available memory for application

MIOS programming (Assembler)
1

Hi,

I’m a bit confused about the memory structure in mios/pic.

What is the total amount of memory I can use in my appliation?

what is the code size avaiable?

what is the data size available?

can I put data segments in in the code segments? how?

thanks

nW

2

Hi,

I guess that you are refering to the C wrapper, no? Thats an important detail :wink:

the memory allocation is documented in the project.lkr file. All memory locations which are not protected are free for your application.

Data in code segment: in assembler you would just write the data via “dw” directive into the code memory, and access it via tblrd*+ and TABLAT. In C you have to declare a global array with initial data, e.g.

  unsigned char my_table = {0x01, 0x02, 0x03};

everything else will be handled by the compiler. Further informations about data handling should be available in the SDCC documentation.

Best Regards, Thorsten.

3

Thanks TK.

Well, my questions did come from working with the C wrapper though they might interest asm mios programmers.

Cleared things up I think.

From what I understand we have ~18.9KB for code  (that is a lot) and 879 bytes for data. I’m I correct?

thanks

nW