AVR-Chat

On 8/6/2010 3:16 AM, Jeff Blaine wrote:
> I have an encoder service function that reads a couple of bits from an AVR and increments a counter if a turn was decoded.
>
> To make the function generic, I would like to pass the port bits as arguments to the function.
>
> Unfortunately, I cannot quite figure out how to pass the port bits to the function.  Appreciate advice as to what I'm overlooking...
>
> function prototype looks like this:
>
> char encoder_service(char *avr_port_bit_A, char *avr_port_bit_B) {
>
> }
>
> In the main program, I would have something like this to call the function
>
> x = char pointer to PORTA0
> y = char pointer to PORTA1
>
> encoder_service(   x   ,   y   );
>
> Using standard C.

Why not just pass the state of the pins?

Robert

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