from machine import Pin, SPI
from max7219 import Max7219
from time import sleep_ms

# SPI setup
spi = SPI(1,
          baudrate=10000000,
          polarity=0,
          phase=0,
          sck=Pin(19),
          mosi=Pin(23))

cs = Pin(18, Pin.OUT)

# 32x8 display (4 modules in a row)
display = Max7219(64, 8, spi, cs, rotate_180=True)
display.brightness(8)

def scroll_text_vertical(text):
    display.fill(0)
    length = 8  # height of one character (8 pixels)

    # --- Scroll UP to DOWN ---
    for pos in range(length + 8):
        display.fill(0)
        display.text(text, 0, pos - 8)   # move text along Y-axis
        display.show()
        sleep_ms(150)

    # --- Scroll DOWN to UP ---
    for pos in range(length + 8):
        display.fill(0)
        display.text(text, 0, 8 - pos)   # reverse direction
        display.show()
        sleep_ms(150)

while True:
    scroll_text_vertical("PRIYAPANDI")