kb.h

瑞萨M16C编写的模拟PS2主机与标准键盘通讯程序.完整的工程文件,测试可用.

// Keyboard driver prototypes

#ifndef __KB_H
#define __KB_H

#include "machine.h"

#define kb_init ps2_kb_init
// Definitions of special characters
enum {
  	KB_LAST_REAL_CHAR = 127,											// last "real" (non special) character
	KB_INTERRUPT,																	// interrupt received (CTRL+C)
	KB_BACKSPACE,																	// backspace
	KB_TAB,																				// horizontal tab
	
	KB_PGUP,																			// page up
	KB_FIRST_LARGE_MOVEMENT = KB_PGUP,						// first "large movement" command
	KB_PGDOWN,																		// page down
	KB_HOME,																			// home
	KB_END,																				// end
	KB_LAST_LARGE_MOVEMENT = KB_END,							// last "large movement" command
	
	KB_CLRLINE,																		// clear line (CTRL+Y)
	KB_CMDMODE,																		// switch to command mode (CTRL+Q)
	KB_FIND,																			// find text (CTRL+F)
	KB_NL,																				// newline		
	KB_SAVE,																			// save source (CTRL+S)
	KB_GOTO,																			// go to line (CTRL+G)
		
	KB_LEFT,																			// go left
	KB_FIRST_MOVEMENT = KB_LEFT,									// first basic movement command
	KB_RIGHT,																			// go right
	KB_UP,																				// go up
	KB_DOWN,																			// go down	
	KB_LAST_MOVEMENT = KB_DOWN,										// last basic movement command
	
	KB_UNKNOWN																		// unknown key
};

// Next macro will check if a character is a "real" character or an extended one
#define KB_IS_REAL_CHAR( x ) ( ( x ) <= KB_LAST_REAL_CHAR )
#define KB_IS_SIMPLE_MOVEMENT( x ) ( ( KB_FIRST_MOVEMENT <= ( x ) ) && ( ( x ) <= KB_LAST_MOVEMENT ) )
#define KB_IS_LARGE_MOVEMENT( x ) ( ( KB_FIRST_LARGE_MOVEMENT <= ( x ) ) && ( ( x ) <= KB_LAST_LARGE_MOVEMENT ) )
#define KB_IS_MOVEMENT( x ) ( KB_IS_SIMPLE_MOVEMENT( x ) || KB_IS_LARGE_MOVEMENT( x ) )

// Structure that holds all the functions implemented by the driver
typedef struct _KBDRV_CTX { 
  u8 ( *waitchar )( void );											// wait for a character and return it
  s8 ( *keypressed )( void );										// returns 1 if a key is available, 0 otherwise
  u8 ( *getchar )( void );											// get a character (without timeout)
} KBDRV_CTX;

// Public interface functions
void kb_init( KBDRV_CTX * ); 										// initialize the driver


#endif