Hello! I’ve dug through the code of the SmartMatrix library quite a bit, and I haven’t found any mention of where to connect the pins labeled ‘A’, ‘B’, and ‘C’ on my 16x32 matrix. My board has a socket that looks like this:
And I’ve connected it to my Teensy 4.1 via a logic level shifter, however as it stands, regardless of which model I choose, I can only get it to light up rows 1 and 9, (or 1 and 9 separately, I think it uses alt addressing?)
I’m wondering if the reason for this is because I haven’t figured out where to connect the A, B, and C pins - could that be the issue? Is this type of matrix supported by the library? Thanks in advance!
Yes, you do need to connect them.With the Teensy 4.x, you need more than a level shifter to drive the address lines. Take a look at the schematic for the SmartLED Shield for Teensy 4 to see the circuit needed (in particular the 74x374 chip):
I just wanted to say thanks again, I was able to easily get it working by using an ESP32 instead, no logic level shifters needed either. I appreciate the huge amount of time you’ve put into this library and the documentation for it!
