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Original question:

AM6442: SBL support NOR Flash 256MB

IWR1642: SBL

Cai Jianlong
Prodigy 40 points
Part Number: IWR1642

HI,

  When I used SBL to implement online upgrade of UART, when I changed baud rate to 921600, the updated firmware was lost after power failure and restart. However, if the baud rate is changed to 115200, it can be used normally. Why and how to modify it?

  • 0
    TI__Mastermind 23570 points

    Hello

    Can you please help us understand how and where did you change the frequency.

    Which SBL release did you use.

    Confirm the activity on  QSPI  for write to flash.

    is the issue for flash read or write.

    Thank you

    Vaibhav

  • +1 in reply to Vaibhav Mahimkar
    Prodigy 40 points

    Hello

     SBL in MMWAVE_SDK_03_03_00_03 is used.

    Change the baud rate of the UART to 921600 in the transport.h file.

    If the baud rate of the serial port is changed to 921600, the radar of the firmware just updated runs normally, but the firmware is lost after the power failure and restart.

    If the baud rate of the serial port is changed to 115200, the serial port works normally even after a power failure and restart

    Thank you