Good afternoon,
As the title suggests, I could use some help on how to best map out a microcontroller on a remote controller (handwand to a chair).
Reason is I would like to eventually reprogram it to do different things, but that's for later. I currently don't know where to being exactly with how to map out which Switches (there are 9 push button switches) along with LEDs to each. These are what I need to figure out so I can reprogram the micro to control a function based on which switches are pressed.
My issue is, taking a multimeter, I cannot trace any direct path to the micro. Everything is either behind a diode or resistor, making continuity checks difficult. I've located the "ground" side of each, and verified them to ground. They are all tied together. The other side goes to a diode, then disappears somewhere behind the circuit board on the other side, or potentially just a spot I haven't be able to find direct path continuity to yet.
Is there a better method or way to do this? I was thinking they might be charliplexed, and if so, how would I go about mapping/drawing out where everything goes with no schematic, and no idea what pins do what on the current micro. Any help or tips, good resources for this specific type of problem would be greatly appreciated, thanks!
As the title suggests, I could use some help on how to best map out a microcontroller on a remote controller (handwand to a chair).
Reason is I would like to eventually reprogram it to do different things, but that's for later. I currently don't know where to being exactly with how to map out which Switches (there are 9 push button switches) along with LEDs to each. These are what I need to figure out so I can reprogram the micro to control a function based on which switches are pressed.
My issue is, taking a multimeter, I cannot trace any direct path to the micro. Everything is either behind a diode or resistor, making continuity checks difficult. I've located the "ground" side of each, and verified them to ground. They are all tied together. The other side goes to a diode, then disappears somewhere behind the circuit board on the other side, or potentially just a spot I haven't be able to find direct path continuity to yet.
Is there a better method or way to do this? I was thinking they might be charliplexed, and if so, how would I go about mapping/drawing out where everything goes with no schematic, and no idea what pins do what on the current micro. Any help or tips, good resources for this specific type of problem would be greatly appreciated, thanks!