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[tmk_keyboard.git] / converter / sun_usb / README
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97ee1be5 1Sun to USB keyboard protocol converter
2======================================
b56717b8 3Target MCU is ATMega32u4 but other USB capable AVR will also work.
4Supported keyboards: Sun Type 5 Keyboard, CTCSP SHORT TYPE KEYBOARD(CKUB)
5
6CTCSP SHORT TYPE KEYBOARD: http://imgur.com/a/QIv6p
97ee1be5 7
97ee1be5 8
9
97ee1be5 10
11Connector
b56717b8 12---------
97ee1be5 13 8Pin mini DIN
14 ___ ___
15 / |_| \
16 / 8 7 6 \
17 | 5 4 3 |
18 \_ 2 1 _/
19 \_____/
20 (receptacle)
21
b56717b8 22 Wiring:
23 Pin mini DIN MCU
24 ----------------------------------
25 1 GND GND
26 2 GND GND
27 3 5V
28 4 RX/TX(Mouse)
29 5 RX PD3
30 6 TX PD2
31 7 GND GND
32 8 5V VCC
97ee1be5 33
34
b56717b8 35Protocol
97ee1be5 36--------
3ee5f565 37Signal: Asynchronous, Negative logic, 1200baud, No Flow control
b56717b8 38Frame format: 1-Start bit, 8-Data bits, No-Parity, 1-Stop bit
39
40 AVR USART engine expects positive logic while Sun keyboard signal is negative.
3ee5f565 41 To use AVR UART engine you need external inverter in front of RX and TX pin.
b56717b8 42 Otherwise you can software serial routine to communicate the keyboard.
43
44This converter uses software method, you doesn't need any inverter part.
45
46
47Commands From System To Keyboard
48 0x01 Reset
49 Keyboard responds with following byte sequence:
50 Success: 0xFF 0x04 0x7F
51 Fail: 0x7E 0x01 0x7F
52 0x02 Bell On
53 0x03 Bell Off
54 0x0A Click On
55 0x0B Click Off
56 0x0E LED
57 followed by LED status byte:
58 bit: 3 2 1 0
59 LED: CapsLk ScrLk Compose NumLk
60 0x0F Layout
61 Keyboard responds with 'Layout Response' 0xFE 0xXX
62
63Commands From Keyboard To System
64 0x7F Idle
65 means no keys pressed.
66 0xFE Layout Response
67 0xFF Reset Response(followed by 0x04)
68
69Reference
70 http://kentie.net/article/sunkbd/page2.htm
71 http://kentie.net/article/sunkbd/KBD.pdf
72
73
74Build Firmware
75--------------
76Just use 'make'
97ee1be5 77 $ cd sun_usb
78 $ make
b56717b8 79Then, load the binary to MCU with your favorite programmer.
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