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geekhack Projects => Making Stuff Together! => Topic started by: xmagusx on Sun, 10 April 2016, 15:44:27

Title: Hall Effect switches and TMK firmware
Post by: xmagusx on Sun, 10 April 2016, 15:44:27

Hey all, I've been starting to tinker with some of my HE switches again, and was wondering if anyone had ever tried to use them with the TMK firmware before. The main difference that I can tell is that the input reading for a cherry switch is either 0v or 5v, whereas the HE switches output either 0v or .2v. I think the main modification I would need to make to the firmware would just be to set the pullup resistors on the inputs, but I'm not sure how to go about doing that. I've been reading the source, but figured I'd ask here in case someone else has already solved this particular problem.

Thanks!

Title: Re: Hall Effect switches and TMK firmware
Post by: AKmalamute on Sun, 10 April 2016, 20:54:13

The Xwhatsit software uses a variant of TMK, doesn't it...? Capacitively sensed buckling spring switches have to go through an odd (by MX standards) series of questions to determine "on" or "off" states.

You might go looking for the software for those controllers -- sorry, don't have the link handy -- to see if it addresses the kinds of questions you're after.

Title: Re: Hall Effect switches and TMK firmware
Post by: xmagusx on Sun, 10 April 2016, 21:28:07

Will definitely look into it, thanks for the heads up!