====== Lab 04 ======

===== Exercise Objectives =====

  * Introduce SPI communication
  * Use external library to communicate with MAX7219 8x8 LED matrix driver

===== Documents and materials =====

  * MAX7219 
    * {{ :courses:be2m37mam:labs:max7219-max7221.pdf |reference manual}}
    * {{ :courses:be2m37mam:labs:max7219.py |MicroPython library}}, available on [[https://github.com/mcauser/micropython-max7219|github]]
  * Wokwi [[https://wokwi.com/projects/380861562197134337|simulation]]

===== Tasks =====

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

===== Code =====

<code python>
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()
</code>