This is a set of Python tools to allow GPIO, PWM, and ADC (coming soon) access on the BeagleBone using the Linux 3.8 Kernel and above (latest releases).
It has been tested on the 5-20 and 6-6 Angstrom image on the BeagleBone Black.
git clone git://github.com/adafruit/adafruit-beaglebone-io-python.git
#set the date and time
/usr/bin/ntpdate -b -s -u pool.ntp.org
#install dependency
opkg update && opkg install python-distutils
cd adafruit-beaglebone-io-python
python setup.py install
Using the library is very similar to the excellent RPi.GPIO library used on the Raspberry Pi. Below are some examples.
Import the library, and setup as GPIO.OUT or GPIO.IN
import BBIO.GPIO as GPIO
GPIO.setup("P8_14", GPIO.OUT)
You can also refer to the pin names:
GPIO.setup("GPIO0_26", GPIO.OUT)
Setup the pin for output, and write GPIO.HIGH or GPIO.LOW. Or you can use 1 or 0.
import BBIO.GPIO as GPIO
GPIO.setup("P8_14", GPIO.OUT)
GPIO.output("P8_14", GPIO.HIGH)
Inputs work similarly to outputs.
import BBIO.GPIO as GPIO
GPIO.setup("P8_14", GPIO.IN)
Polling inputs:
if GPIO.input("P8_14"):
print("HIGH")
else:
print("LOW")
Waiting for an edge (GPIO.RISING, GPIO.FALLING, or GPIO.BOTH:
GPIO.wait_for_edge(channel, GPIO.RISING)
Detecting events:
GPIO.add_event_detect("P9_12", GPIO.FALLING)
#your amazing code here
#detect wherever:
if GPIO.event_detected("P9_12"):
print "event detected!"
import BBIO.PWM as PWM
#PWM.start(channel, duty, freq=2000)
#duty values are valid 0-100
PWM.start("P9_14", 50)
PWM.set_duty_cycle("P9_14", 25.5)
PWM.set_frequency("P9_14", 10)
PWM.disable("P9_14")
PWM.cleanup()
Install py.test to run the tests. You'll also need the python compiler package for py.test.
opkg update && opkg install python-compiler
#Either pip or easy_install
pip install -U pytest
easy_install -U pytest
Execute the following in the root of the project:
py.test
The BeagleBone IO Python library was originally forked from the excellent MIT Licensed RPi.GPIO library written by Ben Croston.
Written by Justin Cooper, Adafruit Industries. BeagleBone IO Python library is released under the MIT License.
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