cs6-2.c

《手把手教你学单片机的C程序设计》及实验程序

#include <REG51.H>	
/*===================================*/
void delay(unsigned int k)	
{				
unsigned int i,j;		
for(i=0;i<k;i++){		
for(j=0;j<121;j++)		
{;}}					
}					
//===============================
void main(void)		
{					
while(1)				
	{
	P0=0x3f;
	P2=0xfe;		
	delay(1);			
	P0=0x3f;
	P2=0xfd;			
	delay(1);		
	P0=0x3f;
	P2=0xfb;				
	delay(1);			
	P0=0x3f;
	P2=0xf7;			
	delay(1);	
	//*******************	
	P0=0x3f;
	P2=0xef;		
	delay(1);		
	P0=0x3f;			
	P2=0xdf;			
	delay(1);			
	P0=0x3f;			
	P2=0xbf;				
	delay(1);			
	P0=0x3f;			
	P2=0x7f;				
	delay(1);				
	}				
}