converter/adb_usb/adb_blargg.h

   1 // Basic support for ADB keyboard
   2
   3 #ifndef ADB_BLARGG_H
   4 #define ADB_BLARGG_H
   5
   6 #include <stdint.h>
   7 #include <stdbool.h>
   8
   9 // Sets up ADB bus. Doesn't send anything to keyboard.
  10 void adb_host_init( void );
  11
  12 // Receives key press event from keyboard.
  13 // 0xKKFF: one key changed state
  14 // 0xKKKK: two keys changed state
  15 enum { adb_host_nothing = 0 }; // no keys changed state
  16 enum { adb_host_error = 0xFFFE }; // receive error
  17 uint16_t adb_host_kbd_recv( void );
  18
  19 // Current state of keyboard modifiers and a few other keys
  20 // Returns adb_host_nothing if keyboard didn't respond.
  21 // Returns adb_host_error if error receiving.
  22 uint16_t adb_host_kbd_modifiers( void );
  23
  24 // Sends command and two bytes of data to keyboard
  25 void adb_host_listen( uint8_t cmd, uint8_t data_h, uint8_t data_l );
  26
  27 // Sets keyboard LEDs. Note that bits are inverted here, so 1 means off, 0 means on.
  28 void adb_host_kbd_led( uint8_t led );
  29
  30 // State of power switch (false = pressed), or true if unsupported
  31 bool adb_host_psw( void );
  32
  33
  34 // Legacy support
  35 #define ADB_POWER       0x7F
  36 #define ADB_CAPS        0x39
  37
  38 #endif