topic liner error in CodeWarrior for MCU

liner error

Seitec — Mon, 23 Feb 2009 02:51:23 GMT

Hello

I have problem with my program. If I would like compile my program, Linker show error.

Symbol _FSFLOAT

Symbol _FMUL

Symbol _FSTRUC

Symbol _FDIV

/*MEM hlavickovy soubor*/
#ifndef _MEM_
#define _MEM_

#define F_OSC 16
#define F_BUS 8
#define T_BUS .125

int Initi(int);

#endif

/*mem.c */
#include "eeprommm.h"
#include <mc9s12dp256.h>
#pragma LINK_INFO DERIVATIVE "mc9s12dp256b"

int Initi(int oscclk){
unsigned char prdclk;
float eeclk = 0;
int pom = 0;

ECLKDIV_PRDIV8 = 0;

if(oscclk >=12){                      /*MHz*/
    ECLKDIV_PRDIV8 = 1;
    prdclk = (unsigned char)(oscclk/8);
}else{
    prdclk = (unsigned char)(oscclk*(5+.125));
}

pom = (int)(oscclk*(5+.125));
ECLKDIV_EDIV = (unsigned char)pom;
eeclk = 2/(1+pom);

if((((1/eeclk)+T_BUS) >= 5) && (eeclk > .15)){
    return 0;                                             /*ok*/
} else{
    return 1;                                             /*bad*/
}
}

Re: liner error

CompilerGuru — Mon, 23 Feb 2009 03:11:04 GMT

Try searching the forum, for example

http://forums.freescale.com/freescale/board/message?board.id=16BITCOMM&message.id=2244

Basically the project links against the integer only ANSI library therefore the floating point runtime support routines are not available.

Alternatively you might change the source code not to use floating point calculations. For example instead of

> prdclk = (unsigned char)(oscclk*(5+.125));

You get the same result with

prdclk = (unsigned char)(((oscclk*5125uL)/1000));

prdclk = (unsigned char)(((oscclk*41uL)/8)); // * (5+.125)

I used long, maybe int arithmetic is enough.

Either way, both long and int arithmetic are a lot faster and shorter than using floating point.

Daniel

Re: liner error

Seitec — Wed, 25 Feb 2009 16:49:09 GMT

Great. It works thank you very much.