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Original question:

IWRL6432: Increasing the baud rate of the serial connection for flashing.

AWR2944: Flashing at a higher speed than 115.2kBaud

Mike Unger
Prodigy 75 points
Part Number: AWR2944
Other Parts Discussed in Thread: UNIFLASH

Tool/software:

I understand that the ROM based bootloader (RBL) is limited to 115.2 kBaud. However, what about the SBL? Will that run at higher than 115.2 kBaud? Or, can it be modified to run faster?

I know I'm being cheeky but I'd appreciate a full answer rather than "it's not possible".

Thanks.

  • 0
    TI__Mastermind 24185 points

    Hello Mike,

    You can modify it to run at a faster baud rate than 115200.
    If you see our demo application example there, we have configured the baud rate to 3125000 for one of the ports while streaming out data.
    You can take that as a reference and try it out on your end.
    SBL is an application you develop so there is no such limitation if you want to push it.
    We provide the reference for 115200 as that is one of the standard values.

    I hope you are aware that the UART flashing is done by the application called SBL_UART_UNIFLASH.
    SBL_QSPI is what loads the data from flash to the RAM region and executes.

    So, the ROM Bootloader requires the first image that would be your SBL_UART_UNIFLASH, this needs to be streamed at 115200 baud rate.

    After that it is up to your discretion how you want to design your SBL_UART_UNIFLASH application to receive the SBL_QSPI.
    We don't have any reference, but it should be possible.

    Regards,
    Saswat Kumar

  • 0
    Prodigy 75 points

    Hi Saswat,

    Thanks a lot, that is good info.

    Yes, understand that the built-in ROM bootloader is fixed at 115.2kBaud. But, right, as you pointed out if we can design a SBL_UART_UNIFLASH that runs faster which would be, of course, loaded by the ROM Bootloader ... well, that would be great.

    Will look at demo application and what we have now. 

    Won't mark resolved quite yet. Slight smile

    Regards,

    Mike

  • 0 in reply to Mike Unger
    TI__Mastermind 24185 points

    Hello Mike,

    Sure let me know if you have any other questions.

    Regards,
    Saswat Kumar