我已经实现了最简单的串口间的通信,但是老师要我在此基础上再加上协议进行通信,能收发固定格式,解析数据信息。当时学网络的时候就有点迷糊,现在不知道怎么下手,看到好多例子都是C++的,没有C#的,希望高手能给我一个简单的C#例子看看,谢谢了~~
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using System.Collections.Generic;
using System.Linq;
using System.Text;
using SMSLibrary;
using System.IO.Ports;
using System.Text.RegularExpressions;
using System.IO;
using System.Threading;
using System.Diagnostics;namespace SMSImpl {
public class SMSModem {
public bool IsOpen { get { return isOpen; } }
public SMSModem(string portName) {
this.portName = portName; Regex r1 = new Regex(@"^\+CMTI\:");
Regex r2 = new Regex(@"^\+CMGR\:");
Regex r3 = new Regex(@"^\+RING\:"); ATBeginHandlerMap.Add(r1, OnBeginCMTI);
ATBeginHandlerMap.Add(r2, OnBeginCMGR);
ATBeginHandlerMap.Add(r3, OnBeginRING); ATHandlerMap.Add(r1, OnCMTI);
ATHandlerMap.Add(r2, OnCMGR);
ATHandlerMap.Add(r3, OnRING); responseMap.Add(typeof(SendSMSRequest), OnCMGSResponse);
} public void Open() {
port = new SerialPort(portName);
port.Encoding = Encoding.Default;
port.ReadTimeout = 30000;
port.WriteTimeout = 30000;
port.BaudRate = 9600;
port.RtsEnable = true; port.Open();
port.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived); AddRequestToQueue(new SettingReuqest("AT").Execute(port));
Thread.Sleep(50);
AddRequestToQueue(new SettingReuqest("ATE0").Execute(port));
AddRequestToQueue(new SettingReuqest("AT+CMGF=1").Execute(port));
AddRequestToQueue(new SettingReuqest("AT+CNMI=2,1").Execute(port));
AddRequestToQueue(new SettingReuqest("AT+CSMP=49,167,0,8").Execute(port)); isOpen = true;
} public void Close() {
port.DataReceived -= port_DataReceived;
port.Close();
isOpen = false;
} public void Send(SMS arg) {
if (arg.Text.Length > 70) {
throw new Exception("短信超过70个字符!");
} AddRequestToQueue(new SendSMSRequest(arg).Execute(port));
} // ----------------------------------------------------------------------
private void port_DataReceived(object sender, SerialDataReceivedEventArgs e) {
string line = string.Empty; try {
while (port.BytesToRead > 0) {
line = port.ReadLine();
if (!string.IsNullOrEmpty(line) && "\r" != line) {
Console.WriteLine(line);
receiveBuffer.Add(line); if (!isInterrupt) {
if (IsBeginInterrupt(line)) {
if (IsEndInterrupt()) {
EndInterrupt();
}
} else {
string c = line.TrimEnd('\r');
if ("OK" == c || "ERROR" == c) {
var response = new ModemResponse(receiveBuffer);
response.Request = requestQueue.Dequeue();
Type t = response.Request.GetType();
if (responseMap.ContainsKey(t)) {
responseMap[t](response);
}
receiveBuffer.Clear();
}
}
} else {
if (IsEndInterrupt()) {
EndInterrupt();
}
}
}
}
} catch (Exception ex) {
Trace.WriteLine(ex);
}
} private void EndInterrupt() {
interruptHandler(receiveBuffer); beginInterruptHandler = null;
interruptHandler = null;
receiveBuffer.Clear();
} private bool IsEndInterrupt() {
Trace.Assert(beginInterruptHandler != null);
bool result = false;
if (beginInterruptHandler(receiveBuffer)) {
result = true;
}
return result;
} private bool IsBeginInterrupt(string arg) {
bool result = false; foreach (var each in ATBeginHandlerMap.Keys) {
if (each.IsMatch(arg)) {
beginInterruptHandler = ATBeginHandlerMap[each];
interruptHandler = ATHandlerMap[each];
result = true;
break;
}
} return result;
} private bool OnBeginCMTI(List<string> content) {
return true;
} private void OnCMTI(List<string> content) {
// +CMTI:"SM",1
Regex pattern = new Regex(@"^\+CMTI:.+,(\d+)");
Match m = pattern.Match(content[0]);
index = Convert.ToInt32(m.Groups[1].Value); AddRequestToQueue(new RetrieveSMSReuqest(index).Execute(port));
} private bool OnBeginCMGR(List<string> content) {
return (content.Count == 3);
} private void OnCMGR(List<string> content) {
Regex pattern = new Regex("^\\+CMGR:.+,\"(\\S+)\","); Match m = pattern.Match(content[0]);
string address = m.Groups[1].Value;
if (address.StartsWith("+86")) {
address = address.Substring(3);
}
string content1 = content[1].TrimEnd('\r');
if (content1.StartsWith("050003")) {
content1 = content1.Substring(12);
} SMS sms = new SMS(address, SMSHelper.SMSDecode(content1));
sms.Raw = content[1].TrimEnd('\r');
sms.Flags = 0;
sms.CreatedAt = DateTime.Now; deleteByIndex(index);
Receive(sms);
} private bool OnBeginRING(List<string> content) {
return true;
} private void OnRING(List<string> content) { } private void OnCMGSResponse(ModemResponse response) {
SendResult(response);
} private void deleteByIndex(int index) {
port.Write(string.Format("AT+CMGD={0}\r", index));
} private void AddRequestToQueue(ModemMessage arg) {
if (arg is ModemRequest) {
requestQueue.Enqueue(arg as ModemRequest);
}
} private List<string> receiveBuffer = new List<string>();
private ATReceivedEventHandler interruptHandler;
private ATBeginReceivedEventHandler beginInterruptHandler;
private bool isInterrupt { get { return beginInterruptHandler != null; } } private Queue<ModemRequest> requestQueue = new Queue<ModemRequest>();
private Dictionary<Type, ModemResponseHandler> responseMap = new Dictionary<Type, ModemResponseHandler>();
private Dictionary<Regex, ATBeginReceivedEventHandler> ATBeginHandlerMap = new Dictionary<Regex, ATBeginReceivedEventHandler>();
private Dictionary<Regex, ATReceivedEventHandler> ATHandlerMap = new Dictionary<Regex, ATReceivedEventHandler>();
private string portName;
private SerialPort port;
private int index;
private bool isOpen = false; public event SMSReceivedEventHandler Receive;
public event SMSSendEventHandler SendResult;
} public delegate bool ATBeginReceivedEventHandler(List<string> content);
public delegate void ATReceivedEventHandler(List<string> content);
public delegate void ModemResponseHandler(ModemResponse response);
public delegate void SMSReceivedEventHandler(SMS arg);
public delegate void SMSSendEventHandler(ModemResponse response);}