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[SOLVED] How to use two encorders with PIC 18F2550

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wolf12

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Hello, I need to use two rotary encorders(better if three encorders are possible) and use interrupts to sense X,Y,Z position. How to do this with only 1 intterupt pin availble in PIC 18F2550?
Thanks
 

Four of the PORTB pins (RB7:RB4) have an interrupt on change feature.
Int0, Int1, Int2 on pins RB0, RB1, RB2.

Thats 7 external interrupts
 
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rotary-encoder.jpg

rotary-encoder-circuit.jpg
 

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If you want to use interrupts, you need to change the design layout.
Or you will have to poll the encoder inputs.
 
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