• Willow is an application framework based on message passing finite state machines, known as tasks.

Here are two examples that demonstrate the technique:-

1. Goat is a high voltage parallel programmer for the ATmega328P. It features a zero insertion force socket that accepts an unmounted device, and has proved itself useful in reviving unresponsive devices.

2. Zara is a string of eight ATmega328P devices connected via the two wire interface:-

   • bali provides the primary HC-05 Bluetooth interface, a command line interpreter, in-system programming and in-circuit serial programming to the seven other devices.

   • fido provides a scripted keypad, utilities for managing an RV-3028-C7 real time clock, and a BMP180 barograph process director.

   • iowa provides a secondary HC-05 Bluetooth interface, in-circuit serial programming for bali, and file system utilities.

   • lima manages an I2C OLED screen and provides display services.

   • oslo manages an SDCard and provides a stateless file server.

   • peru manages an SPI OLED screen and provides display services.

   • pisa manages an MCP4728 Quad DAC and an AD7124 24-bit ADC and provides precision voltage generation and measurement.

   • sumo manages a 2 line 16 character LCD screen and provides display services.

• The lib directory contains tasks and headers that can be shared between applications.

This is a work in progress, with this repository acting as a remote backup.