from machine import Pin,SPI
import time
from rotary_irq_rp2 import RotaryIRQ
import max7219

SW = Pin(20, Pin.IN, Pin.PULL_UP)  

r = RotaryIRQ(pin_num_clk=18,
              pin_num_dt=19,
              min_val=0,
              reverse=False,
              range_mode=RotaryIRQ.RANGE_UNBOUNDED) 

val_old = r.value() 

spi0=SPI(0,baudrate=10000000, polarity=1, phase=0, sck=Pin((2)), mosi=Pin((3)))
cs = Pin((5), Pin.OUT)
matrix = max7219.Matrix8x8(spi0, cs , 4)

while True:
    try:
        val_new = r.value()
        if SW.value() == 0:
            print("Button Pressed")
            print("Selected Number is:", val_new)
            while SW.value() == 0:
                continue
        if val_old != val_new:
            val_old = val_new
            print('result =', val_new)

            matrix.fill(0)
            matrix.show()
            matrix.text((f"%4d"%val_new), 0, 0, 1)
            matrix.show()
        time.sleep_ms(50)
    except KeyboardInterrupt:
        break