Error [1300] stack frame too large

[lopex]

stack frame too large

Hi,

I believe that this matter has already been spoken.
I want a big vector unsigned char [50][10]={{0,1,2},{0,2,6}};
This vector is constant.

This is for PIC18F4520, C18

Thanks,

lopex

 

[cristi7521]

error [1300] stack frame too large

Hi,
Your vector is not define like constant.
Which compiler?

 

[GSM Man]

[1300] stack frame too large

You didn't say how you were declaring this, or if you intended it to be a constant or not. However, the Stack error would indicate you declared it as a local function variable (not constant). To fix that problem add the 'overlay' keyword to your declaration:

    overlay unsigned char big_vector[50][10]={{0,1,2},{0,2,6}};

 

[Kurenai_ryu]

stack frame too large c18

If its constant, it should be:

rom unsigned char [50][10]={{0,1,2},{0,2,6}};

or

unsigned rom char [50][10]={{0,1,2},{0,2,6}};

sorry I'm not at work to check it correctly...

char [50][10] are 500 bytes, and in a PIC18 all ram banks are 256 bytes... so if you want that vector in ram you must "fuse" to banks (with the linker script and the #pragma data) there are lots of examples ot doing that...

 

[lopex]

c18 stack frame too large

Thanks,
With a

#pragma romdata bigvector

and

rom unsigned char vector [50][10];

I made it resolve the problem.