如何通过serialport读取GPS 数据！
如何通过serialport读取GPS 数据！
由于需要考虑信号问题，所以希望在1分钟之类进行不断刷新，直到读到数据位置。否则提示无法接受GPS信号
[解决办法]
你是要每一分钟检测一下有没有数据，还是要接收1分钟数据呀
[解决办法]
应该是收到数据就 显示吧.这样才能保证数据不丢失.
[解决办法]
不知道你想要干什么...下面就是个接收事件，有数据来了就收...自己看着改
SerialPort SPCom = new SerialPort("COM1",9600);SPCom.Open(); private void SPCom_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e) { //定义变量 byte[] BufferBytes,ReceivedBuff; int Count; Count = SPCom.BytesToRead; //得到数据 BufferBytes = new Byte[Count]; SPCom.Read(BufferBytes, 0, Count); for (int i = 0; i < Count; i++) { ReceivedBuff[i]= BufferBytes[i]; } }
[解决办法]
1using System;
2using System.IO.Ports;
3using System.Collections;
4using System.Collections.Generic;
5using System.Windows.Forms;
6using System.Runtime.InteropServices;
7
8namespace Lordeo.AssetMan.PPC.App
9{
10 public class GpsMonitor
11 {
12 private SerialPort m_serialPort;
13
14 private System.Windows.Forms.Timer m_timer;
15 private const int defaultTimerInterval = 800; //越快越容易出错
16 //读取到事件
17 public event EventHandler OnDataRecieved;
18 //临时存储读取的信息
19 private string m_dataReaded = string.Empty;
20
21 /**//// <summary>
22 /// 构造
23 /// </summary>
24 public GpsMonitor()
25 {
26 //timer
27 m_timer = new System.Windows.Forms.Timer();
28 m_timer.Interval = defaultTimerInterval;
29 m_timer.Tick += new EventHandler(Timer_Tick);
30
31 //设置端口的默认值
32 m_serialPort = new SerialPort();
33 m_serialPort.ReadBufferSize = 2048;
34 m_serialPort.BaudRate = 4800; //P800默认的速率，过高的速率容易产生误码
35 m_serialPort.DataBits = 8;
36 m_serialPort.Parity = Parity.None;
37 m_serialPort.StopBits = StopBits.One;
38 m_serialPort.ReadTimeout = 2000;//超时
39 m_serialPort.PortName = "COM4"; //多数GPS都用COM4
40
41 m_serialPort.ErrorReceived += new SerialErrorReceivedEventHandler(SerialPort_ErrorReceived);
42 }
43
44 private void SerialPort_ErrorReceived(object sender, SerialErrorReceivedEventArgs e)
45 {
46 this.Message = e.ToString();
47 }
48
49 timer#region timer
50 /**//// <summary>
51 /// 计时器工作
52 /// </summary>
53 /// <param name="sender"> </param>
54 /// <param name="e"> </param>
55 private void Timer_Tick(object sender, EventArgs e)
56 {
57 try
58 {
59 if (!string.IsNullOrEmpty(m_serialPort.ReadLine()))
60 {
61 this.Message = m_serialPort.ReadLine();
62
63
64 }
65 }
66 catch (Exception ex)
67 {
68 if (ex.GetType() == typeof(System.TimeoutException))
69 {
70 //this.StopWatch();
71 this.Message = "操作超时，请确认设备是否已经打开或尝试其他端口。";
72 }
73 }
74 }
75 #endregion
76
77 OpenSerialPort#region OpenSerialPort
78 /**//// <summary>
79 /// 打开端口
80 /// </summary>
81 private void OpenSerialPort()
82 {
83 if (!m_serialPort.IsOpen)
84 {
85 try
86 {
87 m_serialPort.Open();
88 }
89 catch (Exception x)
90 {
91 this.Message = x.Message;
92 this.StopWatch();
93 }
94 }
95 }
96 #endregion
97
98 CloseSerialPort#region CloseSerialPort
99 /**//// <summary>
100 /// 关闭端口
101 /// </summary>
102 private void CloseSerialPort()
103 {
104 m_serialPort.Close();
105 }
106 #endregion
107
108 properties#region properties
109 /**//// <summary>
110 ///设置读取的时间间隔，单位毫秒
111 /// </summary>
112 public int Interval
113 {
114 set
115 {
116 this.m_timer.Interval = value;
117 }
118 }
119
120
121 /**//// <summary>
122 /// 执行读取
123 /// </summary>
124 public void BeginWatch()
125 {
126 OpenSerialPort();
127 m_timer.Enabled = true;
128 }
129 /**//// <summary>
130 /// 停止读取
131 /// </summary>
132 public void StopWatch()
133 {
134 m_timer.Enabled = false;
135 CloseSerialPort();
136 }
137
138 /**//// <summary>
139 /// 读取到的信息
140 /// </summary>
141 public string Message
142 {
143 set
144 {
145 m_dataReaded = value;
146 OnDataRecieved(this, null);
147 }
148 get
149 {
150 return m_dataReaded;
151 }
152 }
153
154 /**//// <summary>
155 /// 设置波特率
156 /// </summary>
157 public int BaudRate
158 {
159 get { return m_serialPort.BaudRate; }
160 set { m_serialPort.BaudRate = value; }
161 }
162
163 /**//// <summary>
164 /// 数据位
165 /// </summary>
166 public int DataBits
167 {
168 get { return m_serialPort.DataBits; }
169 set { m_serialPort.DataBits = value; }
170 }
171 /**//// <summary>
172 /// 校验协议
173 /// </summary>
174 public Parity ParityType
175 {
176 get { return m_serialPort.Parity; }
177 set { m_serialPort.Parity = value; }
178 }
179 /**//// <summary>
180 /// 停止位
181 /// </summary>
182 public StopBits StopBitsType
183 {
184 get { return m_serialPort.StopBits; }
185 set { m_serialPort.StopBits = value; }
186 }
187 /**//// <summary>
188 /// 端口号
189 /// </summary>
190 public string PortName
191 {
192 get { return m_serialPort.PortName; }
193 set { m_serialPort.PortName = value; }
194 }
195 #endregion
196
197 获取可用端口#region 获取可用端口
198 /**//// <summary>
199 /// 获取本机可用端口名称
200 /// </summary>
201 /// <returns> </returns>
202 public string[] GetPortNames()
203 {
204 ArrayList ports = new ArrayList();
205
206 uint hPort = INVALID_FILE_HANDLE;
207
208 string port = string.Empty;
209
210 for (int i = 0; i < 10; i++)
211 {
212 port = "COM" + i.ToString() + ":";
213
214 hPort = CreateFile(port, GENERIC_READ, 0, 0, OPEN_EXISTING, 0, IntPtr.Zero);
215 if (hPort != INVALID_FILE_HANDLE)
216 {
217 ports.Add(port);
218 Console.WriteLine(port);
219 CloseHandle(hPort);
220 }
221 }
222
223 return (string[])ports.ToArray(typeof(string));
224 }
225
226 wince defination#region wince defination
227 private const uint GENERIC_READ = 0x80000000;
228 private const uint OPEN_EXISTING = 3;
229 private const uint INVALID_FILE_HANDLE = 0xFFFFFFFF;
230
231 [DllImport("coredll.dll")]
232 static extern uint CreateFile(string lpFileName, uint dwDesiredAccess, uint dwShareMode, uint lpSecurityAttributes, uint dwCreationDisposition, uint dwFlagsAndAttributes, IntPtr notUsedPassZero);
233
234 [DllImport("coredll.dll")]
235 static extern int CloseHandle(uint hObject);
236 #endregion
237
238 #endregion
239 }
240}
241