第一步:upgrade dtc comiler ro enable SPI

chmod +x dtc.sh
./dtc.sh

第二步:install Adafruit‘s BeagleBone IO Python Library

sudo ntpdate pool.ntp.org
sudo apt-get update
sudo apt-get install build-essential python-dev python-pip python-smbus -y
git clone git://github.com/adafruit/adafruit-beaglebone-io-python.git
cd adafruit-beaglebone-io-python
sudo python setup.py install
cd ..
sudo rm -rf adafruit-beaglebone-io-python