st7920.h

一个测试LCD的应用程序

// -------------------------- Header file for st7920.c -------------------------

#ifndef __ST7920__
#define __ST7920__

// --------------------------- Interface Definition ----------------------------
#define LCD_RS	       	P3_0
#define LCD_RW	       	P3_1
#define LCD_E	       	P3_2
#define LCD_DataPort	P1

#define LCD_GMODE		0x36	// 8-bit interface, Extended instruction
#define LCD_CMODE		0x30	// 8-bit interface, Extended instruction
// -----------------------------------------------------------------------------

// ---------------------- Constant Definition ----------------------------------
#define iDat	1
#define iCmd	0

#define LCD_CLS		0x01		// Clear LCD screen
#define LCD_HOME	0x02		// LCD Return home
#define LCD_ENTRY 	0x06		// Set LCD Entry Mode
#define LCD_C2L		0x10		// Move Cursor to the left
#define LCD_C2R		0x14		// Move Cursor to the right
#define LCD_D2L		0x18		// Move display to the left
#define LCD_D2R		0x1C		// Move display to the right

#define LCD_ON		0x0C		// Turn on LCD and Cursor
#define LCD_OFF		0x08		// Turn off LCD

#define LCD_CGRAM_ADDR	0x40	// Start address of LCD CGRAM
#define LCD_CGMAX 	64			// Max CGRAM bytes

#define LCD_CMAX 	144			// Total Columns
#define LCD_XMAX 	(LCD_CMAX/16)	// Total xUnits
#define LCD_YMAX 	32			// Total vBits

#define LCD_COL 	(LCD_CMAX/8)
#define LCD_ROW 	(LCD_YMAX/16)
#define LCD_CHAR	LCD_COL*LCD_ROW

#define LCD_L1		0x80
#define LCD_L2		0x90
//#define LCD_L3		0xA0
//#define LCD_L4		0xB0
// -----------------------------------------------------------------------------

// --------------------------- Function Prototypes -----------------------------
// Write Data or Command to LCD
void SendByte(bit DatCmd, uint8 dByte);
// Write a string to LCD
void SendStr(uint8 code *ptString);
// Set the LCD working mode(Gaphic/Character)
void SetMode(uint8 icmode);
// Set Icon ON/OFF
void SetIcon(uint8 Addr, dByte);
// Move Cursor or display
void Move(uint8 dir);
// Goto specific location
void Gotoxy(uint8 Row, uint8 Col);
// Clear LCD Screen
void Clear(void);
// Wait some time and clear screen
void wait_and_clear(void);
// Tile screen with one data
void Tile(uint8 tData);
// Tile screen with a Chinese Symbol
void cTile(uint16 Hanzi);
// Call built-in Charactors
void CallBuiltinChar(void);
// LCD initialization procedure
void LCD_Initial(void);
// -----------------------------------------------------------------------------
#include "st7920.c"
#endif