from machine import Pin, SPI

# Pins
pin_reset = Pin(16, Pin.OUT)
pin_done  = Pin(21)
pin_miso  = Pin(5)
pin_mosi  = Pin(17, Pin.OUT)
pin_sck   = Pin(19, Pin.OUT) 
pin_ss    = Pin(18, Pin.OUT)

# SPI bus
spi = SPI(1, baudrate=1000000, sck=pin_sck, mosi=pin_mosi, miso=pin_miso)

def program(data):
    # Reset the ICE40 into SPI slave download mode
    pin_reset.value(0) # FPGA into RESET
    pin_ss.value(0)    # Hold down SS pin
    pin_reset.value(1) # Take FPGA out of RESET

    print("Writing...")

    position = 0
    length   = len(data)
    while True:
        if position >= length:
            break
        spi.write(data[position:position+128])
        position += 128

    print("Sending dummy bytes...")
    spi.write(bytes([0]*100))

    print("Done")

def run():	
	with open('rgb.bin', 'r') as myfile:
		data = myfile.read()
	program(data)