TMS320F28388D: CM boot from flash not working as expected.

Frenk Oeseburg

Part Number: TMS320F28388D
Other Parts Discussed in Thread: C2000WARE

I have a application that uses CPU1 and the CM. When debugging both cores in code compose studio (CPU1 not in charge of booting CM in this case) the code on CM runs as expected. (First run CPU1, and then start CM).

But as soon as I run from flash and CPU1 releases the CM from reset, the CM ends up in a hard fault.

Due to the code working when it is starting in debug mode, I have a feeling the boot ROM has something to do with it. Is it possible to step through the boot ROM code in code compose studio to see what is happening? Or are there any recommendations to find out what is exactly happening?

over 2 years ago

0 Hareesh Janakiraman over 2 years ago

TI__Guru* 95315 points

Frenk,

In general, if there is a difference in behavior between running a project with the debugger connected versus running it in standalone mode, it points to the presence of initialized constants in RAM, (which get loaded with the debugger connected but not without).

You can load the symbols for the boot-ROM source and then single-step through the source. You can find the symbols source from directories such as C:\ti\c2000\C2000Ware_5_01_00_00\libraries\boot_rom\f2838x\revA\rom_sources\cm\ccs_files\Release.

These 3 posts may give you some insight:

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1118583/tms320f28388d-jumping-from-bootloader-to-app-works-on-debugger-but-doesn-t-work-when-booting-from-flash

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/931369/ccs-tms320f28388d-boot-from-flash-not-working-after-power-cycle---peculiar-issue

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/935331/ccs-tms320f28388d-boot-from-flash-not-working

These posts also refer to similar posts that may help you. Please take a look at the posts under the "Similar Topics" section on the right side of the screen.

0 Frenk Oeseburg over 2 years ago in reply to Hareesh Janakiraman

Prodigy 80 points

Thanks for the pointers. As it turns out it was my stack-pointer that was not written correctly to the SP register at program start.

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TMS320F28388D: CM boot from flash not working as expected.