TACHYON hardware: Using touch keys and I2C I/O expanders
Peter Jakacki
Posts: 10,193
Here are two new source code documents that show how to interface the touch keys on the QuickStart board or even your own touch keys (two pins) as well as using some general-purpose I2C I/O expanders. The bookmark to the Tachyon Forth Resource Links page <is here>
- Quick Start touch keys
How to read a single or multiple "touch" keys in realtime or just-in-time. - PCF8574 & xxx9554 I2C I/O
These are pretty simple to interface to but shows you how to do it.