C# 简易的串口监视上位机实现

1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Data;
5 using System.Drawing;
6 using System.Linq;
7 using System.Text;
8 using System.Threading.Tasks;
9 using System.Windows.Forms;
10 using System.IO.Ports;
11 using System.Diagnostics;
12
13 namespace Tem_Hum_Monitorring
14 {
15
16 public partial class Form1 : Form
17 {
18 //实例化串口
19 SerialPort s = new SerialPort();
20
21 public Form1()
22 {
23 InitializeComponent();
24 Control.CheckForIllegalCrossThreadCalls = false;
25 button1.Text = "打开串口";
26 int[] item = { 9600,115200}; //遍历
27 foreach (int a in item)
28 {
29 comboBox2.Items.Add(a.ToString());
30 }
31 comboBox2.SelectedItem = comboBox2.Items[1];
32 }
33
34 private void Form1_Load(object sender, EventArgs e)
35 {
36 portInit();
37 }
38
39 /// <summary>
40 /// 串口初始化
41 /// </summary>
42 private void portInit()
43 {
44 string[] ports = SerialPort.GetPortNames();
45 comboBox1.Items.AddRange(ports);
46 comboBox1.SelectedItem = comboBox1.Items[0];
47 }
48
49 #region 开关串口
50 private void button1_Click(object sender, EventArgs e)
51 {
52 try
53 {
54 if (!s.IsOpen)
55 {
56 s.PortName = comboBox1.SelectedItem.ToString();
57 s.BaudRate = Convert.ToInt32(comboBox2.SelectedItem.ToString());
58 s.Open();
59 s.DataReceived += s_DataReceived; //"+="代表指定响应事件时要调用的方法
60 button1.Text = "关闭串口";
61 }
62 else
63 {
64 s.Close();
65 s.DataReceived -= s_DataReceived;
66 button1.Text = "打开串口";
67 }
68 }
69 catch(Exception ee)
70 {
71 MessageBox.Show(ee.ToString());
72 }
73 }
74 #endregion
75
76 #region 串口接收
77 void s_DataReceived(object sender, SerialDataReceivedEventArgs e)
78 {
79 int count = s.BytesToRead;
80 string str = null;
81 if (count == 8)
82 {
83 //数据解析
84 byte[] buff = new byte[count];
85 s.Read(buff, 0, count);
86 foreach (byte item in buff)
87 {
88 str += item.ToString("X2") + " ";
89 }
90 richTextBox1.Text = "[" + System.DateTime.Now.ToString() + "] " + str + "\n" + richTextBox1.Text;
91 if (buff[0] == 0x04)
92 {
93 ID.Text = buff[0].ToString();
94 switch (buff[2])
95 {
96 case 0x01:
97 {
98 Tem.Text = (buff[5] * 4 + buff[4] * 0.05 - 30).ToString();
99 Hum.Text = (buff[6] + buff[7]).ToString();
100 break;
101 }
102 case 0x02:
103 {
104 Light.Text = (buff[6] + buff[7]).ToString();
105 break;
106 }
107 case 0x04:
108 {
109 Dust.Text = (buff[6] + buff[7]).ToString();
110 break;
111 }
112 default:
113 break;
114 }
115 }
116 }
117 else
118 {
119 //当接收数据不在设定的数据位范围之内时，会出现接受到的数据一直保存在接收缓存区之内，后续每次接手数据都会将上一次的数据进行叠加，造成只能通过关闭串口的方法来清除缓冲区的数据
120 s.DiscardInBuffer(); //丢弃来自串行驱动程序的接收缓冲区的数据
121 }
122 }
123 #endregion
124
125 #region 串口发送
126 private void button3_Click(object sender, EventArgs e)
127 {
128 string[] sendbuff = richTextBox2.Text.Split();
129 Debug.WriteLine("发送字节数：" + sendbuff.Length);
130 foreach (string item in sendbuff)
131 {
132 int count = 1;
133 byte[] buff = new byte[count];
134 buff[0] = byte.Parse(item, System.Globalization.NumberStyles.HexNumber);
135 s.Write(buff,0,count);
136 }
137 }
138 #endregion
139
140 private void button2_Click(object sender, EventArgs e)
141 {
142 int count = 1;
143 byte[] buff = new byte[count];
144 buff[0] = byte.Parse("04", System.Globalization.NumberStyles.HexNumber);
145 s.Write(buff, 0, count);
146 }
147 }
148 }