For Arduino based PS/2 Amiga mouse driver please refer to the original repository: https://github.com/paulroberthill/AmigaPS2Mouse
Altough majority of functionality is taken over from the original design, it does not support PS/2 Arduino based controller, but MSP430 based mouse controller that uses AVAGO sensor. For microcontroller please refer to the external repository: https://github.com/sq7bti/AVAGO/
The Middle mouse button is emulated, it does not use the real middle mouse button pin. This is because this pin is used for communication between the Amiga and a mouse for scroll wheel etc.
Source code is based on the code prepared by nogginthenog. https://github.com/paulroberthill/AmigaPS2Mouse
Mouse controller sends code through four quadrature signals. Synchronisation with Amiga driver occurs at the falling edge of MMB pin.
| joy0dat | xor | swap | X | Hamm | * | |||
|---|---|---|---|---|---|---|---|---|
| 0x21 | 1001 | 1101 | D | 1110 | E | 3 | CODE_MMB_UP | |
| 0x23 | 1011 | 1110 | E | 1101 | D | 3 | CODE_MMB_DOWN | |
| 0x32 | 1110 | 1011 | B | 1011 | B | 3 | CODE_WHEEL_UP | |
| 0x12 | 0110 | 0111 | 7 | 0111 | 7 | 3 | CODE_WHEEL_DOWN | |
| 0x31 | 1101 | 1001 | 9 | 1010 | A | 2 | * | CODE_WHEEL_LEFT |
| 0x13 | 0111 | 0110 | 6 | 0101 | 5 | 2 | * | CODE_WHEEL_RIGHT |
| 0x33 | 1111 | 1010 | A | 1001 | 9 | 2 | * | CODE_4TH_UP |
| 0x20 | 1000 | 1100 | C | 1100 | C | 2 | CODE_4TH_DOWN | |
| 0x11 | 0101 | 0101 | 5 | 0110 | 6 | 2 | * | CODE_5TH_UP |
| 0x02 | 0010 | 0011 | 3 | 0011 | 3 | 2 | CODE_5TH_DOWN |
- joy0dat - code read from hardware register (after xor'ing with previously read value)
- xor - xor applied on bits X0 and X1 (Y0 and Y1) - see elowar for details
- swap - position Y0 and Y1 swapped
- Hamm - code hamming distance
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- problematic codes - potential occurrence when traditional mouse connected.
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