This repository contains hardware implementations and hardware components for gopi and some example programs in the cmd folder. The repository depends on golang version 1.11 and above (in order to support modules). For Linux support, Raspbian GNU/Linux v9 has been tested and for Mac support.

The gopi components provided by this repository are:

In addition to these general interfaces, the repository contains golang bindings for underlying libraries:

In order to build, pkg-config is required. For the Raspberry Pi, the configuration files are located under /opt/vc/lib/pkg-config so set the environment variable as follows:

bash% PKG_CONFIG_PATH="/opt/vc/lib/pkgconfig"
bash% go install -tags rpi ./cmd/...

There is a makefile which can be used for testing and installing bindings and examples, on a per-platform basis:

bash% make linux   # makes for generic linux
bash% make darwin  # makes for MacOS
bash% make rpi     # makes for Raspberry Pi

The resulting binaries are as follows. Use the -help flag to see the different options for each:

• hw_list Provide information on hardware capabilities
• gpio_ctrl Control the GPIO interface
• i2c_detect Detect I2C devices
• lirc_receive Display IR pulses from an IR device
• pwm_ctrl Control PWM signals on the GPIO interface
• spi_ctrl Control SPI communication
• mmal_camera_preview Preview the camera output on the screen
• mmal_encode_image Demonstrates image decoding and encoding using the GPU
• mmal_video_preview Demonstrates playback of a H264 video on the screen using the GPU
• fsnotify List file & folder changes under one or more folders

More information about the individual components implemented in this repository will be forthcoming later!