import time
import spidev

bus=1
device=0

spi=spidev.SpiDev()

spi.open(bus,device)

spi.max_speed_hz = 250000
spi.mode = 0


oldstate=0

while True:
    data=spi.xfer2([0x55]*2, spi.max_speed_hz, 1000, 8)
    state=data[0]<<8 + data[1]

    #data.extend(spi.xfer([0x55], spi.max_speed_hz, 100))

#    if state != oldstate:
    print(' '.join([format(d,'08b') for d in data]))
    oldstate=state
#    time.sleep(1/200)