Key Bounce

Discussion around the Swiss Micros DM42 calculator.
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kevinvinv
Posts: 8
Joined: Wed Jul 11, 2018 10:40 pm

Key Bounce

Post by kevinvinv » Wed Aug 15, 2018 9:30 pm

Hello, I occasionally get a key bounce on the DM42. Does anyone know if the debounce timer settings can be adjusted somehow? I suspect not but wanted to ask :) I love my DM42

Dave Britten
Posts: 36
Joined: Wed Jun 14, 2017 7:27 pm

Re: Key Bounce

Post by Dave Britten » Mon Aug 20, 2018 12:41 pm

There's nothing currently, but I agree that it's needed. And it should be a per-key delay so as not to affect quick inputs of multiple keys in sequence. i.e. have an in-memory array with one element for every physical key, and record the CPU tick count of the last press, then ignore repeat presses of that key until sufficient ticks have passed. The bounce problem is minor enough that I'm pretty sure that would solve it entirely.

kevinvinv
Posts: 8
Joined: Wed Jul 11, 2018 10:40 pm

Re: Key Bounce

Post by kevinvinv » Wed Sep 05, 2018 12:42 pm

HI Dave, really this key bounce thing is my only issue with this amazing calculator. I keep getting bit by it.

Do you have any idea if this is high on any developers list?

Dave Britten
Posts: 36
Joined: Wed Jun 14, 2017 7:27 pm

Re: Key Bounce

Post by Dave Britten » Wed Sep 05, 2018 5:48 pm

I wish I knew! It's somewhat better after softening up my keyboard, but it definitely still happens.

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