from machine import Pin, SPI
import framebuf
import time
time.sleep(0.1)

# Variables 
NOMBRE="LEANDRO" 

class MAX7219:
    def __init__(self, width, height, spi, cs):
        self.spi = spi
        self.cs = cs
        self.width = width
        self.height = height
        self.buffer = bytearray(width * height // 8)
        self.fb = framebuf.FrameBuffer(self.buffer, width, height, framebuf.MONO_HLSB)
        self.cs.init(Pin.OUT, value=1)
        self.write_cmd(0x09, 0x00)  
        self.write_cmd(0x0B, 0x07)  
        self.write_cmd(0x0A, 0x03)  
        self.write_cmd(0x0C, 0x01)  
        self.write_cmd(0x0F, 0x00)  
        self.fill(0)
        self.show()
    def write_cmd(self, cmd, data):
        self.cs.value(0)
        self.spi.write(bytearray([cmd, data]))
        self.cs.value(1)
    def fill(self, val):
        self.fb.fill(val)
    def text(self, string, x, y):
        self.fb.text(string, x, y, 1)
    def show(self):
        for row in range(8):
            self.cs.value(0)
            self.spi.write(bytearray([row + 1, self.buffer[row]]))
            self.cs.value(1)
spi=SPI(0, baudrate=10000000, polarity=0, phase=0, sck=Pin(18), mosi=Pin(19))
cs=Pin(17, Pin.OUT)

display=MAX7219(8, 8, spi, cs)
ancho_texto=len(NOMBRE) * 8
while True:
    for x in range(8, -ancho_texto, -1):
        display.fill(0)
        display.text(NOMBRE, x, 0)
        display.show()
        time.sleep(0.1)