Constant Data Stored and Accessed in Flash Memory

Declare it as "const int Table" instead of "int Table" and in your linker command file point the .const section into flash.

Thanks for the reply.

I tried to implement what you suggested, but it does not work.  I inherited the following linker cmd file.  I pointed const to flash memory in the linker cmd file as you suggested.  What I am doing wrong?

const int Table[10] = { 3, 6, 4, 7, 2, 9, 8, 1, 0, 5 };

int MyFunction (int Index)

{

return (Table[Index]);

}

Here is the linker cmd file:

-stack 090h 

MEMORY
{
    PAGE 0:    /* Program Memory */
      VECS:       org=0000h,        len=00040h       /*   */
      PSWD:       org=0040h         len=00004h       /*   */
      PROG:       org=0044h         len=0FDBCh       /*   */

    PAGE 1:    /* Data Memory    */
      B0B1:       org=0200h,        len=01F0h        /* internal DARAM */
      B2:           org=0060h,        len=0020h        /* internal DARAM */      
      SARAM:   org=0800h,     len=0800h       /* internal SARAM */
}

SECTIONS 
{

        vectors >       VECS          PAGE 0
        PaSsWoRd >      PSWD          PAGE 0

        .text   >       PROG          PAGE 0
        .cinit  >       PROG          PAGE 0
        .switch >       PROG          PAGE 0
        .const  >       PROG          PAGE 0
        .bss    >       B0B1          PAGE 1
        .sysmem >       B0B1          PAGE 1
        .data   >       B0B1          PAGE 1
        .stack  >       B0B1          PAGE 1

        saram1   >      SARAM         PAGE 1
}

Good information.  The example in that app note has the test data defined in assembly code.  I have the test data defined in C code, and is still not working.  Can you help one more time:

#pragma CODE_SECTION (TestValue, "TESTSECT"); /* I also tried #pragma DATA_SECTION (TestValue, "TESTSECT"); */

int TestValue = 0x1234;

int MyFunction (void)

{

int tmpInt;

tmpInt = PFUNC_wordRead(&TestValue);
return (TmpInt);

}

In the linker cmd file I have

MEMORY
{
  PAGE 0:    /* Program Space */
    FLASH:      org=0044h         len=0FDBCh       /* internal FLASH */
...

}

SECTIONS 
{
        TESTSECT >       FLASH         PAGE 0
...

}

The map file indicates the following:

TESTSECT    0    00002880    000001     UNINITIALIZED

The word UNITIALIZED does not appear in the app note example.  Any idea what I'm doing wrong now?

I don't know of any way to do it from C, which is likely the reason the example defines the variables in assembly.  I believe you'll need to do the same.

Okay.  I'll move my table from C to assembly as you suggest.   Thanks for your help!