• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 79 subscribers
  • Views 1291 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MSP430FR4133: Launchpad Board Bring-up

Jamil Aryan
Prodigy 100 points

Part Number: MSP430FR4133

Hello,

I recently fabricated this launchpad board with a little bit of modifications, 

Basically, I worked on the original Eagle project for this device & implemented the following changes:

1- Removed Emulator portion of the board, leaving only the JTAG header so that I can hookup emulator from another prefabricated launchpad board through jumper wires. 

2- Modified the LCD (used a bigger LCD requiring a couple of more LCD pins).

3- attached  pins 38-39-40 from MCU to an H-bridge IC for a dc motor control. 

Now when I'm using an emulator from another board by using 2-wire spy bi-wire (GND, 3.3V, 2 wires of SBW) with CCS to load software, the error pops up saying unknown device.

Do I need to dig deeper into learning about the JTAG implementation of TI as there are so many details?

Could we have done something wrong that would burn or permanently damage the on-board MCU?

Am I right by using CCS debug feature to download any software/firmware?

Can you give me any hint about what could have gone wrong assuming that I have already completed visual and electrical inspection of the board. 

Thanks

  • 0
    Guru 102575 points
    General comments:

    "Unknown device" is kind of a catch-all from the programmer meaning "I don't understand what I'm seeing [maybe nothing]".

    When I've seen this when hand-assembling, it has always meant (a) bad solder joint or (b) something with the power. Make sure you've got all the recommended bypass caps.

    If I'm doing this myself, I bring up the MCU separately, with only the required support components, just so I can debug one thing at a time. CCS is fine.

    Despite my clumsiness, I have not yet succeeded in burning up an MCU.
  • 0
    TI__Expert 5260 points

    Hello Jamil,

    Few checkpoints from my side:

    • When you are connecting VCC, TEST,RESET and GND pin for spy bi-wire interface, check VCC... It should remain 3V. Check the Voltage on DVCC vs DVSS pins of MCU.
    • Make sure no components on Test pin.
    • RESET pin should have pull up (say 10K or 4.7K) and once cap with GND. Cap Value must be less than 2.2nF...

    Hope it should solve your issue...

    Regards,

    Vikas Chola

  • 0 in reply to Bruce McKenney
    Prodigy 100 points
    Thanks Bruce your comments were helpful , appreciate it for taking the time.
  • 0 in reply to Vikas Chola
    Prodigy 100 points
    Thanks a lot Vikas, choosing a value less than 2.2nF solved my problem, I can run my program now.

**Attention** This is a public forum