.pdf Page 11/25

I installed CodeComposer  Version: 12.2.0.00009 and imported the BQ79600_UART_Sample_Code_1.0 from the MySecure Software Version 18-Aug-20

 

So now I changed the settings for a five Board Configuration

I also tried to change the Sillicon Version to A0, no impact.

Here a view of the setup:

With BQAutoEval:

Setup Changed to 

 BQ79600EVM and TMS570 LaunchPad connection

The readout are all ZERO. The Board Stack does not wake up!

So a look to the RX pin of the BQ79600 Board is showing the same behaviour of Sample Code and BQAutoEval GUI for the Wakeup.

BQAutoEval Wakeup 2x  approx 2,8ms 

UART Sample Code 2x  approx 2,8ms   But with this Stack does not wake up

What can I do to understand the Issue, and force the Stack to wake up?

  • 0
    Prodigy 55 points

    Additional Information:
    The BQ79600 Chip does not trigger the output COMH COML pins  but VIO is 3,3V

    Any Ideas why there is no output of the BQ79600 Chip even with an RX input signal, when unsing the Sample code?

  • +1
    TI__Intellectual 860 points

    Hi Roland,

    When you run the sample code, do you  see BQ79600 wakeup ?.  From the pic you shared, I see you are connecting TMS570 to BQ79600 correctly, but i see there is no power supply for BQ79600. In addition to VIO input from TMS570 to BQ79600, additional power supply of 12V should be provided to BQ79600 similar to how it's done when you connect the USB2ANY. 

    If the connection is proper and if you still see the issue, kindly  capture the UART logs ( probing RX & TX ) using logic analyzer  and share with us.

    Regards,

    Ravi

  • 0 in reply to Ravichandra Sereddy Thipperudra Reddy
    Prodigy 55 points

    Hi Ravi,

    I have not connected a powersupply to the BQ79600 Board. On the manual there is no description for that. If you take a look to the PDF you can read:

    • Ensure that J6 jumper on BQ79600EVM is connected in position 1-2 (default) to connect 3.3-V supply from the LaunchPad to BQ79600-Q1 VIO pin. TMS5701224 microcontroller does not support 5-V option, therefore avoid powering VIO pin with 5 V when connecting to the LaunchPad................By default, the TMS570 LaunchPad is powered by the USB port on the host computer.

    So i assumed that there is no need for external powering needed. 

    I dont want to damage the BQ79600

  • 0 in reply to Roland Keller
    TI__Intellectual 860 points

    Hi Roland,

    As shown in the below picture make sure the J1 and J3 are set for 12V and provide 12V supply to BQ79600. With this you should be able to communicate with BQ79600. Please try this 

    Regards,

    Ravi

  • 0 in reply to Ravichandra Sereddy Thipperudra Reddy
    Prodigy 55 points

    Hi Ravi,

    Tanks for guiding me to apply the 12V. But can you please advice that this hint should be written onto the usermanual like sluuc57a.pdf Page 11/25.

    So only applying 5V will damage the BQ79600, not the 12V...

    That will help a lot of people in the future, when its clear, how to handle

    Thanks 

  • 0 in reply to Roland Keller
    TI__Intellectual 860 points

    Hi Roland,

    Thanks for your comments. If you set J1 and J3 for 5V, you should be able to use 5V (connected to 5V pin) as supply for BQ79600. The document gives details on how to connect TMS570 and BQ79600 and no explicit mention about the  power supply for BQ79600/BQ79718 . We will review the user manual and update it accordingly.

    Regards,

    Ravi

  • +1 in reply to Ravichandra Sereddy Thipperudra Reddy
    Prodigy 55 points

    Hi Ravi,

    I removed J1 and J3 Jumper and connected the 5V pins (each of them Pin3) to the M_5V Pin of the Header from the TMS570 Board.
    So the BQ79600 is running with 5V from the USB of the TMS570 Board. No additional Powersupply is needed to power the BQ79600 Board.

    But it seems there is no  simple Jumper to power the BQ79600 Board by the 5V of the TMS570 Power. That would be nice if you plan a redesign some day.