Re: [Amforth-devel] Butterfly problems

[Kalus M. <mic...@on...>]

Hi MIke.

Am 16.03.2010 um 16:31 schrieb Mike Beach:


> .. I'll have a look at your posts, and take the LCD and ADC as a bit
> of a challenge. For this project though, I'm expecting to use a  
> separate 20x4 LCD, and
> external ADCs via a cable.

May be you want to take a look at lcd.frt and lcd.asm. That worked  
fine in earlier versions of amforth and did well in amforth-3.9  
recently. You may chose to include lcd.asm while assembling, or use  
lcd.frt later to download forth code to a running amforth system on  
the butterfly.

I created this while using the polling i/o method for the USART, so  
the anforth system tolerated the redirection of the EMIT vector (see:  
source code lines 89,90) to send strings to the LCD:
: <lcd>   ( -- )   lcdcr    ['] lcdemit is emit ;
: </lcd>  ( -- )   tob wlcd ['] tx0     is emit  ;

But using the (default) interupt driven i/o method for EMIT, amforth  
will crash as son as you try to execute <lcd>. So you can not use  
ldc. or lcd" from the shelf if you use the interupt i/o. May be you  
find a way to work around this and improve the code to fit both ways  
to handle the terminal i/o.

Michael