I looked through the topics, and didn’t see anything like this, but I’m somewhat new to this, and may not know exactly how to ask this question.
Basically I’m trying to wire a switch matrix. I have a working solution, but it utilizes two diodes per switch, and I’d like to reduce that to one if it is possible.
For instance, I have two pins connected to the anode of two diodes. The cathodes connect to a switch which is then grounded. When I AND the isPinHigh output for those two pins I get the signal to send a specific key command to the receiver (a second Wixel). This is repeated for several pins, switches, and diodes.
The desired schematics I’ve looked at always seem to have a row and column of pins, but a single diode, and if I’m understanding correctly, the column pin is being routed to the row pin (or vice-versa) instead of to ground. Here’s one example I’ve been looking at: blog.komar.be/how-to-make-a-keyboard-the-matrix/
I’m not quite sure how to approach this, if it is possible, and if it can be done safely (without frying the Wixel), so I thought I’d ask here.
I’ve looked at the documentation, and was thinking the setDigitalInput/setDigitalOutput may be the right direction, but again, my concern is that I’ll send P0_0 to P1_2, and damage the Wixel internally.
If there are any example programs or general info that might help I’d greatly appreciate it. Sorry if this is an obvious or stupid question, it’s had me scratching my head for a while…