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Scatter file for Cortex-M0 LPC11xx

Ramon Viedma

Hi everybody,

My question is regarding a Cortex-M0 NXP's LPC1114/301.

I am having trouble with the initialization sections that sets the initial values of variables. For example:

int x = 20;

int main(void)
{ if(x==20) do_something();

.....

}

When I run this code, the value of x is undefined and has actually a random value. I know I have to copy the etext section to edata, and also initialize the bss section to 0. But how do I do this in Keil with a scatter file + startup file in assembler? The default startup file from Keil for the LCP1114 doesn't do it...

Thanks in advance,

R.

Parents
  • 0 in reply to John Linq

    > (I think/guess) You don't have to do anything, it is done by KEIL's __main automagically.

    Yeah, that was it!
    I remember getting a "main not found" error and I changed the startup assembler code to call "main" directly, instead of the original "__main".
    But now, for some reason, I am not getting this error, and as a result, the variable initialization is working fine, as it should be.

    Thanks a lot!

    R.

Reply
  • 0 in reply to John Linq

    > (I think/guess) You don't have to do anything, it is done by KEIL's __main automagically.

    Yeah, that was it!
    I remember getting a "main not found" error and I changed the startup assembler code to call "main" directly, instead of the original "__main".
    But now, for some reason, I am not getting this error, and as a result, the variable initialization is working fine, as it should be.

    Thanks a lot!

    R.

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