# Import MicroPython libraries of PIN and SPI
from machine import Pin, SPI
# Import MicoPython max7219 library
import max7219

# Import time
import time
"""
    >>> from machine import Pin, SPI
    >>> from max7219 import Max7219
    >>> spi = SPI(1, baudrate=10000000)
    >>> screen = Max7219(32, 16, spi, Pin(15))
    >>> screen.rect(0, 0, 32, 16, 1)  # Draws a frame
    >>> screen.text('Hi!', 4, 4, 1)
    >>> screen.show()
"""

#Intialize the SPI
spi = SPI(0, baudrate=10000000, polarity=1, phase=0, sck=Pin(2), mosi=Pin(3))
ss = Pin(5, Pin.OUT)
# Create matrix display instant, which has four MAX7219 devices.
display = max7219.Max7219(32,8,spi, ss,rotate_180=True)

display.text('1234',0,0,1)
display.show()

time.sleep(1)

#Set the display brightness. Value is 1 to 15.
display.brightness(10)
#Define the scrolling message
scrolling_message = "RASPBERRY PI PICO AND MAX7219 -- 8x8 DOT MATRIX SCROLLING DISPLAY"
#Get the message length
length = len(scrolling_message)
#Calculate number of columns of the message
column = (length * 8)
#Clear the display.
display.fill(0)
display.show()
#sleep for one one seconds
time.sleep(1)
# Unconditionally execute the loop
while True:
    for x in range(32, -column, -1):     
        #Clear the display
        display.fill(0)
        # Write the scrolling text in to frame buffer
        display.text(scrolling_message ,x,0,1)
        
        #Show the display
        display.show()
      
        #Set the Scrolling speed. Here it is 50mS.
        time.sleep(0.05)