how to declare non-initialized variables (MPC5567)

[Oliv74]

Hello,

In my current project, I'm using a non-volatile battery backed SRAM, and now, I would like to declare variables that will be placed in that memory but that will not be initialized to zero at init.

In my lcf I added a memory section like that:

MEMORY{...    saved_ram:          org = 0x20000000,   len = 0x00020000...}SECTIONS{GROUP : {       .dataSavedRam  : {}    } >}

 and in my code:

#pragma push#pragma section data_type ".dataSavedRam" ".dataSavedRam"#pragma pop__declspec(section ".dataSavedRam") int savedVarExample;

But during startup my variable is initialized to 0 in the function __init_data (in __start.c).

So, what is the best solution to avoid that?

thank you.

[CrasyCat · Accepted solution]

Hello

In fact you need to modify the function init_data.

Look for FAQ-27500 on www.freescale.com. This should provide you some insight on how to implement that.

CrasyCat

[Oliv74]

Hello,

Thank you, it works fine now.