diff options
| -rw-r--r-- | protocol/adb.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/protocol/adb.c b/protocol/adb.c index a92e81f1f6..2f3f667b79 100644 --- a/protocol/adb.c +++ b/protocol/adb.c @@ -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; } @@ -255,7 +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); @@ -282,6 +288,9 @@ Resources --------- ADB - The Untold Story: Space Aliens Ate My Mouse http://developer.apple.com/legacy/mac/library/#technotes/hw/hw_01.html +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 |