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TCA6424A: EVM Kit for TCA6424A

Mike Doyle
Prodigy 40 points
Part Number: TCA6424A
Other Parts Discussed in Thread: MSP-EXP430G2ET,

Hello...I am evaluating the TCA6424A for use as an LED driver in a new design. I am trying to get the IO Expander EVM and host MSP430 LaunchPad to work. I noticed that I have a Rev 1.0 MSP-EXP430G2ET LaunchPad which is different than the Rev 1.5 shown in the IO Expander EVM instruction guide. Still, I think I identified the jumpers that needed to be changed from their default settings: I switched the UART jumpers and removed the P1.6 jumper. I put the two boards together and connected the USB port to my PC. I ran the IO Expander Flasher.bat file and it fails to find a USB FET. It then finishes with an Exit 11 code, failing to load the 430.

Can anyone tell me if the Rev 1.0 LaunchPad is compatible with the IO Expander EVM? Any other ideas on why this isn't working? Thanks for any help...Mike

  • 0
    TI__Guru 72751 points
    Hey Mike,

    I placed an order for the same EVM as you, it should arrive by the end of the week. I'll take a look and see if I run into the same error (incase it has to do with the MSP launchpad model)

    Thanks,
    -Bobby
  • 0 in reply to BOBBY
    Prodigy 40 points

    Hi Bobby...Thanks for the reply. I'd be interested in your results. You have to order the LaunchPad host board separately and I wonder what revision of that board you will receive. If you get a Rev 1.5 board that will match the EVM instructions and hopefully it will work for you. Mine was a Rev 1.0 LaunchPad and I wonder if that's my problem. Please do keep me posted. Thanks...Mike

  • 0 in reply to Mike Doyle
    Prodigy 40 points

    I need to report some progress and a few corrections to my initial post. First, the LaunchPad board we have is the MSP‑‑EXP430G2ET, not the MSP‑‑EXP430G2. That explains why we have a Rev 1.0 board as the ET is fairly recent. The non-ET board referred to in the IO Expander EVM documentation is obsolete. Hopefully the ET version will work with the IO Expander EVM. We did finally get the correct drivers loaded to talk to the LaunchPad and eventually found the latest and greatest (I think) version of the MSP430 Flasher, v1.3.19. The version referred to in the IO Expander documentation must have been for the older non-ET board and could not set the voltage on the ET LaunchPad correctly. After all this we now have a working LaunchPad and IO Expander. TI should probably update the IO Expander documentation to call out the ET version of the LaunchPad and update all the software in the download package. This shouldn't have taken so long to straighten out.

  • 0 in reply to Mike Doyle
    TI__Guru 72751 points
    Hey Mike,

    Sorry for such a delayed response. I ended up getting notification that the boards were shipped on Friday and ended up getting them 2 days ago (Wednesday). I haven't had time to hook them up and test them (I've been super swamped).

    I'm glad to hear you got the boards working.

    "TI should probably update the IO Expander documentation to call out the ET version of the LaunchPad and update all the software in the download package."
    I'll look to see if I can submit a ticket for this to be fixed.

    Thanks,
    -Bobby