[AVR] fasmg assembles with error(s)

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tomi

Joined: 08 Nov 2017
Posts: 3

tomi 08 Nov 2017, 15:15

I tried to assemble a lil project that correctly assembles with avrasm2.exe but fasmg throws error(s). Is there a better add-on for fasmg available?

08 Nov 2017, 15:15

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20445
Location: In your JS exploiting you and your system

revolution 08 Nov 2017, 16:00

Can you show the source code, or the line(s) that give(s) an error?

08 Nov 2017, 16:00

tomi

Joined: 08 Nov 2017
Posts: 3

tomi 08 Nov 2017, 16:41

This is the output:

Quote:

flat assembler version g.hykpg
sensor.asm [35]:
.include 'sensor.inc'
Processed: .include 'sensor.inc'
Error: illegal instruction.

Original line is: .include "sensor.inc"

08 Nov 2017, 16:41

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20445
Location: In your JS exploiting you and your system

revolution 08 Nov 2017, 16:53

".include" is not fasm syntax. fasm uses "include" without the dot (.) character. fasmg follows this convention also. You can change the source code and remove the leading dot.

Note that all assemblers are different. In general you usually can't assemble unchanged source code from one assembler on another assembler, unless you take specific steps to support it and the assemblers are very similar.

08 Nov 2017, 16:53

tomi

Joined: 08 Nov 2017
Posts: 3

tomi 08 Nov 2017, 17:02

Thanks for explanation. I'll see if I can make fasmg to accept .include as well, because changing my sources is not an option, I code in asm almost every day and there is tons of code there.

08 Nov 2017, 17:02

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8358
Location: Kraków, Poland

Tomasz Grysztar 08 Nov 2017, 20:26

At the end of AVR.INC that comes as an example with fasmg you may find a macro that already adds support for some directives starting with dot:

Code:

macro ? line&
        match =BREAK?, line
                _BREAK
        else match .=ORG? addr, line
                if ~ DSEG?
                        org (addr) shl 1
                else
                        org addr
                end if
        else match .=EQU? name == value, line
                name? = value
        else match .=DSEG?, line
                if ~ DSEG?
                        virtual at DSEG?.$
                        DSEG? = 1
                end if
        else match .=CSEG?, line
                if DSEG?
                        DSEG?.$ = $
                        end virtual
                        DSEG? = 0
                end if
        else
                line
        end match
end macro

You could add support for ".include" by adding another clause like:

Code:

        else match .=INCLUDE? file, line
                include file

But still, the AVR example included in fasmg package is only a very simple one and it does not attempt to fully emulate syntax of any other AVR assembler. Someone probably could make a better set of macros for this purpose, but I don't know if anyone tried.

08 Nov 2017, 20:26

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