TMS320F280049C: 280049 encrypt DSP program can not read local RAM

Foriner

Part Number: TMS320F280049C

hi , expert

now my DSP have encrypted all flash space and global RAM, but now , i find a piece of program which run in global RAM that function is perform a continuous write to local RAM, but when finished written, all date in local RAM which be written are "0x0000" ,but when i change to continuous write to global RAM is ok

WHY?

over 4 years ago

0 Vivek Singh over 4 years ago

TI__Guru** 115281 points

Hi,

If you have enabled security on device and made local RAM secure then code running from global RAM which is not secure can not have any access to local RAMs.

Regards,

Vivek Singh

0 Foriner over 4 years ago in reply to Vivek Singh

Intellectual 425 points

OK, I have written wrong，all flash banks and local RAM i had enabled security. and the program which written local ram run in global RAM.

now , how can i enable global RAM in security?

0 Vivek Singh over 4 years ago in reply to Foriner

TI__Guru** 115281 points

Global RAMs are not secure resource so you can not enable security on global RAMs.

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TMS320F280049C: 280049 encrypt DSP program can not read local RAM