SPI & I2C Slave Controller for Multiple Boards

Tony Brewer, forum user tonton81 developed a library for a master board to control multiple slave boards.

This library allows you to take advantage of the speed of SPI when communicating between 2 Teensys, making it much faster than ordinary serial.

The lengthy forum thread where this library was developed documents the collaborative effort that made it happen.

The code, along with some details on the features, can be found on GitHub.