CCS/TMS320C6657: Disassembly error

Graeme Parker

Part Number: TMS320C6657

Tool/software: Code Composer Studio

I'm using CCS 7.1.0.00014 and am trying to debug our boot code which is stored in 16-bit NOR flash attached to EMIF16 via CE2 (address 0x70000000).

The disassembly window shows ???? Internal error occurred reading 0x70000080 [code=0x4].

I can single step the code and it behaves normally (registers change as expected etc). It's just that the disassembly window does not show properly.

I've seen another question on the forum from last year that remains unanswered.

Any ideas?

over 8 years ago

0 Yordan Kovachev over 8 years ago

TI__Guru**** 161600 points

Hi,

I've notified the sw team. Their feedback will be posted here.

Best Regards,
Yordan

0 Ki over 8 years ago

TI__Guru**** 472411 points

Hello Graeme,
Are you using a startup GEL file? And what happens when you view that address in the memory view?

Thanks
ki

0 Rahul Prabhu over 8 years ago

TI__Guru** 116770 points

C6657 EVM, doesn`t have a EMIF NOR device. Can you confirm that you are performing this on your own hardware ?

Have you programmed the EMIF NOR using a flashing tool when you perform read operation to verify the image is flashed can you set a break point and see if you can see this memory region. Another reason could be that you are setting the Disasembly view in 32-bit mode. Can you try to do this from memory browser and set the access to 16 bit to see if this works? EMIF16 is a 16 bit bus so 32 bit access may be generating an error.

BTW: there is very useful thread on EMIF16 boot on these family of devices that you can find here:
e2e.ti.com/.../367102

Regards,
Rahul

0 Graeme Parker over 8 years ago in reply to Ki

Expert 1265 points

Yes, I'm using the evm 6657 startup gel file.

The flash data looks fine in a memory view.

0 Graeme Parker over 8 years ago in reply to Rahul Prabhu

Expert 1265 points

The flash data looks fine in a memory view.
I'll try changing the mode to/from 16/32 bits and see what happens.

0 Graeme Parker over 8 years ago in reply to Rahul Prabhu

Expert 1265 points

Oh, and yes, it's our own hardware.

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CCS/TMS320C6657: Disassembly error