By Sungho Lee (sungholee3526@gmail.com)
Pins on 12-pin box header on the encoder boarder is numbered as below with the orientation key at the top.
| 11 | 9 | 7 | 5 | 3 | 1 |
| 12 | 10 | 8 | 6 | 4 | 2 |
| Pin | Description |
|---|---|
| 1 | Speaker (UNUSED) |
| 2 | Speaker (UNUSED) |
| 3 | GND |
| 4 | GND |
| 5 | UART RX (3.3V) |
| 6 | UART TX (3.3V) |
| 7 | VCC (3.3V) |
| 8 | GND |
| 9 | Trackball (UNUSED) |
| 10 | Trackball (UNUSED) |
| 11 | Power Switch On |
| 12 | GND |
Remember RX connects to host TX and TX connects to host RX.
Power off signal is carried through serial data and is not exposed on the box header.
Host sends three bytes to request data.
A6 01 00
Encoder responds to the poll request with 18 byte data.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
a7 |
10 |
System Buttons | 01 |
P1 Joystick | P1 Buttons | 00 |
02 |
P2 Joystick | P2 Buttons | 00 |
03 |
P3 Joystick | P3 Buttons | 00 |
04 |
P4 Joystick | P4 Buttons |
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
0 |
0 |
0 |
Live! | Power On | Power Off | Volume 0 | Volume 1 |
Volume control is different from all other inputs. Two bits need to be considered together.
00: Volume -
01: Neutual position
10: Volume +
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
0 |
0 |
Start | 0 |
Up | Left | Down | Right |
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
0 |
0 |
0 |
C | A | X | 0 |
B |