mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-11-29 22:45:51 +00:00
90 lines
2.4 KiB
Markdown
90 lines
2.4 KiB
Markdown
# Sun to USB keyboard protocol converter
|
|
|
|
A converter for using non-USB Sun keyboards.
|
|
|
|
Original code from the [TMK firmware](https://github.com/tmk/tmk_keyboard/tree/master/converter/sun_usb). Ported to QMK by [Yann Hodique](https://github.com/sigma).
|
|
|
|
Keyboard Maintainer: [Yann Hodique](https://github.com/sigma)
|
|
Hardware Supported: See hardware section below
|
|
Hardware Availability: self-built
|
|
|
|
Make example for this keyboard (after setting up your build environment):
|
|
|
|
make converter/sun_usb/type5:default
|
|
|
|
See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.
|
|
|
|
|
|
## Hardware
|
|
|
|
Target MCU is ATMega32u4 but other USB capable AVR will also work. The maintainer mostly uses Teensy 2.0 boards.
|
|
Supported keyboards: Sun Type 3 and 5 Keyboards,
|
|
|
|
### Connector
|
|
|
|
8Pin mini DIN
|
|
|
|
___ ___
|
|
/ |_| \
|
|
/ 8 7 6 \
|
|
| 5 4 3 |
|
|
\_ 2 1 _/
|
|
\_____/
|
|
(receptacle)
|
|
|
|
|
|
Wiring:
|
|
|
|
Pin mini DIN MCU
|
|
----------------------------------
|
|
1 GND GND
|
|
2 GND GND
|
|
3 5V
|
|
4 RX/TX(Mouse)
|
|
5 RX PD3
|
|
6 TX PD2
|
|
7 GND GND
|
|
8 5V VCC
|
|
|
|
|
|
### Protocol
|
|
|
|
Signal: Asynchronous, Negative logic, 1200baud, No Flow control
|
|
Frame format: 1-Start bit, 8-Data bits, No-Parity, 1-Stop bit
|
|
|
|
AVR USART engine expects positive logic while Sun keyboard signal is negative.
|
|
To use AVR UART engine you need external inverter in front of RX and TX pin.
|
|
Otherwise you can software serial routine to communicate the keyboard.
|
|
|
|
This converter uses software method, you doesn't need any inverter part.
|
|
|
|
|
|
Commands From System To Keyboard
|
|
|
|
0x01 Reset
|
|
Keyboard responds with following byte sequence:
|
|
Success: 0xFF 0x04 0x7F
|
|
Fail: 0x7E 0x01 0x7F
|
|
0x02 Bell On
|
|
0x03 Bell Off
|
|
0x0A Click On
|
|
0x0B Click Off
|
|
0x0E LED
|
|
followed by LED status byte:
|
|
bit: 3 2 1 0
|
|
LED: CapsLk ScrLk Compose NumLk
|
|
0x0F Layout
|
|
Keyboard responds with 'Layout Response' 0xFE 0xXX
|
|
|
|
Commands From Keyboard To System
|
|
|
|
0x7F Idle
|
|
means no keys pressed.
|
|
0xFE Layout Response
|
|
0xFF Reset Response(followed by 0x04)
|
|
|
|
References
|
|
|
|
* http://kentie.net/article/sunkbd/page2.htm
|
|
* http://kentie.net/article/sunkbd/KBD.pdf
|