Matrix Display

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RPI Hardware Setup HDK

  • Please notice RTC and battery you don't need at beginning
  • Switch can turn to P3 chain side
  • The rest main not used at the beginning.
  • Connect P1 Port to your panel HUB "IN"
  • Connect lab power at least 3-5A 5V to LED panel.
  • Double check your panel specifications, we only support for our type panels. Different panel specification may need revise the code.

Board schematic, Functions

  • To use RTC DS1307, please don't forget to turn on IIC interface in "raspi-config", and switch turn to up.
  • IIC interface can leave on if not used P3, when you only use P2 and P3

  • Board schematic

Customized Version For Special Need

  • Please add order note "customized with angle pin header (not solder)"

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

Prerequisite Checklist

  • double check turn off SPI IIC, 1-wire, serial, etc in raspi-config
  • turn off sound in /boot/config.txt -> add line dtparam=audio=off
  • optionally install following modules: sudo apt-get remove bluez bluez-firmware pi-bluetooth triggerhappy pigpio
  • optionall added following to 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

32x16

  • Run example for our selling 32x16 panel:
./examples-api-use/demo -D 0 --led-cols=32 --led-rows=16 --led-multiplexing=8
./examples-api-use/runtext16.ppm -D 0 --led-cols=32 --led-rows=16 --led-multiplexing=8
  • To chain other panel:
 --led-chain=2 to --led-chain=4
  • Other example will have the same configuration
--led-rows=8 --led-chain=2

Other Panels

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

Quick Start Guide - Python Bindings

Advanced - Modify Code and Issues

Modify Transformer demo code

  • The code main differences are the transformer.cc transformer.h
  • notice to apply new transformer in your code, for example the demo code, ADD new line at 1163
matrix->ApplyStaticTransformer(rgb_matrix::EDTransformer()) ;
  • compile again -> cd into folder and compile it: make -C example*
  • now can start to run following demo

Apply new transformer

2018-07-16 183343.png
  • Please refer to above 32*16 zip file code, you can search and file EDTransformer() in 3 files
  • add as demo code to -> transformer.cc, before }; name_space rgb_matrix at the end
  • add as demo code to -> transformer.h, before }; name_space rgb_matrix at the end
  • add as demo code to -> led-matrix.cc, there are two lines
  • apply transformer into demo in line 1162~1163 -> matrix->ApplyStaticTransformer(rgb_matrix::P10outdoorTransformer());

2018-07-16 184504.png

Documents

Transormer for 16x32x1/4


int new_x = 0;
int new_y = 0;
if (y < 4 || (y > 7 && y < 12)) {
new_x = (x * -1) + (24 * ((x / 8) + 1)) - 17;
new_y = y;
} else {
new_x = x + (8 * ((x / 8) + 1));
new_y = y - 4;
}
delegatee_->SetPixel(new_x, new_y, red, green, blue);


Transformer canvas part for 32x32x1/8

new_x = ((x / 16) * 32) + (x % 16);
if ((y & 8) == 0) {
new_x += 16;
}
new_y = ((y / 16) * 16) + (y % 8);
  • Also in your transform class have:
int myTransformer::TransformCanvas::width() const {
return delegatee_->width() / 2; }
int myTransformer::TransformCanvas::height() const {
return delegatee_->height() ; }
  • Change the define in framebuffer.cc to SUB_PANELS_ 4 and remake the librgbmatrix library.
  • Try row = 32 and chains = double the number of panels in a chain.

Apply transformer

  • in demo-main.cc on line 1163 after the check for rotation:
matrix->ApplyStaticTransformer(rgb_matrix::Mikro2347Transformer());
sudo ./demo -D 0 --led-no-hardware-pulse --led-rows=16 --led-chain=2

Constant Matrix Drive


Referential Usage Documentation

LED - 5. Raspberry Pi 4 + DietPi Buster + Electrodragon HAT


"RGB Panels, from 192x80, to 384x192, to 384x256 and maybe not much beyond"



Showroom Project

Arduino

ESP8266


PxMatrix Setup

Please double check all the following options

  • #define matrix_width 32
  • #define matrix_height 16


  • display.begin(4); // 1/4, 1/8, 1/16 and 1/32 row scan. where n={4,8,16,32}


  • display.setScanPattern(ZAGGIZ); // Define your scan pattern here
Our panel matrix_width matrix_height Scan Pattern
32x16 32 16 4 ZAGGIZ
64x64 64 64 32 default LINE

Other resources

Library

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