Hiware and compiler problem!

[marcosarti29]

Posted on July 31, 2007 at 19:41

Hiware and compiler problem!

[marcosarti29]

Posted on July 28, 2007 at 10:17

Hi, I have old project compiled with Hiware. This old project is maked with editor Softec. I want translate my source in Visual Develop of ST.

Problem! My funcs RAMPA use *int in this mode:

void Rampa (volatile unsigned int *PWM, unsigned int val, unsigned char flag, unsigned char anta)

{

static unsigned int TempPWM;

TempPWM = *PWM;

.....

In old project this function is compiled fine and the code ASM is:

TempPWM = *PWM;

LD X,_Rampap3

LD A,(1,X) <--look this

LD X,[_Rampap3] <--and this

LD TempPWM:1,A

LD TempPWM,X

In new project, with Visual Develop, with same option for compiler ( FLAGS = -Ms -Cc -Cq -Lasm=%n.lst )

the function is compiled in this mode:

TempPWM = *PWM;

LD X,#1

CALL Rampa:265

LD A,([_LEX.w],X) <-- ???

LD Y,A

CALL Rampa:265

LD X,[_LEX.w]

LD A,Y

LD TempPWM:1,A

LD TempPWM,X

and not compile! I have this error:

ERROR L2410: Unresolved external __LEX (imported from funcs.o)

Why the compiler use LEX indirect access? Why the compiler change if I have used same options?

Advice? :o :) Thanks you!

[wolfgang2399]

Posted on July 30, 2007 at 08:07

Hi Marco,

with my MetroWerks compiler (Version 1.1) I'll get exactly the same assembler code as in your first example.

In your second example, PWM seems to be a pointer that points to a NEAR variable (16-bits addressing).

With a subroutine call this behaviour only might appear when using extended large memory model (flag = -Mx) but not when using small memory model(flag = -Ms).

So please check your memory model - or do you use the code outside a subroutine????

Regards,

WoRo

[marcosarti29]

Posted on July 31, 2007 at 19:41

Thanks for your help!

I have try to change memory model but I have the same error!

I must change my funcs...I cannot use pointer in my funcs very good for change all PWM register:

Rampa(&DCR0,... --> void Rampa (volatile unsigned int *PWM,...

Rampa(&DCR1,...

Rampa(&DCR2,...

Rampa(&DCR3,... :-[

Thanks again! bye