MCU-PLUS-SDK-AM263X: QSPI ROM Sequence

Dominik Wuest

Part Number: MCU-PLUS-SDK-AM263X
Other Parts Discussed in Thread: UNIFLASH

When booting from QSPI, there is a description of the ROM sequence in the "Technical Reference Manual":

ROM Sequence:
• Command issued by ROM in this mode is 0x6B.
• RBL looks for SBL image at address 0x0000_0000, in case of boot failures due to corrupted image or any
other reason, RBL tries to boot with redundant image placed at address 0x000F_0000.

I tried to change the SBL address to 0x000F0000 without success:

- First I changed the address of the application in the SBL from 0x80000 to 0x100000, the updated SBL worked fine
- Then I flashed the SBL to address 0xF0000
- But as soon as I erase the block on address 0, the system does not boot anymore from QSPI.

Maybe something about the background: I want to use the lower address range of the flash memory for a FPGA configuration. The FPGA is unfortunately very inflexible and also has the start address 0.

Does anyone have any ideas on how to accomplish this?

over 3 years ago

0 Aakash Kedia over 3 years ago

TI__Mastermind 26165 points

HI Dominik Wuest,

Let me replicate the issue internally and ask the experts if I see similar behavior.

Thank you for your patience. We will reach out to you as soon as possible.

Best Regards,
Aakash

+1 Aakash Kedia over 3 years ago in reply to Aakash Kedia

TI__Mastermind 26165 points

Hi Dominik Wuest,

I am not able to replicate this issue, as this is clearly functional on my end.

1. My BOOT MODE on the AM263x-CC is 0010 which is QSPI Boot mode.

2. I programmed SBL null at 0xF0000 offset in the flash. I used UART_UNIFLASH application to do this task.

Follow the steps at this link - https://software-dl.ti.com/mcu-plus-sdk/esd/AM263X/08_04_00_17/exports/docs/api_guide_am263x/TOOLS_FLASH.html

-------------------------------------------------------------------------------------------------------------------------------------------------

# First point to sbl_uart_uniflash binary, which function's as a server to flash one or more files
--flash-writer=sbl_prebuilt/am263x-cc/sbl_uart_uniflash.release.tiimage

--file=sbl_prebuilt/am263x-cc/dummy.bin --operation=flash --flash-offset=0x0

# When sending bootloader make sure to flash at offset 0x0. ROM expects bootloader at offset 0xF0000
--file=sbl_prebuilt/am263x-cc/sbl_null.release.tiimage --operation=flash --flash-offset=0xF0000

------------------------------------------------------------------------------------------------------------------------------------------------

Can you double check the openssl version at your end ? It should be 1.1.1k

Hope this information resolves the issue.

Best Regards,
Aakash

0 Dominik Wuest over 3 years ago in reply to Aakash Kedia

Prodigy 180 points

Hi Aakash

Thanks for your help. I try to replicate and double check everything and give a feedback as soon as possible.

I used an AM263x-LP with bootmode 0000, but this should make no difference?

Best regards

Dominik

0 Aakash Kedia over 3 years ago in reply to Dominik Wuest

TI__Mastermind 26165 points

Hi Dominik Wuest,

https://software-dl.ti.com/mcu-plus-sdk/esd/AM263X/08_04_00_17/exports/docs/api_guide_am263x/EVM_SETUP_PAGE.html#BOOTMODE_QSPI

The Bootmode QSPI is suppose to be as mentioned in the link above which is 0010 for AM263x-CC and 1101 for AM263x-LP.

IMO, 0000 is not a valid boot mode.

Please follow the steps as mentioned in the MCU_PLUS_SDK documentation and let us know if there are any missing links.

Best Regards,
Aakash

0 Dominik Wuest over 3 years ago in reply to Aakash Kedia

Prodigy 180 points

Thanks for the link. I will check the dip switches. According BOOTMODE Pin Mapping in the Technical Reference Manual (spruj17b, 5.3.1) 0000 should be QSPI Quad Read Mode.

0 Dominik Wuest over 3 years ago in reply to Aakash Kedia

Prodigy 180 points

Hi Aakash

It's working now. My fault was to place the application to address 0x100000. The size of the SBL is larger than 0x10000 which causes an address range overlap. Startup works with Bootmode 1101 and 1111 (dip switch position).

Thanks for your help.

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MCU-PLUS-SDK-AM263X: QSPI ROM Sequence