text3.c

此程序是我用AT89S52单片机来控制显示屏FYD12864,采用C语言编写的可以显示图形,我调试了一周,在此和大家一起分享

#include "main.h"
#include <reg52.h>

#define LCD_Data P0
sbit	LCD_RS		=P1^2;
sbit	LCD_E		=P1^0;
sbit	LCD_WR		=P1^1;

/*
返回值Status:	当前地址计数器的值.
*/

unsigned char LCDBusyWait()							//等待LCD就绪
{
	unsigned char Status;
	LCD_RS=0;
	LCD_WR=1;
	LCD_Data=0xFF;
	LCD_E=1;
	Status=LCD_Data;
	LCD_E=0;
	while(Status & 0x80)
	{
		
		LCD_E=1;
		Status=LCD_Data;
		LCD_E=0;
	}
	LCD_WR=0;
	return Status;
}

void WriteLCD_Data(unsigned char Data)			//向LCD写入一个字节的数据
{
	LCDBusyWait();
	LCD_RS=1;
	LCD_Data=Data;
	LCD_E=1;
	LCD_E=0;
}

void WriteLCD_Command(unsigned char Command)	//向LCD写入一个字节的命令
{
	LCDBusyWait();
	LCD_RS=0;
	LCD_Data=Command;
	LCD_E=1;
	LCD_E=0;
}


void WriteLCD(unsigned char StartAddressY,unsigned char StartAddressX,unsigned char *tab,unsigned char biaozhi)

{  unsigned char a;
   unsigned char b;
  
  
  for(a=0;a<32;a++)
    { 
	  if( biaozhi==0)
	   {      	   
			    	WriteLCD_Command(StartAddressY);
				    StartAddressY+=1;	
			        WriteLCD_Command(StartAddressX);
				   for(b=0;b<16;b++)
				       {
					     WriteLCD_Data(*(tab++));
						 }
		}
	  else
	    {		
		            WriteLCD_Command(StartAddressY);
				    StartAddressY+=1;	
			        WriteLCD_Command(StartAddressX);
				     for(b=0;b<16;b++)
				       {
					     WriteLCD_Data(*(tab++));
					    }
		  			
		
		}



	  }
  }