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Boot mode options for AM335x eval board

Chris Wilson
Intellectual 340 points


Does anyone know the location of the information for the boot mode options for the AM335x eval board? I'm particularly intereset in the UART boot mode.

Thanks

Chris

  • 0
    TI__Expert 6655 points

    Hi Chris,

    Can you go through this link?

    http://processors.wiki.ti.com/index.php/AM335x_U-Boot_User%27s_Guide#Boot_Over_UART

    Regards

    AnilKumar

    Please mark this Forum post as answered via the Verify Answer button below if it helps answer your question.  Thanks!

  • 0
    Intellectual 460 points

    Hi Chris,

    To select the boot mode, you can change the sysboot <4..0> straps on EVM board. Details on possibilities are given in the Technical Reference Manual (table 26-7).

    I’ve tested the “BOOT on UART”. It works fine on EVM board.

    You just need to connect a terminal, supporting xmodem and zmodem protocols (e.g. Tera term), on the EVM board. The terminal will prompt a series of ‘C’ to ask for the first loader. You need to transfer u-boot-spl file. Then terminal will prompt for the second part of the u-boot (in z-modem if I remember well). And finally u-boot will be run.

    Information (like configuration for the serial link) are given in the Technical Reference Manual and may be in the wiki.

    Good luck ;-)

    Cyril

  • 0 in reply to Cyril BEGUET
    Intellectual 340 points

    Hi Cyril

    Thanks for the information.

    I was trying to run the Starterware downloading the boot.bin file which appeared to work with the following response:

    CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCStarterWare AM335x Boot Loa
    der

     Unable to open application file
    Jumping to StarterWare Application...

    I could not then download the app.

    Maybe I'll try uboot - where did you get the uboot file from?

    Thanks

    Chris

  • 0 in reply to Chris Wilson
    TI__Intellectual 2150 points

    Also, the EVM Hardware User's Guide shows more information on the SYSBOOT DIP switches on the GP EVM.  See the section Configuration/Setup.

    Damon

  • 0 in reply to Chris Wilson
    Intellectual 460 points

    Hi,

    I don't use the Starterware. But I don't think that you can use the same file to boot from SDcard or from UART0. I think (but it's just an hypothesis) that the starterware bootloader will look for the "application" on the SDcard. If you don't have one, you can't load the application :(. May be you can configure the bootloader to get application from UART.

     

    To get u-boot, you have to use one of the SDK (Linux or Android) : http://processors.wiki.ti.com/index.php/AM335x_Software_Design_Guide

     

    Regards