Hi all,
I'm new the BBB and have taken one college course in programming. Intro to
programming using Python3. I wanted to program the BBB using Python3, but
ran into the issue that Adafruit's module was Python 2.7. I struggled with
this for a while, until I came across a post by Joran B. on another
website. He provided a bit of code to simply use the GPIO directly in
Python3. I'm sure it's obvious to the advanced users, but I found his post
very useful. His code didn't work for me at first, but I was able to add a
few lines and get it working. I've attached the file. Now I just simply
import it (add “from gpio import SimpleGPIO” to the beginning of my python
code) and it works great. I learned a ton about how to access and use the
GPIO by going through the code in his post and getting it to work. Any
other newbies wanted to do something similar, I've attached the file for
reference as well as an example of where I used it during my test. Please
note, I haven't tested the xxx.read() method. Just turned on and off an LED
so far.
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import os
class SimpleGPIO:
def __init__(self,gpio_pin):
self.gpio_pin = gpio_pin
os.system('echo %d > /sys/class/gpio/export'%self.gpio_pin)
self.gpio_path = "/sys/class/gpio/gpio%d/"%gpio_pin
with open(self.gpio_path+"direction") as f:
self.direction = f.read()
def write(self,value):
if self.direction != "out":
os.system("echo out > %sdirection"%self.gpio_path)
self.direction = "out"
os.system("echo %s > %svalue"%(value, self.gpio_path))
def read(self):
if self.direction != "in":
os.system("echo in > %sdirection"%self.gpio_path)
self.direction = "in"
with open(self.gpio_path+value) as f:
return f.read()
gpio_67 = SimpleGPIO(67)
gpio_67.write('high')
from gpio import SimpleGPIO
gpio_67 = SimpleGPIO(67)
gpio_67.write('high')
