[SOLVED] Reading input pins of ATMEGA16

[MonsterSocket]

Ok, so hello everyone

I seem to have a problem with this project of mine.

Simple description

I'm using reed switches tied to ground, and to PORTD of my ATMEGA16

The magnet triggers more then one reed at time.

I need to be able to single out a reed switch as the greatest switch compared to other switches, and i can't seem to be able to do 2 things properly

I can't get the input of just one pin, otherwise this would be easy, let's start here, but a logic low means on, and I'v set PORTD = 0xFF; so pull ups are on.

How do i read and store an individual input pin and compare it to the other inputs ?

sample code :

if (PIND == (0b11111110 & 0xFF))


input = 5;



if (PIND == (0b11111101 & 0xFF))

input = 20;


If either pin is switched on, they do work, but when both are on my LEDS dont work...
DDRD = 0x00;
PORTD = 0xFF;

Whats a good way to store each pin and then compare which one is greater and my input var to the correct one?

 

[milan.rajik]

Please post your circuit. You can use Proteus to draw the circuit.

 

[MonsterSocket]

Ok will post it soon

- - - Updated - - -



Heres a basic circuit layout, Reed switches for inputs, LEDS for output

I have it where if one switch is connected i get the proper output, but if one or more switches are tied to it, nothing

- - - Updated - - -

If figured the code out its all done heres a snippet

if (~(PIND) & 0b00000001)
input=14;

if (~(PIND) & 0b00000010)
input=15;


And thats all folks

 

[MonsterSocket]

And it works on top down programming structure so it automatically determines highest value switch that is set