RGBMatrix support for 64x64 panels on Feather M4?
Re: RGBMatrix support for 64x64 panels on Feather M4?
Re: RGBMatrix support for 64x64 panels on Feather M4?
Re: RGBMatrix support for 64x64 panels on Feather M4?
jepler wrote:I haven't tried it personally (I only have a 16x32 and a 32x64 board), but the code is intended to support it. You're right that you'll have to make modifications to the featherwing, cutting a GND trace and hooking it to the Feather pin you designated as ADDR_E using the provided through-holes as a mini-protoboard area. Then, in the source code, you'd add that pin at the end of the addr_list. Of course, it will take more memory and processing time away from your CircuitPython program
Give it a try, and let us know the result!
Re: RGBMatrix support for 64x64 panels on Feather M4?
Re: RGBMatrix support for 64x64 panels on Feather M4?
tslagle wrote:Pin 8 that is used for ADDR_E on the 64x64 panels is designated as GND on smaller LED arrays. I can't see where pin 8 is grounded on the feather wing PCB but if it is, that connection would need to be cut so that another pin on the feather could drive it without being shorted to GND. I haven't received my 64x64 matrix yet, so this is just based on looking at the pictures of the boards.
Re: RGBMatrix support for 64x64 panels on Feather M4?
Re: RGBMatrix support for 64x64 panels on Feather M4?
jepler wrote:OK, yes, according to the schematic from our learn system, the pins 8 and 16 that are sometimes used as additional "address" pins are unconnected on the RGB Matrix Featherwing, so you can simply solder a jumper wire from the pin you want to use to to the spot next to the address pin. I think the Adafruit displays are "pin 8" but I did not verify that.
Re: RGBMatrix support for 64x64 panels on Feather M4?
jepler wrote:OK, yes, according to the schematic from our learn system, the pins 8 and 16 that are sometimes used as additional "address" pins are unconnected on the RGB Matrix Featherwing, so you can simply solder a jumper wire from the pin you want to use to to the spot next to the address pin. I think the Adafruit displays are "pin 8" but I did not verify that.
Re: RGBMatrix support for 64x64 panels on Feather M4?
memcbride wrote:jepler wrote:OK, yes, according to the schematic from our learn system, the pins 8 and 16 that are sometimes used as additional "address" pins are unconnected on the RGB Matrix Featherwing, so you can simply solder a jumper wire from the pin you want to use to to the spot next to the address pin. I think the Adafruit displays are "pin 8" but I did not verify that.
From the learning guide for the Raspberry Pi RGB Hat on how to set the E addr jumper on the hat for a 64x64 panel:
"Melt a blob of solder between the center “E” pad the “8” pad just above it (for 64x64 matrices in the Adafruit shop)…or the “16” pad below (rare, for some third-party 64x64 matrices…check datasheet)."
Re: RGBMatrix support for 64x64 panels on Feather M4?
Re: RGBMatrix support for 64x64 panels on Feather M4?
jepler wrote:This lib for Arduino should be capable of 64x64: https://learn.adafruit.com/adafruit-pro ... ix-library