MCU-PLUS-SDK-AM243X: Some questions about sbl_null.

Hi Seong Chang Kim,

Seong Chang Kim said:

1.  At first, I thought I needed to flash the "am243x-evm/default_sbl_null.cfg" because I used the same ALV model as EVM, but this was wrong.

    Why should I flash "am243x-lp/default_sbl_null.cfg"?

   (When I try to flash only am243x-lp/default_sbl_null.cfg, it flashes normally)

The config contains sbl_uniflash as well as sbl_null image ! The SBL Uniflash is package and flash dependent.

Seong Chang Kim said:

2. Where is sbl_null loaded by the command below?

    I want to know the memory or address that will be loaded, and also how "sbl_uart_uniflash.release.hs_fs.titimage" works (If possible).

    (command : --file=sbl_prebuilt/am243x-lp/sbl_null.release.hs_fs.tiimage --operation=flash --flash-offset=0x0)

https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/latest/exports/docs/api_guide_am243x/EXAMPLES_DRIVERS_SBL_UART_UNIFLASH.html

https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/latest/exports/docs/api_guide_am243x/TOOLS_FLASH.html

Seong Chang Kim said:

3. How different is "sbl_null.release.hs_fs.tiimage" from "sbl_null_am243x-lp_r5fss0-0 example code"?

    Is it the same thing?

Yes, However SBL NULL is basically initialization of the device so users can load the application via CCS for testing.

Best Regards,
Aakash

Hi,

Seong Chang Kim said:

This is an area that has nothing to do with flash memory, but I'm not sure why it's flash dependent.

Why do you say so ? FSS means Flash Sub System Data region.

Seong Chang Kim said:

I want to boot with SPI memory connected to SPI3 as below, is it impossible?

That is not supported. It can only be booted via pads on OSPI interface.

Best Regards,
Aakash