vb编程实现与usb通信
时间: 2023-08-24 14:02:09 浏览: 100
VB编程可以通过使用USB编程库实现与USB设备的通信。以下是一个基础的示例:
首先,需要导入与USB通信相关的库。
```vb
Imports System
Imports System.Management
Imports System.IO.Ports
```
然后,获取连接到计算机上的USB设备列表。
```vb
Dim devices As List(Of ManagementObject) = New List(Of ManagementObject)()
Dim query As String = "SELECT * FROM Win32_PnPEntity WHERE Name LIKE '%(COM%'"
Dim searcher As ManagementObjectSearcher = New ManagementObjectSearcher(query)
For Each device As ManagementObject In searcher.Get()
devices.Add(device)
Next
```
接下来,选择要与之通信的USB设备,并打开相应的串口。
```vb
Dim selectedDevice As ManagementObject = devices(0) ' 假设选择第一个设备
Dim portName As String = selectedDevice.Properties("Name").Value.ToString().Split(" ")[1]
Dim baudRate As Integer = 9600 ' 设置波特率为9600
Dim serialPort As SerialPort = New SerialPort(portName, baudRate)
serialPort.Open()
```
现在,可以发送和接收数据。
```vb
Dim sendBytes As Byte() = { 1, 2, 3 } ' 假设要发送的数据
serialPort.Write(sendBytes, 0, sendBytes.Length)
Dim receiveBytes(255) As Byte ' 假设要接收的数据长度不超过255
Dim bytesRead As Integer = serialPort.Read(receiveBytes, 0, receiveBytes.Length)
Dim receiveData(bytesRead - 1) As Byte
Array.Copy(receiveBytes, 0, receiveData, 0, bytesRead)
```
最后,记得在程序结束时关闭串口。
```vb
serialPort.Close()
```
这就是使用VB编程实现与USB通信的基本步骤。根据具体的需求和USB设备的特性,可能需要添加更多的代码来处理数据的解析和其他操作。