tmk
11 years ago
1 changed files with 14 additions and 5 deletions
+ 14
- 5
protocol/adb.c
View File
| @@ -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 | |||