Add TouchIn "pull_dir" option, touchio works for RP2350 #10223
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Following up on #9541, I decided to look into getting
touchioworking for RP2350 without causing too much API change.Here's a first attempt. It adds a new boolean
pull_dirparameter totouchio.TouchIn. Defaulting topull_dir=False,TouchInacts as before. Ifpull_dir=Trueand an external 1M pull-up is wired,TouchInwill now also work on RP2350.I believe this is similar to what DanH was imagining, but much simpler. (It felt odd to me to reuse
digitalio.DigitalInOut.Pullthat has a strong association with built-in pull resistors)Tested on RP2350 and RP2040.