# Overview

This uses an AVR microcontroller (ATMega328P-PU). 
- Microconroller: https://git.onewaycoding.com/jay/tone-generator
- MIDI parser: https://git.onewaycoding.com/jay/midi-parser

![Project](Project.jpg)

# Pin Description

| Pin(s) | Purpose                          |
|--------|----------------------------------|
| 0-7    | 8-bit DAC (for audio)            |
| 8      | Next button                      |
| 9-10   | LEDs                             |
| 11-13  | ISP Programmer, otherwise unused |
| A0-A3  | Serial: DTR, TXD, RXD, CTS       |
| A4-A5  | I2C: SDA, SCL                    |

# Instruction Set

| ID | Name       | Size | Layout |
|-|-|-|-|
| 0  | stop       | 1    | id (3), empty (5) |
| 1  | setup      | 8    | id (3), us_per_tick (29), amplitude (8), size (24) |
| 2  | set        | 3    | id (3), index (5), frequency (12), mode (2), empty (2) |
| 3  | set-ts     | 5    | id (3), index (5), ticks (18), frequency (12), mode (2) |
| 4  | clear      | 1    | id (3), index (5) |
| 5  | clear-ts   | 4    | id (3), index (5), ticks (18), empty (6) |