SALED - Serially Addressed Light Emitting Diodes

Design

The design utilizes 3 discrete concepts and 4 distinct component steps.

Concepts

• LED
• Panel
• Output

Component Steps

• Configuration
• Generation
• Conversion
• Buffering

LED

LED IC being used. There are LED drivers which can be programmed in any language to read a framebuffer from STDIN and converted to the LED signaling for a specific bus and pushed to STDOUT.

Panel

Panel or aggregate of LEDs. The description is defined in a configuration file that determines the width, height, bit depth, and other defining features.

Output

Bus which the converted LED signals are pushed to such as SPI and UART. This includes specific configuration for signaling tricks to generate proper waveforms.

Configuration

INI files used to configure the LED/panel generators, converters, and output buffers.

Generation

Generates a frame which is the complete data set for the panel usually in RGB format.

Conversion

Converts the frame into LED and bus specific data to be sent.

Buffering

Utilize standard Linux facilities for input and output buffering to mitigate some data availability jitters.

Pre-Requisites

• Bash
• PHP-CLI
• libretech-wiring-tool

LEDs Supported

• WS2812X
• SK9822
• APA102

License

GPL-2