Re: [Amforth] TWI - 7segment display Gravitech.us

[Jan K. <kro...@ho...>]

Dear Erich, I have done what you wrote, seems to work.But when I look to te code of twi.frt I see some strange thing, or missing sommething. When I look into the code never is sending the address in twi.start \ send start condition
: twi.start ( -- )
    [ 1 7 lshift
      1 5 lshift or 
      1 2 lshift or ] literal
    TWCR c!
    twi.wait
; Where should I put the address? Thanks for any help.Cheers, Jan
 > Date: Fri, 1 Jun 2012 21:36:24 +0200
> From: ew....@na...
> To: amf...@li...
> Subject: Re: [Amforth] TWI - 7segment display Gravitech.us
> 
> Hi Jan,
> 
> 
> On 06/01/2012 08:58 PM, Jan Kromhout wrote:
> > It is not working.
> 
> Where exactly is "it"?
> 
> Can you talk to the twi device? Did you try twi.scan? It should 
> report every device on the twi bus.
> 
> Did you enable the twi subsystem?
> 
> \ enable twi
> \ TWBR = $03, TWPS[10] = $03  ==> 28 kHz (f_cpu: 11059200)
> : +twi ( -- )
>      $00 TWCR c!
>      $03 TWBR c!
>      $03 TWSR c!
> ;
> This code snippet works on atmega32. Check the datasheet whether 
> it is the same for your controller.
> 
> > It seems to hang. Can continue with a hard reset!
> 
> 
> Cheers,
> Erich
> 
> 
> 
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