X-Git-Url: https://git.friedersdorff.com/?a=blobdiff_plain;f=protocol%2Fadb.c;h=155d223fe7ed1f0c438a2ef5226d7b4f88c5ea7e;hb=fc78fac72b558dd52650356d2d17ea613a2ec552;hp=d60b8608b1ee9ce222b41f7d821fcdab1f044609;hpb=76033dcd892a115240c5a990e5643cd53acbca87;p=max%2Ftmk_keyboard.git diff --git a/protocol/adb.c b/protocol/adb.c index d60b8608..155d223f 100644 --- a/protocol/adb.c +++ b/protocol/adb.c @@ -38,7 +38,9 @@ POSSIBILITY OF SUCH DAMAGE. #include #include #include +#include #include "adb.h" +#include "debug.h" static inline void data_lo(void); @@ -56,7 +58,7 @@ 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); @@ -66,6 +68,12 @@ void adb_host_init(void) #ifdef ADB_PSW_BIT psw_hi(); #endif + + // Enable keyboard left/right modifier distinction + // Addr:Keyboard(0010), Cmd:Listen(10), Register3(11) + // upper byte: reserved bits 0000, device address 0010 + // lower byte: device handler 00000011 + adb_host_listen(0x2B,0x02,0x03); } #ifdef ADB_PSW_BIT @@ -75,36 +83,62 @@ bool adb_host_psw(void) } #endif +/* + * Don't call this in a row without the delay, otherwise it makes some of poor controllers + * overloaded and misses strokes. Recommended delay is 16ms. + * + * Thanks a lot, blargg! + */ uint16_t adb_host_kbd_recv(void) { uint16_t data = 0; 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 + dprintf("Startbit ERROR\n"); 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(); - if (read_bit()) // Stopbit(0) + uint8_t stop = read_bit(); // Stopbit(0) + sei(); + + if (stop) { + dprintf("Stopbit ERROR\n"); return -3; + } return data; } -// send state of LEDs -void adb_host_kbd_led(uint8_t led) +void adb_host_listen(uint8_t cmd, uint8_t data_h, uint8_t data_l) { attention(); - send_byte(0x2A); // Addr:Keyboard(0010), Cmd:Listen(10), Register2(10) + send_byte(cmd); 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) + send_byte(data_h); + send_byte(data_l); place_bit0(); // Stopbit(0); } +// send state of LEDs +void adb_host_kbd_led(uint8_t led) +{ + // Addr:Keyboard(0010), Cmd:Listen(10), Register2(10) + // send upper byte (not used) + // send lower byte (bit2: ScrollLock, bit1: CapsLock, bit0: + adb_host_listen(0x2A,0,led&0x07); +} + static inline void data_lo() { @@ -179,24 +213,48 @@ static inline bool read_bit(void) { // ADB Bit Cells // - // bit0: ______~~~ - // 65 :35us + // bit cell time: 70-130us + // low part of bit0: 60-70% of bit cell + // low part of bit1: 30-40% of bit cell + // + // 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 // - // 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] + // bit0: + // 70us bit cell: + // ____________~~~~~~ + // 42-49 21-28 // - // After 55us if data line is low/high then bit is 0/1. - // Too simple to rely on? + // 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; } @@ -211,7 +269,7 @@ 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); @@ -238,12 +296,16 @@ 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/ http://m0115.web.fc2.com/m0115.jpg [Inside Macintosh volume V, pages 191-192] + http://www.opensource.apple.com/source/IOHIDFamily/IOHIDFamily-421.18.3/IOHIDFamily/Cosmo_USB2ADB.c ADB Signaling http://kbdbabel.sourceforge.net/doc/kbd_signaling_pcxt_ps2_adb.pdf ADB Overview & History @@ -355,9 +417,9 @@ 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)