• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 2 answers
  • Subscribers 98 subscribers
  • Views 1068 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.

DRA821U: Modify UBOOT Baud Rate

Roberto Masi
Prodigy 70 points
Part Number: DRA821U


Hello,

is it possible to modify the default UBOOT  UART baud rate of 115200 in order to download in a faster way tispl.bin and u-boot.img at a faster rate 921600bps for example?

Regards

Roberto

  • 0
    TI__Guru**** 164790 points

    Roberto,

    UART is typically the slowest. Don't you have an option for any other boot mode other than the UART boot mode?

    Example: eMMC, SD, OSPI, DFU?

    - Keerthy

  • 0
    Prodigy 70 points

    I need to boot up the board in order to flash emmc and ospi. Unfortunatelly dfu is not an option inside my system.

    Is it possible to compile UBOOT in ordet to use the UART at higher data rates?

    I have seen in the reference manual that tha HW is capable to do it, but I think that the standard UBOOT configuration uses standard ns16550 drivers that are limited to 115200bps. I tried to modify dts files but Í had no success, maybe I need some modification in UBOOT configuration or in the source code.

    Roberto 

  • 0 in reply to Roberto Masi
    TI__Guru**** 164790 points

    Roberto,

    RoM code does not support higher Baud so that is one issue. And it's likely to hit FIFO overflow errors as bootloader does not use or support HW flow control.
    Hence higher baud is not recommended.

    Hope it is clear. If no further questions then please click on verify answer.

    Best Regards,
    Keerthy

  • 0 in reply to Keerthy J
    Prodigy 70 points

    Hi Keerty,

    i know that ROM code does not support higher baud rates, but I hoped that i can modify it in tiboot3.bin in order to load in a faster way tispl.bin and u-boot.img.

    Is it possible?

    Regards

    Roberto

  • 0 in reply to Roberto Masi
    TI__Guru**** 164790 points

    Roberto,

    Since U-Boot/SPL does not use or support HW flow control it is likely to hit overflow conditions. In a nutshell higher baud is not tried and recommended on U-Boot.

    Regards,
    Keerthy