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Common RAM for bootloader and application.

I am working on a bootloader for lpc11c24 (ARM cortex M0). I want to have a common RAM for the bootloader and application. The RAM should not be erased when jumping to application from bootloader and after a software reset from application. I have done a similar thing in other microcontroller but I could not figure out a way for the same in lpc11c24. Would it be possible using a scatter file? Is there a way for doing it in Keil?

Thanks!

0 Tamiryan Michael over 13 years ago

Yes. You need to place whatever you want to prevent from being set to zero in a variable with a "zero init" attribute, and map that one to an NOINIT region using a scatter file. See your linker manual.
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0 ImPer Westermark over 13 years ago in reply to Tamiryan Michael

Another option is to just tell the project that your chip has less memory than it really has. Then you can reserve a suitable amount that you access with a pointer to a struct.
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0 Amol Khedkar over 13 years ago in reply to ImPer Westermark

Thanks for your suggestions! I could make it work.
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