51单片机-串行口通信实验

  数码管接口电路原理图

#include<8052.h>
__sfr  __at (0xE8) P4;
__sbit __at (0xEC) P4_4;

#define LSA P1_5
#define LSB P1_6
#define LSC P1_7
#define BUZZ  P4_4 

unsigned char  smg[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
/*LED初始化*/
void LedInit()
{
	LSA = 0;
	LSB = 0;
	LSC = 0;
	P0 = 0xff;
}
/*延迟函数*/
void Delayms(unsigned int xms)
{
	unsigned int i,j;
	for (i = xms;i > 0;i--)
	{
		for (j = 110;j > 0;j--);
	}
} 
/*LED从上向下循环3次*/
void Up2Down(int x){
	int i, j;
	unsigned char sel=0xfe;						
	for(i=0;i>1; 	
		}
		sel=0x7f;						
	}
}
/*LED闪烁*/
void LedShan(int x){
	unsigned int i;
	for (i = 0;i < x;i++){
		P0 = 0xff;
		Delayms(500);
		P0 = 0x00;
		Delayms(500);
	}
	P0 = 0xff;
}

void Buzz()
{
	BUZZ=0;
	Delayms(1000);
	BUZZ=1;
	Delayms(1000);
}

void ConfigUART(unsigned int baud)//UART波特率初始化
{		
	SCON = 0x50;				//串口工作方式1
	TMOD &= 0x0F;
	TMOD |= 0x20;
	TH1 = 256 - (11059200/12/32)/baud;
	TL1 = TH1;
	ET1 = 0;
	ES = 1;
	TR1 =1;
}

void SMG(int x)
{
	LSA=1;
	LSB=0;
	LSC=0;
	P0=smg[x];
}

void InterruptUART(void) __interrupt 4    //串口中断
{		
	unsigned char temp;
	if (RI==1)
	{				//串口接收
		RI = 0;
		temp = SBUF;
		if ((temp == '0')||(temp == '1')||(temp == '2')||(temp == '3')||(temp == '4'))
		{
			TI = 1;
		}
	}
	if (TI==1){     //串口发送
		TI = 0;
		SBUF = temp;
		while(TI == 0);
		LSA = 0;
		LSB = 0;
		LSC = 0;
	    if (temp == '0'){
			P0 = 0xff;
			SMG(0);
		}
		if (temp == '1') {
			Up2Down(3);
			SMG(1);
		}
		if (temp == '2') {
			Down2Up(3);
			SMG(2);
		}
		if (temp == '3') {
			LedShan(3);
			SMG(3);
		}
		if (temp == '4') {
			Buzz();
			SMG(4);
		}
		TI = 0;
	}
}

void main(){
	EA = 1;              //开启总中断
	ConfigUART(9600);	//波特率设为9600
	LedInit();	        //LED初始化
	while(1);
}

#include 
#include 
#include 
#include 
void ConfigUART(unsigned int baud);
void delay(unsigned int xms);
unsigned char code smg[]={0xc0,0xf9,0xa4,0xb0,0x99};
unsigned char temp;
void main()
{
	LSA=LSB=LSC=0;
	EA=1;
	ConfigUART(9600);
	while(1)
	{
		if(temp==0)
		{
			LedScan(0,smg[0]);
		}
		else if(temp==1)
		{
			LedScan(0,smg[1]);
		}
		else if(temp==2)
		{	
			LedScan(0,smg[2]);
		}
		else if(temp==3)
		{	
			LedScan(0,smg[3]);
		}
		else if(temp==4)
		{
			LedScan(0,smg[4]);
		}
	}	
}

void ConfigUART(unsigned int baud)
{
	SCON=0x50;
	TMOD&=0x0F;	
	TMOD|=0x20;	
	TH1=256-(11059200/12/32)/baud;	
	TL1=TH1;
	ET1=0;	
	ES=1;	
	TR1=1;	

void interruptUART(void) interrupt 4
{
	if(RI)
	{
		RI=0;
		temp=SBUF;
		SBUF=temp;
	}
	if(TI)
	{
		TI=0;
	}
}
	
void delay(unsigned int xms)
{
	unsigned char m,n;
	for(m=0;m

STC89C52RC.h
#ifndef _STC89C52RC_H_
#define _STC89C52RC_H_
 sfr	AUXR=0X8E;
 sfr	AUXR1=0XA2;
 sfr	IPH=0xb7;
 sfr	XICON=0XC0;
 sfr	P4=0xE8;
 sbit P44=P4^4;
 sbit	P43=P4^3;
 sbit	P42=P4^2;
 sbit	P41=P4^1;
 sbit	P40=P4^0;
 #endif

led.c
void LedScan(unsigned char pos,unsigned char dispCode)
{
	switch(pos) 
	{
		case 0:
			LSA=1;
			LSB=0;
			LSC=0;break;  
		case 1:
			LSA=0;
			LSB=1;
			LSC=0;break; 
	}
	P0=dispCode;
	delay(1);
	P0=0xff;
	LSA=1;
	LSB=1;
	LSC=1;	
}

led.h
#ifndef __LED_H_
#define __LED_H_
#include
sbit LSA=P1^5;
sbit LSB=P1^6;
sbit LSC=P1^7;
void LedScan(unsigned char pos, unsigned char dispCode);
void delay(unsigned int xms);
#endif