delay_500ms.h

51单片机控制液晶（12864）工作

//500ms延时程序
//#include<reg51.h>
//#include<intrins.h>
//#define  LOAD_HIGH 0x3c
//#define  LOAD_LOW  0xb0

void delay_500ms()
{ 
unsigned char second_count=10;
 TMOD=0x01;
 TH0=0x3c;
 TL0=0xb0;
 TF0=0;          
 TR0=1;         
 for(;;)
{
 TH0=0x3c;
 TL0=0xb0;
 while(!TF0);
 second_count--;
 if(!second_count)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
 break;            //second_count为计数软中断；
 TF0=0;
} 
}