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MSP430I2041: serial port communication issue

Yale Li 李耀先
Expert 4660 points
Part Number: MSP430I2041

Hi Team,

After the device is programmed with firmware, the serial port cannot communicate. It can work normally after replacing the MCU.

At present, nearly 20pcs have the same issue. 

Is the reason of the failure of the serial port related to the unstable baud rate, or the internal clock source circuit of the chip, etc.?

--

Thanks & Regards

Yale

  • 0
    Guru 37305 points

    What "firmware" are you changing?

    What firmware is in the mcu that works?

    We can't tell from the information you have given us. If you can't share your code, at least put a scope on the serial port to see if the baud rate is indeed unstable.

    I suggest you pare your code down to the bare minimum - mainly the initialization section - and see if you can repeat the issue.

  • +1
    TI__Mastermind 18430 points

    Hi Yale,

    1. In your firmware are you programming the serial ports? 
    2. Is this present on every board you are programming?
    3. Are you able to see anything on the serial ports using an O-Scope? try sending bits on the RX to verify that data is getting sent from the device.

    Regards,

    Luke

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