AVR-Chat

Sorry forgot to include compiler WIN AVR avr-gcc (GCC) 3.4.1
Thanks you hit the nail on the head. 

Changed it to 
if (PIND & (1<<PIND4)) 

and it is working.


-----Original Message-----
From: Larry Barello [mailto:yahoo@barello.net] 
Sent: Monday, January 17, 2005 11:16 PM
To: AVR-Chat@yahoogroups.com
Subject: RE: [AVR-Chat] Testing a switch on ATMega128



What is "PIND4"?  You wouldn't happen to mean PIND.4 or (PIND &
(1<<PIND4)) or PIND.PD4 or some variation like that?  Which compiler?


-----Original Message-----
From: wbounce

I have the following

5v ------ switch ------10K resistor --- ground
                   |
                   |-- 330 resistor -- PORTD4


This is supposed to be a switch with a pull down resistor.

By default the pull up resistors should be on for a Atmega128 so I did
the following

DDRD &=  0xEF; // turn pin4 to input
PORTD &=  0xEF;  // write 0 to pin4 to disable pullup


	printf("pinb %i ",PIND4);
	if (PIND4)
	{
	PORTB ^= 0x01;    // off LED



 
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