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Local variables storage optimization

dhanush nair

Hi ,

I am using ARM Cortex M4 . When I compile my code I get "No space in Execution region with .ANY selector matching section .const data .When I decrease the code size I am able to compile the code properly.I think I am overusing the data section which in my controller is 32KB.

I want to know where are all local variables stored in ARM KEIL IDE.Is it stored in Stack dynamically or stored in DATA memory Statically .

Thanks in advance

Regards,
Dhanush

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  • 0 in reply to dhanush nair

    Your text strings always (!) needs to be stored in the flash. Nothing but what you have in flash survives a power cycle.

    Copying the text strings into a RAM variable will not remove the use of flash. It will just add extra code to do the copying. Any copying still requires a source.

    Switching to the microlib means you get a bit smaller library so there is a bit more code space available for your own program.

    In the end, your program is too large for the processor or for the Keil license.

Reply
  • 0 in reply to dhanush nair

    Your text strings always (!) needs to be stored in the flash. Nothing but what you have in flash survives a power cycle.

    Copying the text strings into a RAM variable will not remove the use of flash. It will just add extra code to do the copying. Any copying still requires a source.

    Switching to the microlib means you get a bit smaller library so there is a bit more code space available for your own program.

    In the end, your program is too large for the processor or for the Keil license.

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