32 lines
1.1 KiB
Markdown
32 lines
1.1 KiB
Markdown
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# Overview
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This uses an AVR microcontroller (ATMega328P-PU).
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- Microconroller: https://git.onewaycoding.com/jay/tone-generator
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- MIDI parser: https://git.onewaycoding.com/jay/midi-parser
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# Pin Description
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| Pin(s) | Purpose |
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|--------|----------------------------------|
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| 0-7 | 8-bit DAC (for audio) |
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| 8 | Next button |
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| 9-10 | LEDs |
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| 11-13 | ISP Programmer, otherwise unused |
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| A0-A3 | Serial: DTR, TXD, RXD, CTS |
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| A4-A5 | I2C: SDA, SCL |
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# Instruction Set
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| ID | Name | Size | Layout |
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|-|-|-|-|
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| 0 | stop | 1 | id (3), empty (5) |
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| 1 | setup | 8 | id (3), us_per_tick (29), amplitude (8), size (24) |
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| 2 | set | 3 | id (3), index (5), frequency (12), mode (2), empty (2) |
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| 3 | set-ts | 5 | id (3), index (5), ticks (18), frequency (12), mode (2) |
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| 4 | clear | 1 | id (3), index (5) |
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| 5 | clear-ts | 4 | id (3), index (5), ticks (18), empty (6) |
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