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Placing variables in different memory section in keil v5( arm compiler 6)

MAHESH GONESANI

HI

I want to place:

  • All static variables into a custom RAM section (e.g., .my_data)

  • All code, including static functions and global functions, into a custom code section (e.g., .my_text) using memory mapping concept of AUTOSAR

These is my source file code (.c):

#define START_SEC_VAR
#include "MemMap.h"


static uint8_t counter1 ;
static uint8_t counter2;


#define STOP_SEC_VAR
#include "MemMap.h"

#define START_SEC_CODE
#include "MemMap.h"

/* Static function */
static void countInc(void)
{
counter1++;
counter2++;
}

/* Global function */
void Process(void)
{
countInc();
}

#define STOP_SEC_CODE
#include "MemMap.h"

This is MemMap.h file(.h):

#ifdef START_SEC_VAR
#undef START_SEC_VAR
#pragma section ".my_data"
#endif

#ifdef STOP_SEC_VAR
#undef STOP_SEC_VAR
#endif

#ifdef START_SEC_CODE
#undef START_SEC_CODE
#pragma section ".my_text"
#endif

#ifdef STOP_SEC_CODE
#undef STOP_SEC_CODE
#endif

Constraints:

  • I do not want to modify the .c files.

  • I’m using Keil v5 with ARM Compiler 6, so #pragma arm section is not supported. I need to make changes in MemMap.h file only.

  • I had also tried with  
    __attribute__((section(""))) too, it was compiled but the variables not at the specified memory section.

What i tried:

  • Used .ANY in .sct, then replaced with *(.my_data) but still got no match warning.

  • Verified that static variables and functions work fine in their default sections.

Let me know if any further details are required.

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