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ADB keyboard LEDs support

tags/v1.9
tmk 13 years ago
parent
40c24dc89a
commit
06db39583f
5 changed files with 60 additions and 13 deletions
Unified View Show Diff Stats
  1. 34
    9
      ADB.txt
  2. 16
    3
      adb.c
  3. 1
    0
      adb.h
  4. 2
    0
      adb/README
  5. 7
    1
      adb/matrix.c

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ADB.txt View File



Resources 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)] Apple IIgs Hardware Reference Second Edition [p80(Chapter6 p121)]
ftp://ftp.apple.asimov.net/pub/apple_II/documentation/Apple%20IIgs%20Hardware%20Reference.pdf ftp://ftp.apple.asimov.net/pub/apple_II/documentation/Apple%20IIgs%20Hardware%20Reference.pdf
ADB Keycode ADB Keycode
http://72.0.193.250/Documentation/macppc/adbkeycodes/ http://72.0.193.250/Documentation/macppc/adbkeycodes/
http://m0115.web.fc2.com/m0115.jpg http://m0115.web.fc2.com/m0115.jpg
[Inside Macintosh volume V, pages 191-192]
ADB Signaling ADB Signaling
http://kbdbabel.sourceforge.net/doc/kbd_signaling_pcxt_ps2_adb.pdf http://kbdbabel.sourceforge.net/doc/kbd_signaling_pcxt_ps2_adb.pdf
ADB Overview & History ADB Overview & History
3: mice 3: mice


Registers: Registers:
0: application(keyobard/mice use to store its data.)
0: application(keyobard uses this to store its data.)
1: application 1: application
2: application
2: application(keyboard uses this for LEDs and state of modifiers)
3: status and command 3: status and command




keep low for 300us to request. 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. 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: Keycodes:
Scancode consists of 7bit keycode and 1bit release flag. Scancode consists of 7bit keycode and 1bit release flag.
the switch has a special scancode 0x7F7F, so you can the switch has a special scancode 0x7F7F, so you can
also read from Data line. It uses 0xFFFF for release scancode. 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 END_OF_ADB

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adb.c View File

{ {
uint16_t data = 0; uint16_t data = 0;
attention(); 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 return 0; // No data to send
if (!read_bit()) // Startbit(1) if (!read_bit()) // Startbit(1)
return -2; return -2;
return data; 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() static inline void data_lo()
{ {

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adb.h View File

void adb_host_init(void); void adb_host_init(void);
bool adb_host_psw(void); bool adb_host_psw(void);
uint16_t adb_host_kbd_recv(void); uint16_t adb_host_kbd_recv(void);
void adb_host_kbd_led(uint8_t led);


#endif #endif

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adb/README View File

ADB to USB keyboard converter ADB to USB keyboard converter
============================= =============================
http://geekhack.org/showwiki.php?title=Island:14290


This firmware converts ADB keyboard protocol to USB. This firmware converts ADB keyboard protocol to USB.



Build Build
----- -----
0. Connect ADB keyboard to Teensy by 3 lines(Vcc, GND, Data). 0. Connect ADB keyboard to Teensy by 3 lines(Vcc, GND, Data).

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adb/matrix.c View File

#include "util.h" #include "util.h"
#include "debug.h" #include "debug.h"
#include "adb.h" #include "adb.h"
#include "usb_keyboard.h"
#include "matrix_skel.h" #include "matrix_skel.h"




uint16_t codes; uint16_t codes;
uint8_t key0, key1; 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(); codes = adb_host_kbd_recv();
key0 = codes>>8; key0 = codes>>8;
key1 = codes&0xFF; key1 = codes&0xFF;

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