# Matrix 8x8
# D1 (GPIO2) ----- CLK
# D2 (GPIO1) ----- CS
# D3 (GPIO3) ----- DIN
# 3V3 ------------ VCC
# GND ------------ GND
import max7219, time
from machine import Pin,SPI

spi = SPI(0, baudrate=80000, sck=Pin(2), mosi=Pin(3), miso=Pin(0))
cs = Pin(1, Pin.OUT)

matrix = max7219.Matrix8x8(spi, cs, 4)

matrix.text('pico',0,0,1)
matrix.show()
time.sleep(3)

while True:
    print("Cycle start")
    # all lit up
    matrix.fill(True)
    matrix.show()
    time.sleep(0.5)

    # all off
    matrix.fill(False)
    matrix.show()
    time.sleep(0.5)

    # one column of leds lit
    print("--- one column ---")
    for i in range(8):
        matrix.pixel(1, i, 1)
        print(i)
    matrix.show()
    time.sleep(0.5)

    # now scroll the column to the right
    print("--- scroll the column ---")
    for j in range(8):
        print(j)
        matrix.scroll(1, 0)
        matrix.show()
        time.sleep(0.5)

    # show a string one character at a time
    print("--- show a string ---")
    adafruit = "Adafruit"
    for char in adafruit:
        matrix.fill(0)
        matrix.text(char, 0, 0)
        matrix.show()
        time.sleep(1.0)

    # scroll the last character off the display
    for i in range(8):
        matrix.scroll(-1, 0)
        matrix.show()
        time.sleep(0.5)

    # scroll a string across the display
    for pixel_position in range(len(adafruit) * 8):
        matrix.fill(0)
        matrix.text(adafruit, -pixel_position, 0)
        matrix.show()
        time.sleep(0.25)