Code Composer 5.1 TMS320 non volatile ram

Michael Luciano

Prodigy 70 points

Trying to configure linker file for non volatile ram, ram when power is applied, non-volatile when not (retains).

Used this in the SECTIONS to keep from zero filling at run time

NVSRAM > NVSRAM_MEMORY, type = NOINIT

However when loading from an emulator, the (ram) is zero filled.

tried NVSRAM > NVSRAM_MEMORY, type = NOLOAD

to keep from zero fill on load, but then run time it zeroed it.

How can I do both, basicaly make it keep anything from writing to it execpt the actual code.

Thanks,

over 13 years ago

0 Derek Belle over 13 years ago

Intellectual 505 points

I am not sure that there is non-volitile RAM on the C2000?

Do you mean that you want to run your code out of flash? ie: Non-Volitile.

There is a wiki page about this here:http://processors.wiki.ti.com/index.php?title=C2000_Flash_Common_Issues/FAQs

0 Michael Luciano over 13 years ago in reply to Derek Belle

Prodigy 70 points

This is an external chip to the processor, it detects if power if failing and stores its ram to internal flash, then when power is reaplied copies its internal flash back to user ram. This is why I don't want the code to muck with it.

0 Lori Heustess over 13 years ago in reply to Michael Luciano

TI__Guru* 92790 points

I'm not sure why it is getting cleared out. The C2000 compiler doesn't int anything unless assigned a value in the code, or via a fill value in the linker command file. How is it defined in the code?

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C2000 microcontrollers forum

Code Composer 5.1 TMS320 non volatile ram