using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.IO.Ports;using System.Threading;

namespace WindowsFormsApplication2{public partial class Form1 : Form    {// SerialPort SpSMS = new SerialPort("COM3", 300, 0, 8, StopBits.One);        SerialPort serialPort1 = new SerialPort();public Form1()        {            InitializeComponent();        }

private  void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)        {

int num; //获取缓冲数据个数            num = serialPort1.BytesToRead;byte[] data = new byte[num];            serialPort1.Read(data, 0, num);  //读数

        }

private void button1_Click(object sender, EventArgs e)        {            serialPort1.PortName = "COM3";  //端口号            serialPort1.BaudRate = 1200;   //比特率            serialPort1.Parity = Parity.None;//奇偶校验            serialPort1.StopBits = StopBits.One;//停止位            serialPort1.ReadTimeout = 1000; //读超时，即在1000内未读到数据就引起超时异常            serialPort1.Open();//端口打开            serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);//过程注册                   }

private void button2_Click(object sender, EventArgs e)        {            serialPort1.Close();//关闭串口          }

    }}

/*  11.0592MHz,  波特率1200  */

#include<reg51.h>#include<stdio.h>//头文件

void main(void)//主程序{   SCON=0x50;//串口方式1，允许接收   TMOD=0x20;//定时器1，定时方式2   TCON=0x40;//设定时器1开始计数   TH1=0xE8;//11.0592MHz, 1200波特率   TL1=0xE8;   TI=1;   TR1=1;

while(1)     {        printf("Hello ni hao!");     }}