AVR-Chat

Yes. 

 

All setup and code to read the ADC should work.

 

If this fails I may switch to using an Arduino with the Mega328 as I can debug this via the debug wire interface.

 

That way I don't have any issues with ADC and digital on the same port.

 

 

Dave…

 

From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Cat C
Sent: 14 May 2013 14:57
To: AVR-Chat@yahoogroups.com
Subject: RE: [AVR-Chat] Can you have split ADC usage

 

  

Did you set up the MUX?
Cat

-----Original Message-----

From: Dave McLaughlin
Sent: 14 May 2013 02:23:42 GMT
To: AVR-Chat@yahoogroups.com <mailto:AVR-Chat%40yahoogroups.com> 
Subject: [AVR-Chat] Can you have split ADC usage

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.

---

Very funny Scotty, now beam down my clothes.

---

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