AVR-Chat

Hi all,

 

I have a small board from another project that only has PA0 to PA5 of an
ATMega324P brought out and I need to do the following:

 

1 pulse input (PA0/INT0)

2 ADC input (PA1 and PA2)

1 digital output (PA3)

I2C bus (PA4 and PA5)

 

Is it possible to use the ADC on PortA on only 2 channels, ie mixed digital
and analog like this?

 

I have tried but the 2 ADC channels (1 and 2) are always returning a 1023
bit reading. 

 

I have disabled the digital on those 2 channels.

 

 

Is this at all possible or am I going to have to build a small external ADC
board to do this over I2C?

 

 

Dave.

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Very funny Scotty, now beam down my clothes.

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