Introduce CPP macros for AVR IN/OUT registers

firmware/keyboard.h

@@ -1,13 +1,11 @@
 #ifndef __KEYBOARD_H__
 #define __KEYBOARD_H__
 
-#define KEYBOARD_DIR DDRB
-#define KEYBOARD_PIN PINB
-#define KEYBOARD_PORT PORTB
-#define KEY_INC_HOUR (1<<PB0)
-#define KEY_INC_MINUTE (1<<PB1)
-#define KEY_INC_SECOND (1<<PB2)
-#define KEY_INC_BRIGHTNESS (1<<PB3)
+#define KEYBOARD_PORT B
+#define KEY_INC_HOUR 0
+#define KEY_INC_MINUTE 1
+#define KEY_INC_SECOND 2
+#define KEY_INC_BRIGHTNESS 3
 
 void kbd_init(void);
 void kbd_handle_event(void);