AM2431: Application store data to external flash

Larry Chen

Part Number: AM2431
Other Parts Discussed in Thread: UNIFLASH

Hi all TI experts,

I am currently using our custom board, with the main MCU being the AM2431, and the SDK version is mcu_plus_sdk_am243x_09_01_00_41. The board only has one external flash. I flash the sbl_null onto the board's flash through UART, connect to the AM2431 using the XDS110 debug probe, and run my program in debug mode via CCS.

I want to store some data in the external flash during program execution. In my application's project, I have configured the FLASH settings in syscfg, and saved and compiled it. However, during execution, it crashes at Flash_open() in ti_board_open_close.c. What could be the possible reasons for this issue?

The following is where I paused the program when it crashed.

Best regards,

Larry

over 1 year ago

0 Aakash Kedia over 1 year ago

TI__Mastermind 26145 points

Hi Larry Chen,

There can be many reasons of failure. You need to debug the exact reason yourself. I can provide you an FAQ which walks through the process of developing the flash driver with MCU+ SDK.

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1230063/faq-mcu-plus-sdk-am243x-faq-how-to-debug-develop-migrate-the-flash-driver-for-custom-flash-on-non-ti-evm-ospi-xspi

I hope this helps.

Best Regards,
Aakash

0 Larry Chen over 1 year ago in reply to Aakash Kedia

Prodigy 220 points

Hi Aakash,

After experimentation, I downgraded the SDK version to mcu_plus_sdk_am243x_09_00_00_35, which allowed me to successfully execute Flash_open(). However, I encountered an issue with Flash_write(). After executing Flash_write(), the program jumps to HwiP_data_abort_handler_c() and becomes stuck in an infinite loop.

I did attempt to test the sbl_uart_uniflash example in mcu_plus_sdk_am243x_09_00_00_35, where Flash_open() operates normally. In debug mode, I observed that there were no issues after executing Flash_open(). I tried modifying the syscfg settings of my project for FLASH and OSPI to match those in sbl_uart_uniflash, but the same issue as described earlier still occurs. Could there be other factors causing this problem? Is it possible that it's related to the configuration of linker.cmd or the MPU settings?

best regards,

Larry

0 Aakash Kedia over 1 year ago in reply to Larry Chen

TI__Mastermind 26145 points

Hi Larry Chen,

Did you try the experimentation mentioned above ? Does 1s-1s-1s at the lowest speed works for you ?

Best Regards,
Aakash

0 Larry Chen over 1 year ago in reply to Aakash Kedia

Prodigy 220 points

Hi Aakash,

I discovered that the issue was caused by the configuration of the MPU. I'm not sure if it was due to setting an MPU address to an incorrect location, but the problem was resolved after removing a certain MPU. Thank you for your response.

Best regard,

Larry

Arm-based microcontrollers

Arm-based microcontrollers forum

AM2431: Application store data to external flash