8-bit MicrocontrollersのトピックRe: Relocatable Assembly Problem

Relocatable Assembly Problem

mylim — Sun, 23 Nov 2008 14:19:26 GMT

Hi, I'm trying to set a self defined flag in my extended file but I can't read/write the status of the flag in my main.asm file.
My flag is define in the relocatable file .asm & export it in .inc file.
I include the .inc file in my main.asm.
I've attached the 3 files for your reference.
I use DS 1 byte for TPM1SR & TMRF as constant EQU $00.
I tried BSET TMRF,TPM1SR in S08_TPM1_tmr.asm
then I did a BRSET condition in MAIN_.asm I could get the condition set in S08_TPM1_tmr.asm.

Please advise. Thanks.

Regards,
MY

Message Edited by mingyee on 2008-11-23 02:20 PM

Re: Relocatable Assembly Problem

Ake — Mon, 24 Nov 2008 18:21:39 GMT

Hi,

You have in your code the variable

TPMSR ds 1

this name is used by the procedure MCUinit() that you are calling.

So change the name to

TPMSRA ds 1

and at the following

chkled      brset TRMF1,TPMSRA,chkled1
            bra    chkledz
chkled1      bclr   TRMF1,TPMSRA

and the code assembles correctly.

Regards,

Ake

Re: Relocatable Assembly Problem

mylim — Mon, 24 Nov 2008 19:41:50 GMT

Hi Ake,
Thanks for your response.
Actually, I'm intending to use the TPM1SR globally, shared among the MAIN_.asm & S08_TPM1_tmr.asm.
Please advise.

Regards,
MY

Re: Relocatable Assembly Problem

bigmac — Mon, 24 Nov 2008 23:15:20 GMT

Hello MY,

You do not say which MCU type you are using, but is is possible that the register TPM1SR may already be defined by the file derivative.inc (or the .inc file that it includes). If you need a RAM register to handle flags of your own creation, it will require to have a different name, as suggested by Ake.

Regards,
Mac

Message Edited by bigmac on 2008-11-25 02:20 AM

Re: Relocatable Assembly Problem

mylim — Tue, 25 Nov 2008 00:39:06 GMT

Hi guys, i guess i posted the wrong MAIN_.asm file as i was trying to declare
TMRF equ 1
TPM1SC ds 1
in MAIN_.asm after failing to write into TPM1SC which i declared in S08_TPM1_tmr.asm
& I've checked thru TMP1SC has not been used in any other files.
Please find the project files as attached.
I'm using AW60 MCU.
Thanks.

REgards,
MY

AW60_RP4880v3_0.zip

Message Edited by t.dowe on 2009-10-27 12:00 PM

Re: Relocatable Assembly Problem

bigmac — Tue, 25 Nov 2008 08:06:12 GMT

Hello MY,

You will see that the derivative.inc file includes the CW file MC9S08AW60.inc. This latter file already defines the symbol TPM1SC as a hardware register, the status and control register for TPM1. You cannot use the same name for a RAM register, where both definitions are visible to a particular file.

It is best to keep well clear of the standard register names for the MCU to avoid such conflicts.

Regards,
Mac

Re: Relocatable Assembly Problem

mylim — Tue, 25 Nov 2008 08:47:41 GMT

Hi Bigmac,
My mistake, actually i'm declaring it as TPM1SR instead of TPM1SC.
**bleep**.. I must be so blur that I'm almost blind.
Sorry for the confusion.
Thanks.

Regards,
MY

Re: Relocatable Assembly Problem

bigmac — Thu, 27 Nov 2008 11:44:10 GMT

Hello MY,

The following seems to explain the reason for your previous problem -

Near the top of the MAIN_.asm file you have included the file S08_TPM1_tmr.inc. This latter file provides a conditional XREF to the label TPM1SR, to indicated that the definition for the label will be found elswhere (not within the current MAIN_.asm file). If you then define the label as a zero page variable, this represents the conflict that you have observed.

If you wish to define the variable within MAIN_.asm,. but still provide the conditional XREF within S08_TPM1_tmr.inc (for use by other files), perhaps XDEF the label prior to the INCLUDE directive.

File: MAIN_.asm:

XDEF TPM1SR
INCLUDE "S08_TPM1_tmr.inc"
...

MY_ZEROPAGE: SECTION SHORT
TPM1SR ds 1
...

File: S08_TPM1_tmr.inc:

IFNDEF TPM1SR
XREF TPM1SR
ENDIF
...

Regards,
Mac