AVR-Chat

Do you mean don't put a current limiting resistor between the switch and
PORTD4?


-----Original Message-----
From: Paul Maddox [mailto:P.Maddox@signal.qinetiq.com] 
Sent: Tuesday, January 18, 2005 3:59 AM
To: AVR-Chat@yahoogroups.com
Subject: Re: [AVR-Chat] Testing a switch on ATMega128




> I have the following
> 
> 5v ------ switch ------10K resistor --- ground
>                    |
>                    |-- 330 resistor -- PORTD4
> 

huh?
Try this ;-

5v ------ switch --+---10K resistor --- ground
                             |
                             |--- PORTD4
 
This assumes the switch is the 'normally open' type.

> printf("pinb %i ",PIND4);
> if (PIND4)

Assuming we're talking CodeVision AVR ;-
> printf("pinb %i ",PIND.4);
> if (PIND.4)

Paul


 
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