bsb_io

Simple python module to interact with BlackSwift GPIO. Based on articles by BlackSwift developers: on wiki and on habrahabr. This module uses fast "direct gpio register access" method. It means that this library is working with AR9331's registers directly. Use it with care.

Installing

1. Download .ipk from releases tab or build it yourself (see section below)
2. Copy it to your BlackSwift
3. Run opkg install bsb_io

Building.

1. Download and install OpenWrt SDK from the second article
2. Clone this repo to packages directory of OpenWrt SDK.
3. In make menuconfig section Languages-> in subsection Python-> select bsb_io
4. Run make if you want to build whole distribution or make package/bsb_io/install to build only bsb_io with dependencies.
5. Locate .ipk in bin/ar71xx/packages/base/

N.B. This module can be built with Cython 0.11 (Used by current OpenWrt BarrierBreaker Buildroot). If version of Cython in your Buildroot is higher, you would probably need to change setup.py.

Usage

There is only one class Pin. It's constructor accepts GPIO number. You can change GPIO direction (input or output) by writing direction property. You can read and write GPIO using value property. You can modify pin state i.e. both value and direction using state propery.

This code toggles GPIO1 every 2 seconds:

import time
from bsb_io import *

p1 = Pin(1)
p1.direction = OUTPUT
v = 1
while True:
    if v==1:
        v = OFF
        print "[OFF]\r"
    else:
        v = ON
        print "[ON ]\r"
    p1.value = v
    time.sleep(2)

TODO

• Implement simple, yet configurable soft PWM.
• Implement slow gpio method via SysFs