Documentation

// MAX7219 4-in-1 Dot Matrix - Arduino Scrolling Text
// Library: MD_Parola + MD_MAX72XX (Library Manager)
// Wiring: DIN -> D11, CS -> D10, CLK -> D13

#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>

#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES   4     // number of 8x8 blocks in the chain
#define CS_PIN        10

MD_Parola display = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);

void setup() {
  display.begin();
  display.setIntensity(5);       // 0 (dim) - 15 (bright)
  display.displayClear();
  display.displayScroll("ShillehTek MAX7219", PA_LEFT, PA_SCROLL_LEFT, 80);
}

void loop() {
  if (display.displayAnimate()) {
    display.displayReset();
  }
}

#!/usr/bin/env python3
# MAX7219 4-in-1 Dot Matrix - Raspberry Pi Scrolling Text
# Install: pip install luma.led_matrix --break-system-packages

from luma.core.interface.serial import spi, noop
from luma.core.render import canvas
from luma.core.legacy import text, show_message
from luma.core.legacy.font import proportional, CP437_FONT
from luma.led_matrix.device import max7219
import time

serial = spi(port=0, device=0, gpio=noop())
device = max7219(serial, cascaded=4, block_orientation=-90, rotate=0)
device.contrast(0x30)   # 0x00 - 0xFF

show_message(device, "ShillehTek MAX7219",
             fill="white", font=proportional(CP437_FONT),
             scroll_delay=0.04)

# MAX7219 4-in-1 Dot Matrix - Pico MicroPython Scrolling Text
# Upload max7219.py to the Pico (micropython-max7219 driver)
# Wiring: DIN -> GP19, CS -> GP17, CLK -> GP18

from machine import Pin, SPI
import max7219
import time

spi = SPI(0, baudrate=10_000_000, polarity=0, phase=0,
          sck=Pin(18), mosi=Pin(19))
cs  = Pin(17, Pin.OUT)

display = max7219.Matrix8x8(spi, cs, 4)  # 4 blocks cascaded
display.brightness(5)                    # 0 - 15
display.fill(0)

message = " ShillehTek MAX7219 "
while True:
    for pos in range(len(message) * 8):
        display.fill(0)
        display.text(message, -pos, 0, 1)
        display.show()
        time.sleep(0.04)

# MAX7219 4-in-1 Dot Matrix - ESP32 MicroPython Scrolling Text
# Upload max7219.py to the ESP32 first
# Wiring: DIN -> GPIO 23, CS -> GPIO 5, CLK -> GPIO 18

from machine import Pin, SPI
import max7219
import time

spi = SPI(2, baudrate=10_000_000, polarity=0, phase=0,
          sck=Pin(18), mosi=Pin(23))
cs  = Pin(5, Pin.OUT)

display = max7219.Matrix8x8(spi, cs, 4)
display.brightness(5)
display.fill(0)

message = " ShillehTek ESP32 MAX7219 "
while True:
    for pos in range(len(message) * 8):
        display.fill(0)
        display.text(message, -pos, 0, 1)
        display.show()
        time.sleep(0.04)