#include <regx52.h>
#include <intrins.h>
#include <string.h>
#define uchar unsigned char       //自定義關(guān)鍵字
#define BUSY_FLAG P0_7       //液晶模塊忙標(biāo)志
#define MPU_RS_CH P2_7       //寄存器選擇輸入   RS
#define MPU_RW_CH P2_6       //讀寫控制     RW
#define MPU_ENABLE P2_5       //使能控制        E
#define MPU_PS_CH P3_6       //串/并傳輸控制    PSB
#define MPU_RESET P3_7       //液晶復(fù)位控制    RST
#define LCD_DATA P0        //液晶數(shù)據(jù)口    P0
#define LOW    0        //低電平
#define HIGH   1        //高電平
#define OFF    0        //邏輯關(guān)
#define ON    1        //邏輯開
//-----------------------------------------------
//液晶模塊指令集定義
#define cClearDisplay 0x01      //清顯示指令
#define cEntryModeSet 0x06      //設(shè)置輸入模式
#define cDisplayOnCtrl 0x0c      //設(shè)置開顯控制
#define cFunctionSetB 0x30      //功能設(shè)定(基本指令)
#define cFunctionSetE 0x34      //功能設(shè)定(擴充指令)
//-----------------------------------------------
void checkLcdBusy (void) 
{
LCD_DATA = 0xff;
MPU_RS_CH = LOW;
MPU_RW_CH = HIGH;
MPU_ENABLE = HIGH;
while (BUSY_FLAG);
MPU_ENABLE = LOW;
}
//===============================================
void delayMs (uchar ms) 
{
uchar i;
while (--ms)
for (i = 0; i < 125; i++);
}
//===============================================
void delaySec (uchar sec) 
{
uchar i;
while (--sec)
for (i = 0; i < 200; i++)
   delayMs (6);
}
//===============================================
void lcdWriteCommand (uchar Command) 
{
checkLcdBusy();
MPU_RS_CH = LOW;
MPU_RW_CH = LOW;
LCD_DATA = Command;
MPU_ENABLE = HIGH;
delayMs(1);
MPU_ENABLE = LOW;
}
//===============================================
void lcdClear (void) 
{
lcdWriteCommand(cClearDisplay);
}
//===============================================
void lcdInit (void)   //初始化LCD子程序
{
MPU_RESET = LOW;
delayMs(40);
MPU_RESET = HIGH;
delayMs(1);
MPU_PS_CH = HIGH;
   lcdWriteCommand(cFunctionSetE);
lcdWriteCommand(cFunctionSetB);
lcdClear();
lcdWriteCommand(cEntryModeSet);
lcdWriteCommand(cDisplayOnCtrl);
}
//===============================================
void lcdWriteData (uchar Data) 
{
checkLcdBusy();
MPU_RS_CH = HIGH;
MPU_RW_CH = LOW;
LCD_DATA = Data;
MPU_ENABLE = HIGH;
delayMs(1);
MPU_ENABLE = LOW;
}
//===============================================
void dispString (uchar X, Y, speed, uchar *msg) 
{
if (X == 0)       X = 0x80;
else if (X == 1) X = 0x90;
else if (X == 2) X = 0x88;
else if (X == 3) X = 0x98;
Y = X + Y;
lcdWriteCommand(Y);
while (*msg)
{
   lcdWriteData(*msg++);
   delayMs(speed);
}
}
//===============================================
void main (void)
{
lcdInit (); lcdClear();
while(1)
{ 
dispString(0, 0, 100, "大學(xué)"); delaySec(1);
dispString(1, 0, 100, "13號"); delaySec(1);
dispString(2, 1, 100, "學(xué)院");      delaySec(1);
dispString(3, 1, 100, "工程"); delaySec(6);
lcdClear();
dispString(0, 1, 100, "單片機開發(fā)");          delaySec(1);
dispString(1, 0, 100, "電子設(shè)備研究開發(fā)"); delaySec(1);
dispString(2, 1, 100, "工業(yè)過程模擬"); delaySec(1);
dispString(3, 0, 100, "結(jié)構(gòu)有限元分析"); delaySec(6); 
lcdClear();
dispString(0, 0, 100, "聯(lián)系人:");    delaySec(1);
dispString(1, 0, 100, "電話:05"); delaySec(1);
dispString(2, 0, 100, "手機:1"); delaySec(1);
dispString(3, 1, 100, "共同學(xué)習(xí)共同進步");      delaySec(6); 
lcdClear();
}
}