Examples which demonstrate the use of Raspberry Pi and GPIO.

Of interest are those written in rust. Among these, the MIDI Light Show example is the most mature.

We used the following configuration for the button example:

There are Fritzing diagrams available for these examples in the doc folder.

You can download Fritzing here.

Basic push buttons have legs which are bent by default. This is helpful for soldering the buttons onto actual build, but makes it difficult to get the button pushed into the breadboard.

We used a pair of pliers to straighten out the pins on the button, and made sure that we pushed the button all the way down into the bread board. This allowed us to establish connectivity with the button after an initial period of failure.

• https://www.rs-online.com/designspark/raspberry-pi-camera-setup
• https://thepihut.com/blogs/raspberry-pi-tutorials/16021420-how-to-install-use-the-raspberry-pi-camera

Linux GPIO subsystem documentation can be found at

• top level
• consumer interface for C programs
• legacy interface using /sys/class/gpio

We included some helper scripts, available in the helpers directory, which you can use to unexport pins which are still held in user space after killing your app, or to test setting the output value for a set of pins.

These scripts use the legacy GPIO interface found in /sys/class/gpio, so if you're making an effort to understand the C API for GPIO, please make sure that you refer to the updated documentation.