test.c

1602最简代码显示

#include <5408ad.h>
#define DataPort P2
#define Busy     0x80
sbit RSPIN=P3^4;
sbit RWPIN=P3^5;
sbit LCDEN=P3^7;
void DelayMs(unsigned int number);
void WaitForEnable(void);
void Lcdclsp(void);
void WriteCommand(unsigned char c);
void WriteData(unsigned char c);
void ShowChar(unsigned char pos,unsigned char c);
void ShowString(unsigned char line,char *prt);
void InitLcd();
main(void)
{	char code str1[]="U=216.8V  T=290K";
   char code str2[]="Happy new year!!";
//	unsigned char i,j;
// 	SP=0x50;
 	DelayMs(2000);
 	InitLcd();
//	DelayMs(2000);
//	WriteCommand(0xC0);
//	WriteData(0x41);
	
	ShowString(0,str1);
    ShowString(1,str2);
	   
	  
	//for(i=0;i<17;i++)
//	   { 
//	   ShowString(0,str1+i);
   //    ShowString(1,str2+i);
  //       for(j=0;j<=2000;j++)
//	         DelayMs(10);
//	   }
     while(1)
	        {}	
}
void DelayMs(unsigned int number) 
{
	unsigned char temp;
 	for(;number!=0;number--) {
		for(temp=112;temp!=0;temp--) {
 		 }
 	}
}
 void InitLcd()
{	DelayMs(10);
  	WriteCommand(0x38);
	DelayMs(10);
 	WriteCommand(0x38);
	DelayMs(10);
  	WriteCommand(0x08);
 	WriteCommand(0x01);
  	WriteCommand(0x06);
  	WriteCommand(0x0E); 
  }
void WriteCommand(unsigned char c)
{	
	WaitForEnable();
	RSPIN=0;
	RWPIN=0;
	LCDEN=1;
 	DataPort=c;
    LCDEN=0;
 }
void WriteData(unsigned char c)
{	
    WaitForEnable();
	RSPIN=1;
	RWPIN=0;
	LCDEN=1;    
 	DataPort=c;
	LCDEN=0;
 }																	   
void ShowChar(unsigned char pos,unsigned char c)
{	unsigned char p;
 	if (pos<0x10)													  			              
 	   p=pos+0x80;
 	else  
	   p=pos+0xB0;
 	WriteCommand(p);
 	WriteData(c);
 }
void ShowString(unsigned char line,char *prt)
{	unsigned char L,i;
	L=line*0x10;
 	for(i=0;i<16;i++)
   	ShowChar(L++,*(prt+i));						 			
   }
void WaitForEnable(void)
{   DataPort = 0xff;
	RWPIN=1;
	RSPIN=0;
	LCDEN=1;
	while(DataPort & Busy );
	LCDEN=0;
}