6 void usb_init(void); // initialize everything
7 uint8_t usb_configured(void); // is the USB port configured
9 int8_t usb_keyboard_press(uint8_t key, uint8_t modifier);
10 int8_t usb_keyboard_send(void);
11 extern uint8_t keyboard_modifier_keys;
12 extern uint8_t keyboard_keys[6];
13 extern volatile uint8_t keyboard_leds;