PiPCA9685

PiPCA9685 provides an interface for controlling a PCA8695 chip from a Raspberry Pi in C++ and Python.

This library was originally designed to control servos with Adafruit's PWM Hat. It was born out of a desire for C++ bindings, which Adafruit's library lacks.

Installation

1. Before you begin, make sure your Pi has I2C enabled.

   1. Run sudo raspi-config
   2. Select "Interfacing Options"
   3. Enable I2C automatic loading

2. Clone repo

   git clone https://github.com/barulicm/PiPCA9685.git

3. Install dependencies from apt

   cd PiPCA9685
   xargs -a apt_dependencies.txt sudo apt-get install -y

4. Finally, build and install the library

   cmake -B build
   cmake --build build
   sudo cmake --install build
   cmake --build build --target install_python

NOTE: PiPCA9685 will default to installing the Python library for Python 3. If you'd like to use a different version, you can specify the version in the call to cmake.

cmake -DPYBIND11_PYTHON_VERIONS 2.7 ..

Examples

You can find simple examples of how to use this library in C++ and Python in the examples directory.

C++

To build and run the C++ example, run the following commands in the examples/cpp/ directory.

cmake -B build
cmake --build build
./build/example-cpp

Python

To run the Python example, run the following command in the examples/python/ directory.

python3 example.py