Re: [Amforth-devel] Image Debug

[Matthias T. <mt...@we...>]

Andy,

> Compilation is fine except for a single warning:-
>
> C:\Documents and 
> settings\andy\Desktop\forthduino_3.8\core\devices/atmega1280.asm(192): 
> warning: .cseg .db misalignment - padding zero byte
>   

Just add a space to your mcuname string. It's not crtical however.

> At the moment I am considering the list below.
>
> 1. I missed tweaking something in the code as it comes, Mathias 
> suggested  using polled serial comms instead of ISR's. Do I need to 
> tweak something to make this so, or does it do it already? There may be 
> no response from the serial link but the board may actually be running.
>   

I just reviewed the template application files. They use the
poll based words now. Maybe the commit diffs that can
be viewed at

http://amforth.svn.sourceforge.net/viewvc/amforth?view=rev&revision=860

are helpful as well.

> 2. I have got something wrong with the fuses and addresses etc and the 
> board just is'nt running. Programing all verifies etc and is done from 
> AVR Studio, 4.18 with an AVR ISP Mk2.
>
> BOD, Disabled
> SPI, Enabled
> Boot Flash 4k, start $F000 (to match .equ max_dict_addr = $F000)
> Full swing osc , slow rise time with max delays
>   

That is probably wrong. Just set the fuses to the factory defaults _and_
change the osc settings _only_ . The boot fuses are not relevant here.

>
> 3. I have got something wrong with the hardware defs or the tweaks to 
> the app asm file and the code just is'nt running, crashed.
>   

You defined the usart3 as your terminal IO port. Is that really really ok?
I had that kind of error more than often, stupid thing that.

>
> To help with the debugging, I need to turn on the debugging LED that is 
> connected to port B7.
>
> Where and how is best to place the code?
>   

An LED is not that useful. Place a piezo there instead. Than you
can hear the controller working. The LED may only dim.

I usually use the pause word to toggle the IO port, than I can hear
that the controller does nothing but waiting for a keystroke. Another
place would be the DO_NEXT label, but here you may need to
put an count down as well since the inner interpreter is called
very often (ultra sonic frequencies usually).


> Whilst ultimately blinking would be nice for now I am happy with turn 
> the LED on.
>
> I am not really looking for someone to do this for me here, just point 
> me in the right Amforth compatible direction.
>   

There is no such "amforth compatible direction" thing at all.

Good luck
Matthias