hardware

https://www.electrodragon.com/product/rgb-matrix-panel-drive-board-raspberry-pi/

  • legacy wiki page - https://w.electrodragon.com/w/RPI_RMP_Guide

  • Pin Definitions, Product Series please refer to page - RMP-driver-dat

Board Map

Output Control Chains

  • TOP - P0
  • Middle - P1
  • Bottom - P3

JP3 Power Supply Pins

  • 3.3V
  • GND
  • 5V

Switch SW1

  • Left to I2C RTC
  • right to use on board P3 chain output

GND - RX

  • ROW_E to GND
  • or RX debug output

JP1 / JP2 / JP3

  • ROW_E buffer select to
    • pin 4
    • or pin 8
    • or gnd

Board Functions

software

  • code: https://github.com/hzeller/rpi-rgb-led-matrix
  • board: https://github.com/hzeller/rpi-rgb-led-matrix/tree/master/adapter

C execute file

clone project, build the binary executable file, and use following commands

make -C examples-api-use

commandline test

The panels of the same size could have different drive (scan) methods, it depends on the panel's driver chip. please try different led-multiplexing, from 0~17

--led-multiplexing=0

demo video

  • lately test 1 - https://www.youtube.com/watch?v=KG2e6GpXDIY&ab_channel=Electrodragon
  • early test 1 - https://www.youtube.com/watch?v=wN-cqQ_2kNs&ab_channel=Electrodragon
  • early test 2 - https://www.youtube.com/watch?v=LgrxaVafo5o&ab_channel=Electrodragon

telegram CH

  • https://t.me/electrodragon3/216
  • https://t.me/electrodragon3/217

common FAQ

common errors

chip check

  • probably NOT supported Panels: ICN2153 ICN2053 chips

  • Check the chip type (FM6126A)

more FAQs

  • Using all 3 chains with rPi 4, is there any GPIO free to use?
    No any free pins left except SC / SD pins

  • What are SC and SD pin holes? GPIO0 = SDA0, GPIO7 = SCL0

  • What are RX pin hole? GPIO15, ROW_E pin, can be set to ground

checklist

Prerequisite Checklist, double check for GPIOs

turn off => SPI IIC, 1-wire, serial, etc in raspi-config

turn off => sound in /boot/config.txt -> add line dtparam=audio=off

optionally remove following modules: sudo apt-get remove bluez bluez-firmware pi-bluetooth triggerhappy pigpio

optionally disable: audio in kernel

cat <<EOF | sudo tee /etc/modprobe.d/blacklist-rgb-matrix.conf
blacklist snd_bcm2835
EOF

sudo update-initramfs -u

by following up setup, the GPIO output should be all good

ref

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