Lab 04

• Introduce SPI communication
• Use external library to communicate with MAX7219 8×8 LED matrix driver

• MAX7219
  • reference manual
  • MicroPython library, available on github
• Wokwi simulation

1. Upload library into RPi Pico
2. Try simple communication over SPI bus
3. Try methods from the library to create more advanced display actions (animation, etc.)
4. Optional: use both matrix display and matrix keyboard to display pressed key

import max7219
from machine import Pin, SPI
 
spi = SPI(1)
 
display = max7219.Matrix8x8(spi, Pin('X5'), 1)
display.text('1',0,0,1)
display.show()