How to place a group of variables into specified RAM section

yizhou — Mon, 05 Jun 2017 09:16:09 GMT

Dear，

My target is to place a group of variables into specified RAM section.

I updated the LCF file like:

internal_ram: org = 0x40000000, len = 0x00013000

calcram: org = 0x40013000, len = 0x00001000

and add section:

/calbiration section/

.calc_symbols(NOLOAD) : {

. = ALIGN(4);

*(.calc_symbols)

. = ALIGN(4);

} > calcram

the global varible is declared as:

__attribute__ ((section(".calc_symbols"))) uint16_t TaskTick;

but the CodeWarrior always reports an error:

section '.calc_symbols' must have an uninitialized data section for object 'TaskTick'

In fact, I prefer to use #pragma command to specify data section or code secton for some variables or functions.

I believe codeWarrior can support it, but how to use it? And where to find a helpful document on NXP website?

Thanks and BR

Zhou Yi

CellPhone: +86 189 51964529

CT DD DS AA CN NJ

Original Attachment has been moved to: OldCCP.zip

Re: How to place a group of variables into specified RAM section

martin_kovar — Tue, 06 Jun 2017 08:25:45 GMT

Hello,

please check the example in the post attachment. Check mainly linker file and main.c file.

If you have any other questions, please feel free to write me back.

Regards,

Martin