#P2 - program control matrice  8x8 LED cu controler de tip Max 7219
# Conexiuni:

# DIN -pin 15(GP15)
# CS  -pin 17(GP13)
# CLK -pin 14(GP14)

from  machine import Pin, SPI
import time

spi_sck=Pin(14)
spi_tx=Pin(15)
spi=SPI(1,baudrate=10000,sck=spi_sck, mosi=spi_tx)
cs=Pin(13,Pin.OUT,1)
# secventa initializare

cs(0)
spi.write('\x0C')  # activare
spi.write('\x01')
cs(1)            # fr. pozitiv  stocheza datele in Max 7219
cs(0)
spi.write('\x0B')  # scan limit
spi.write('\x07')
cs(1)
cs(0)
spi.write('\x09')  # decode adr.
spi.write('\xFF')
cs(1)
cs(0)
spi.write('\x0A')   # intensity
spi.write('\x07')   # max 0F
cs(1)
# Secventa generare forma

cs(0)
spi.write('\x01')   # adr. coloana 1
spi.write('\x00')   # data jos=MSB
cs(1)
time.sleep(0.001)
cs(0)
spi.write('\x02')   # adr. coloana 2
spi.write('\x0C')   # data
cs(1)
cs(0)
spi.write('\x03')   # adr. coloana 3
spi.write('\x12')
cs(1)
cs(0)
spi.write('\x04')    # adr. coloana 4
spi.write('\x22')
cs(1)
cs(0)
spi.write('\x05')
spi.write('\x44')
cs(1)
cs(0)
spi.write('\x06')
spi.write('\x22')
cs(1)
cs(0)
spi.write('\x07')
spi.write('\x12')
cs(1)
cs(0)
spi.write('\x08')
spi.write('\x0C')
cs(1)

time.sleep(0.2)

# Reglare intensitate luminoasa
while 1:
    for i in range(16):
        cs(0)
        spi.write('\x0A')
        spi.write(bytes([i]))
        #print (i)
        cs(1)
        #cs(0)
        time.sleep(0.1)
    for i in range(15,2,-1):
        cs(0)
        spi.write('\x0A')
        spi.write(bytes([i]))
        cs(1)
        time.sleep(0.1)