T4.0 Re-assigning pins to get more analogue inputs

[houtson]

Don't know if this is easy, hard or impossible....

Audio Project using T4.0 and Audioboard Rev D.

Rev D knocks out a number of analogue inputs and I've got 6 pots that I want to read - not enough usable topside analogue pins and trying to avoid bottom pins.

Is there anyway to re-assign a couple of digital pins to analogue (e.g. pins 2&3 to A10&A12)?

Any ideas appreciated, cheers, Paul

[defragster]

If not using SPI for RAM/DISPLAY/SD then pin #13 is free, And #15 is only used when Audio pot board is in use.

With those two and #'s : 14, 16, 17, 22 that is 6 analog pins?

Other than using those pins - it doesn't seem as though analog could map from digital pins or it would be noted.

IIRC the i2c pins to Audio #'s: 18/19 , Are only used at startup to prep the Audio chip, and not required after that? Though having pots connected during that would likely be a stopper unless they were switched out - and then i2c pullups would affect the analog pots.

[houtson]

Thanks for looking at this...

I'm using 14,15,16 &17 at present - so got 4 good.

Trying to use 22(A8) but lots of noise no matter what I do (closeness to MCLK?) - may be able to do more shielding / filtering but it's jumping all over the place and still short of 1 .

Using I2C (18 &19) for a NeoTrellis button pad as well as the AudioBoard so 18/19 are out

Not using SPI but didn't think 13 was analog?

[MichaelMeissner]

Not using SPI but didn't think 13 was analog?

Yes, pin 13 is not an analog pin.

[defragster]

Yes, pin 13 is not an analog pin.

opps - quite right ...