RPI RMP Guide

RPI Software Setup SDK

Main Github

Please ask for software support via github
clone project https://github.com/hzeller/rpi-rgb-led-matrix/tree/master/adapter
build the binary executable file, and use following commands

make -C examples-api-use

https://github.com/hzeller/rpi-rgb-led-matrix

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

Quick Start Guide

Drive Notice

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

P8 P10 Outdoor 32x16 (tested)

Run example for our selling 32x16 panel

P10 - 32x16

./examples-api-use/demo -D 0 --led-cols=32 --led-rows=16 --led-multiplexing=8

./examples-api-use/demo -D 0 --led-cols=32 --led-rows=16 --led-multiplexing=3
./examples-api-use/runtext16.ppm -D 0 --led-cols=32 --led-rows=16 --led-multiplexing=8
./examples-api-use/demo -D 0 --led-cols=32 --led-rows=32 --led-multiplexing=1

To chain other panel:

 --led-chain=2 to --led-chain=4

Other example will have the same configuration

--led-rows=8 --led-chain=2

32x32

multiplexing =1

./examples-api-use/demo -D 0 --led-cols=32 --led-rows=32 --led-multiplexing=1

P4 64x32 (tested)

multiplexing=0

./examples-api-use/demo -D 0 --led-cols=64 --led-rows=32 --led-multiplexing=0

Tested panel is 64x32 P4-256x128-2121-A1

P3/P4 64x64 (tested)

Extra Setup Needed

Setup P4 jumper to ground, P8 jumper to #E line

multiplexing usually 0 or 1, try further options only when you have special board

CMD for both P3/P4

./examples-api-use/demo -D 0 --led-cols=64 --led-rows=64 --led-multiplexing=1

128x128 / 256x128

Should be not supported

Panel Specifications

Working Panel	Demo code	Panel Specification	Command
32x16 P8 or P10	3216	1/4	./demo -D 0 --led-rows=8 --led-chain=2
32x32 P6	3232	1/8
64x32 P4	NA	1/16
64x64 P4	NA	1/32

Drive Demo

The following demos are tested at 13th April

32x16
32x16 panel specs
6432 test01
6432 test02
64x64 test
64x64 P3 specs
64x64 P4 specs

More Types of Demos

Runtext demo 01
Runtext demo 02

./demo -D 1 runtext.ppm --led-no-hardware-pulse --led-slowdown-gpio=4 --led-cols=64 --led-rows=32

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

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