RTOS/TMS320C6678: Internal exception, Instruction Fetch Exception, Opcode Exception

Johanna Rivera

Part Number: TMS320C6678
Other Parts Discussed in Thread: SYSBIOS

Tool/software: TI-RTOS

Hello,

I'm running into an intermittent crash on core 0. I'm usually able to replicate the crash on power up and once the DSP crashes with this exception it does not recover (it takes a power cycle to get it out of this failure state). The crash seems to be happening in the Release configuration only.

The NRP points to ti_sysbios_family_c64p_Hwi_int14.

pdk_C6678_1_1_2_6

bios_6_37_04_32

over 6 years ago

0 Yordan Kovachev over 6 years ago

TI__Guru**** 161600 points

Hi,

Are you running your app on TMDSEVM6678? Or is this a custom board?
If you use a custom board, have you verified it with the board diagnostics: ~/ti/pdk_c667x_2_0_10/packages/ti/board/diag to verify the clocks and proper booting of your board with the GEL files?

Best Regards,
Yordan

0 lding over 6 years ago in reply to Yordan Kovachev

TI__Guru* 95265 points

Hi,

What is hooked to ti_sysbios_family_c64p_Hwi_int14? Do you have DSP L2 EDC enabled (if yes, can you disable it and try)? You may look at www.ti.com/.../sprugh7.pdf to decode some registers. and also this thread e2e.ti.com/.../619392 for a similar issue. Check IERR, NRP, B3 with your assembly code

Regards, Eric

0 Johanna Rivera over 6 years ago in reply to lding

Prodigy 50 points

Disabling EDC solves the issue. I think the bootloader is enabling EDC and not doing the proper startup steps.

Thanks!

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RTOS/TMS320C6678: Internal exception, Instruction Fetch Exception, Opcode Exception