def setup_spi():
logger.debug("SPI setup")
spi = SpiDev()
spi.open(bus=0, device=0)
spi.max_speed_hz = 1000000
spi.bits_per_word = 8
spi.loop = False
spi.mode = 3
spi.no_cs = True
return spi
def read_touch_screen(channel):
"""Read the HackPack touchscreen coordinates."""
spi = SpiDev()
spi.open(1, 0)
spi.no_cs = True
spi.max_speed_hz = 2000000
# Manual chip select
GPIO.output(CS_TOUCH, 1)
GPIO.output(CS_TOUCH, 0)
responseData = spi.xfer([channel, 0, 0])
GPIO.output(CS_TOUCH, 1)
spi.close()
return (responseData[1] << 5) | (responseData[2] >> 3)
