topic Re: #pragma CODE_SEG no effect in 8-bit Microcontrollers

#pragma CODE_SEG no effect

DavidoBG — Fri, 07 Nov 2008 23:15:17 GMT

I would like write my application SW between E000->F7AD and the bootloader application between F7AD->FFAD. So i modify prm file like this:

/* This is a linker parameter file for the mc9s08qe8 */

NAMES END /* CodeWarrior will pass all the needed files to the linker by command line. But here you may add your own files too. */

SEGMENTS /* Here all RAM/ROM areas of the device are listed. Used in PLACEMENT below. */
    Z_RAM                    = READ_WRITE   0x0060 TO 0x00FF;
    RAM                      = READ_WRITE   0x0100 TO 0x025F;
    ROM                      = READ_ONLY    0xE000 TO 0xF7AD;
    BOOTLOADER               = READ_ONLY    0xF7AE TO 0xFFAD;
    ROM1                     = READ_ONLY    0xFFC0 TO 0xFFCD;
/* INTVECTS                 = READ_ONLY    0xFFCE TO 0xFFFF; Reserved for Interrupt Vectors */
END

I put in my .c file

#pragma CODE_SEG

Bootloader SW

#pragma ROM

But when i open my .s19 file, the data position begins 0xE000 to E150 (150 Bytes is sizeof all code). I would like see

0xE000->E100 (100 bytes size of application SW )

and

0xF7AD->0xF7FD (50 bytes size of bootloader SW )

Do you have any idea my issue? i use MC9S08QE8

Thanks David

Re: #pragma CODE_SEG no effect

CompilerGuru — Sat, 08 Nov 2008 00:01:15 GMT

One thing which comes to my mind is that the entry point of the application (INIT in prm, defaults to _Startup) is moved into a special section, not sure out of my mind what the section name is, I guess .init (there is also a synonym with no dot).
In this case, try:

Code:

> .init, BOOTLOADER               =  READ_ONLY    0xF7AE TO 0xFFAD;

Daniel

Re: #pragma CODE_SEG no effect

erooll — Sat, 08 Nov 2008 05:36:18 GMT

Hi, your prm looks good, but try to do this: In you prm add in PLACEMENT section a entry like this

PLACEMENT
.
.
.
BOOTLOADER_CODE INTO BOOTLOADER;

END

and in your .c do this:

#pragma CODE_SEG BOOTLOADER_CODE
Bootloader Sw
.
.
.
#pragma CODE_SEG DEFAULT

if you have a header file when are declarated your function, you need also put pragma statements to enclose function declaration

Check placement of your function in file .map of the project

Re: #pragma CODE_SEG no effect

DavidoBG — Wed, 12 Nov 2008 16:19:41 GMT

It's OK with into to placement section

Thanks very much

David