28335:All internal RAM-68K bytes can be used as code section?

decai wang

Hi,Sir!

The total size (Code size and data size) of my project is less then 68K bytes, so I want to load all code from flash memory into internal RAM. is it OK? how to deal with secure zone and non-secure zone?

over 12 years ago

0 David M. Alter over 12 years ago

TI__Guru 61235 points

There is no reason you cannot do this. Not sure I see much advantage to putting everything in RAM though. I'd think copying just your main code routines would be enough. Leave the initialization code alone in flash. I mean, what are you concerned about with the flash? Execution speed?

Yes, you will need to be careful about secure and non-secure memory, IF you enable the CSM module. Most of the internal RAM is non-secure, so you could only protect a small piece of your code anyway. All the other code would be in non-secure RAM, and could not access data in any secure memory.

Chapter 4 of appnote SPRA958 should help with the flash to RAM copy.

http://www.ti.com/mcu/docs/litabsmultiplefilelist.tsp?sectionId=96&tabId=1502&literatureNumber=spra958l&docCategoryId=1&familyId=1414

Regards,

David

0 decai wang over 12 years ago in reply to David M. Alter

Expert 1590 points

Running in internal RAM is more faster than in Flash, because my code is very time critical, 10us loop control for digital power.

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28335:All internal RAM-68K bytes can be used as code section?