GPIO bit-bang driver for Linux

The GPIO bit-bang driver creates an interface to Linux GPIOs using the IOCTL API.

Basic 1-bit input and output is available along with accelerated multiple bit shift I/O.

GPIO bit-bang is well suited to PICMicro ICSP but not exclusively.

Raspbian for Raspberry Pi

First install development tools and the kernel headers.

apt-get install raspberrypi-kernel-headers

Now install the kernel module.

hg clone http://hg.kewl.org/pub/gpio-bb
cd gpio-bb
make
make install

Void Linux for Raspberry Pi

First install development tools and the kernel headers.

xbps-install mercurial make gcc rpi-kernel-headers 

Now install the kernel module.

hg clone http://hg.kewl.org/pub/gpio-bb
cd gpio-bb
./rpi-void.sh

Bananian for Banana Pi

Install development tools and the kernel headers and then install the kernel module.

hg clone http://hg.kewl.org/pub/gpio-bb
cd gpio-bb
./bpi-bananian.sh

Armbian for Orange Pi Zero

Install development tools and then install the kernel module.

hg clone http://hg.kewl.org/pub/gpio-bb
cd gpio-bb
make
make install

Configuration

Update the modprobe configuration to create the gpio-bb device node when the module is loaded. For example, add the following to /etc/modprobe.d/modprobe.conf

install gpio-bb modprobe --ignore-install gpio-bb && modprobe gpio-bb && mknod /dev/gpio-bb c 180 0 && chmod 666 /dev/gpio-bb

Lastly, add the following to /etc/modules and reboot.

gpio-bb

OpenWRT

Raspbian for Raspberry Pi (obsolete)

Troubleshooting

gpio-bb uses the kernel API to access pins, this API demands exclusive access to a pin per process. This means you cannot use gpio-bb and sysfs export simultaneously for a single pin.

Resources