# coding: utf-8

import struct


import time
import mraa


gpio = mraa.Gpio(4)
gpio.dir(mraa.DIR_OUT)
gpio.write(1)

spi = mraa.Spi(0)



for i in range(0,10000):
    

    data = bytearray(2)
    data[0] = 0x68
    data[1] = 0x00

    gpio.write(0)
    recv = spi.write(data)
    gpio.write(1)

    ans = ((recv[0] << 8) + recv[1]) & 0x03FF
    
    print int(ans)

    time.sleep(0.01)