import spidev
import time
import Adafruit_BBIO.GPIO as GPIO

CS_PIN = 'P9_17'
CLK_PIN = 'P9_22'
MOSI_PIN = 'P9_18'
MISO_PIN = 'P9_21'

GPIO.setup(CS_PIN, GPIO.OUT)
GPIO.setup(CLK_PIN, GPIO.OUT)
GPIO.setup(MOSI_PIN, GPIO.OUT)
GPIO.setup(MISO_PIN, GPIO.IN)

spi = spidev.SpiDev()
spi.open(0, 0)
spi.mode = 0b00
spi.max_speed_hz = 500000

def transfer(send, length):
    receive = spi.xfer2(send)
    return receive


GPIO.output(CLK_PIN, GPIO.LOW)

while True:
    send_data = [0x0A19]
    print(send_data)
    GPIO.output(CS_PIN, GPIO.LOW)  # Set CS low to initiate data transfer
    for byte in send_data:
        for i in range(16):
            GPIO.output(CLK_PIN, GPIO.HIGH)
            if byte & 0x8000:
                GPIO.output(MOSI_PIN, GPIO.HIGH)
            else:
                GPIO.output(MOSI_PIN, GPIO.LOW)
            GPIO.output(CLK_PIN, GPIO.LOW)
            byte <<= 1
    GPIO.output(CS_PIN, GPIO.HIGH)  # Set CS high after data transfer


spi.close()
GPIO.cleanup()