Put function in RAM

[DGo.1]

Hi,

how can I tell to the compiler that I want a function to be executed in RAM ?

[Tesla DeLorean]

Should be able to use an attribute or pragma to indicate which section a particular function is placed in by the linker. Code in the startup or scatter loader should move the code from ROM into RAM.

It is more of a linker directive than a compiler one.

[DGo.1]

Something like this ? :

#define EXEC_FUNC_ON_RAM __attribute__ ((section(".data")))
 
EXEC_FUNC_ON_RAM void myFunc(int data) {....}

Do I have to modify the linker?

/* Initialized data sections into "RAM" Ram type memory */
 .data :
 {
 . = ALIGN(4);
 _sdata = .; /* create a global symbol at data start */
 *(.data) /* .data sections */
 *(.data*) /* .data* sections */
 *(.RamFunc) /* .RamFunc sections */
 *(.RamFunc*) /* .RamFunc* sections */
 
 . = ALIGN(4);
 _edata = .; /* define a global symbol at data end */
 
 } >RAM AT> FLASH

Also, how do I check if the function in in RAM or FLASH ?

[DGo.1]

Found this; it worked correctly:

just add it before the function declaration:

__attribute__ ((section(".RamFunc")));

[UHjor.1]

But don't add a semicolon in the end! Shall be:

__attribute__ ((section(".RamFunc"))) void some_function() {}

[CLeo.1]

This is been tried, same results

[WojtekP1]

Define section in RAM in linkerscript

use void procedureinram() __attribute__ ((section(".yoursectionname")) {procedure code}

of course it may not be void and may have any parameters.

[CLeo.1]

Just tried that, same results

[CLeo.1]

Ignore this wrong post.