学习单片机第2天

#include"reg52.h"

unsigned char led[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
void delay_ms(int n)
	{
	unsigned int i=0,j=0;
	for(i=0;i<n;i++)
	for(j=0;j<123;j++);
}

void main(){
	unsigned char i;
	while(1){
		
		for(i=0;i<8;i++){
		
		P0=led[i];
			delay_ms(1000);
		}
	}
}

#include"reg52.h"

sbit beep=P1^5;

void delay_ms(int n)
	{
	unsigned int i=0,j=0;
	for(i=0;i<n;i++)
	for(j=0;j<123;j++);
}

void main(){	
	while(1){
			
			beep=~beep;
			delay_ms(1000);
		
	}
}

#include"reg52.h"

unsigned char smg[4]={0xc0,0xf9,0xa4,0xb0};

void delay_ms(int n)
	{
	unsigned int i=0,j=0;
	for(i=0;i<n;i++)
	for(j=0;j<123;j++);
}

void main(){
	unsigned char i;
	while(1){
		for(i=0;i<4;i++)
		{
			P0=smg[i];
			delay_ms(1000);
		}
					
	}
}