ADB keyboard LEDs support

This commit is contained in:
tmk 2011-01-13 22:46:57 +09:00
parent 40c24dc89a
commit 06db39583f
5 changed files with 60 additions and 13 deletions

43
ADB.txt
View file

@ -3,11 +3,14 @@ ADB Protocol
Resources
---------
ADB - The Untold Story: Space Aliens Ate My Mouse
http://developer.apple.com/legacy/mac/library/#technotes/hw/hw_01.html
Apple IIgs Hardware Reference Second Edition [p80(Chapter6 p121)]
ftp://ftp.apple.asimov.net/pub/apple_II/documentation/Apple%20IIgs%20Hardware%20Reference.pdf
ADB Keycode
http://72.0.193.250/Documentation/macppc/adbkeycodes/
http://m0115.web.fc2.com/m0115.jpg
[Inside Macintosh volume V, pages 191-192]
ADB Signaling
http://kbdbabel.sourceforge.net/doc/kbd_signaling_pcxt_ps2_adb.pdf
ADB Overview & History
@ -61,9 +64,9 @@ Commands
3: mice
Registers:
0: application(keyobard/mice use to store its data.)
0: application(keyobard uses this to store its data.)
1: application
2: application
2: application(keyboard uses this for LEDs and state of modifiers)
3: status and command
@ -111,15 +114,17 @@ Communication
keep low for 300us to request.
Keyboard data(register0)
This 16bit data can contains 2 keycodes and 2 released flags.
First keycode is palced in upper nibble. When one keyocode is sent,
lower nibble is 0xFF.
Keyboard Data(Register0)
This 16bit data can contains two keycodes and two released flags.
First keycode is palced in upper byte. When one keyocode is sent,
lower byte is 0xFF.
Release flag is 1 when key is released.
15 14 . . . . . 8 7 6 . . . . . 0
| |keycode1 | |keycode2
|released(1) |released(1)
1514 . . . . . 8 7 6 . . . . . 0
| | | | | | | | | +-+-+-+-+-+-+- Keycode2
| | | | | | | | +--------------- Released2(1 when the key is released)
| +-+-+-+-+-+-+----------------- Keycode1
+------------------------------- Released1(1 when the key is released)
Keycodes:
Scancode consists of 7bit keycode and 1bit release flag.
@ -131,4 +136,24 @@ Keyboard data(register0)
the switch has a special scancode 0x7F7F, so you can
also read from Data line. It uses 0xFFFF for release scancode.
Keyboard LEDs & state of keys(Register2)
This register hold current state of three LEDs and nine keys.
The state of LEDs can be changed by sending Listen command.
1514 . . . . . . 7 6 5 . 3 2 1 0
| | | | | | | | | | | | | | | +- LED1(NumLock)
| | | | | | | | | | | | | | +--- LED2(CapsLock)
| | | | | | | | | | | | | +----- LED3(ScrollLock)
| | | | | | | | | | +-+-+------- Reserved
| | | | | | | | | +------------- ScrollLock
| | | | | | | | +--------------- NumLock
| | | | | | | +----------------- Apple/Command
| | | | | | +------------------- Option
| | | | | +--------------------- Shift
| | | | +----------------------- Control
| | | +------------------------- Reset/Power
| | +--------------------------- CapsLock
| +----------------------------- Delete
+------------------------------- Reserved
END_OF_ADB

19
adb.c
View file

@ -42,9 +42,9 @@ uint16_t adb_host_kbd_recv(void)
{
uint16_t data = 0;
attention();
send_byte(0x2C); // Addr:2, Cmd:talk(11), Reg:0(00)
place_bit0(); // Stopbit
if (!wait_data_lo(0xFF)) // Stop to Start(140-260us)
send_byte(0x2C); // Addr:Keyboard(0010), Cmd:Talk(11), Register0(00)
place_bit0(); // Stopbit(0)
if (!wait_data_lo(0xFF)) // Tlt/Stop to Start(140-260us)
return 0; // No data to send
if (!read_bit()) // Startbit(1)
return -2;
@ -55,6 +55,19 @@ uint16_t adb_host_kbd_recv(void)
return data;
}
// send state of LEDs
void adb_host_kbd_led(uint8_t led)
{
attention();
send_byte(0x2A); // Addr:Keyboard(0010), Cmd:Listen(10), Register2(10)
place_bit0(); // Stopbit(0)
_delay_us(200); // Tlt/Stop to Start
place_bit1(); // Startbit(1)
send_byte(0); // send upper byte (not used)
send_byte(led&0x07); // send lower byte (bit2: ScrollLock, bit1: CapsLock, bit0: NumLock)
place_bit0(); // Stopbit(0);
}
static inline void data_lo()
{

1
adb.h
View file

@ -14,5 +14,6 @@
void adb_host_init(void);
bool adb_host_psw(void);
uint16_t adb_host_kbd_recv(void);
void adb_host_kbd_led(uint8_t led);
#endif

View file

@ -1,8 +1,10 @@
ADB to USB keyboard converter
=============================
http://geekhack.org/showwiki.php?title=Island:14290
This firmware converts ADB keyboard protocol to USB.
Build
-----
0. Connect ADB keyboard to Teensy by 3 lines(Vcc, GND, Data).

View file

@ -9,6 +9,7 @@
#include "util.h"
#include "debug.h"
#include "adb.h"
#include "usb_keyboard.h"
#include "matrix_skel.h"
@ -71,8 +72,13 @@ uint8_t matrix_scan(void)
uint16_t codes;
uint8_t key0, key1;
_matrix_is_modified = false;
static uint8_t prev_led = 0;
if (prev_led != usb_keyboard_leds) {
adb_host_kbd_led(~usb_keyboard_leds);
prev_led = usb_keyboard_leds;
}
_matrix_is_modified = false;
codes = adb_host_kbd_recv();
key0 = codes>>8;
key1 = codes&0xFF;