di0ib/tmk_keyboard_custom
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Merge branch 'adb_fix'

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tmk 2013-04-09 14:31:27 +09:00
commit e72636b61a
2 changed files with 55 additions and 21 deletions
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75
protocol/adb.c
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@ -57,12 +57,13 @@ static inline void place_bit1(void);
static inline void send_byte(uint8_t data);
static inline bool read_bit(void);
static inline uint8_t read_byte(void);
static inline uint8_t wait_data_lo(uint8_t us);
static inline uint8_t wait_data_lo(uint16_t us);
static inline uint8_t wait_data_hi(uint8_t us);
void adb_host_init(void)
{
DDRF |= (1<<1);
data_hi();
#ifdef ADB_PSW_BIT
psw_hi();
@ -88,19 +89,24 @@ uint16_t adb_host_kbd_recv(void)
attention();
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)
if (!wait_data_lo(500)) { // Tlt/Stop to Start(140-260us)
return 0; // No data to send
if (!read_bit()) // Startbit(1)
}
if (!read_bit()) { // Startbit(1)
// Service Request
return -2;
}
// ad hoc fix: without block inerrupt read wrong bit occasionally and get keys stuck
cli();
data = read_byte();
data = (data<<8) | read_byte();
uint8_t stop = read_bit(); // Stopbit(0)
sei();
if (read_bit()) // Stopbit(0)
if (stop) {
return -3;
}
return data;
}
@ -199,24 +205,48 @@ static inline bool read_bit(void)
{
// ADB Bit Cells
//
// bit0: ______~~~
// 65 :35us
//
// bit1: ___~~~~~~
// 35 :65us
//
// bit0 low time: 60-70% of bit cell(42-91us)
// bit1 low time: 30-40% of bit cell(21-52us)
// bit cell time: 70-130us
// [from Apple IIgs Hardware Reference Second Edition]
// low part of bit0: 60-70% of bit cell
// low part of bit1: 30-40% of bit cell
//
// After 55us if data line is low/high then bit is 0/1.
// Too simple to rely on?
// bit cell time 70us 130us
// --------------------------------------------
// low part of bit0 42-49 78-91
// high part of bit0 21-28 39-52
// low part of bit1 21-28 39-52
// high part of bit1 42-49 78-91
//
//
// bit0:
// 70us bit cell:
// ____________~~~~~~
// 42-49 21-28
//
// 130us bit cell:
// ____________~~~~~~
// 78-91 39-52
//
// bit1:
// 70us bit cell:
// ______~~~~~~~~~~~~
// 21-28 42-49
//
// 130us bit cell:
// ______~~~~~~~~~~~~
// 39-52 78-91
//
// read:
// ________|~~~~~~~~~
// 55us
// Read data line after 55us. If data line is low/high then bit is 0/1.
// This method might not work at <90us bit cell time.
//
// [from Apple IIgs Hardware Reference Second Edition]
bool bit;
wait_data_lo(75); // wait the beginning of bit cell
wait_data_lo(75); // wait the start of bit cell at least 130ms(55+0+75)
_delay_us(55);
bit = data_in();
wait_data_hi(36); // wait high part of bit cell
wait_data_hi(36); // wait high part of bit cell at least 91ms(55+36)
return bit;
}
@ -231,7 +261,7 @@ static inline uint8_t read_byte(void)
return data;
}
static inline uint8_t wait_data_lo(uint8_t us)
static inline uint8_t wait_data_lo(uint16_t us)
{
while (data_in() && us) {
_delay_us(1);
@ -258,7 +288,10 @@ 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)]
ADB Manager
http://developer.apple.com/legacy/mac/library/documentation/mac/pdf/Devices/ADB_Manager.pdf
Service request(5-17)
Apple IIgs Hardware Reference Second Edition [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/
@ -376,9 +409,9 @@ Communication
Global reset:
Host asserts low in 2.8-5.2ms. All devices are forced to reset.
Send request from device(Srq):
Service request from device(Srq):
Device can request to send at commad(Global only?) stop bit.
keep low for 300us to request.
Requesting device keeps low for 140-260us at stop bit of command.
Keyboard Data(Register0)

1
protocol/pjrc/usb.c
View File

@ -31,6 +31,7 @@
#include "usb_mouse.h"
#include "usb_debug.h"
#include "usb_extra.h"
#include "led.h"
#include "print.h"
#include "util.h"
#include "sleep_led.h"