c# - 如何使用通用 Windows 应用程序将串行数据写入 COM 端口？

Question

通常 C# 应用程序像这样使用 System.IO.Ports:

SerialPort port = new SerialPort("COM1"); 
port.Open(); 
port.WriteLine("test");`

但通用 Windows 应用程序不支持 System.IO.Ports 因此无法使用此方法。有谁知道如何通过 UWA 中的 COM 端口写入串行数据？

Answer 1

您可以使用 Windows.Devices.SerialCommunication 来做到这一点和 Windows.Storage.Streams.DataWriter类:

The classes provide functionality to discover such serial device, read and write data, and control serial-specific properties for flow control, such as setting baud rate, signal states.

通过将以下功能添加到 Package.appxmanifest:

<Capabilities>
  <DeviceCapability Name="serialcommunication">
    <Device Id="any">
      <Function Type="name:serialPort" />
    </Device>
  </DeviceCapability>
</Capabilities>

然后运行以下代码:

using Windows.Devices.SerialCommunication;
using Windows.Devices.Enumeration;
using Windows.Storage.Streams;

//...   

string selector = SerialDevice.GetDeviceSelector("COM3"); 
DeviceInformationCollection devices = await DeviceInformation.FindAllAsync(selector);
if(devices.Count > 0)
{
    DeviceInformation deviceInfo = devices[0];
    SerialDevice serialDevice = await SerialDevice.FromIdAsync(deviceInfo.Id);
    serialDevice.BaudRate = 9600;
    serialDevice.DataBits = 8;
    serialDevice.StopBits = SerialStopBitCount.Two;
    serialDevice.Parity = SerialParity.None;

    DataWriter dataWriter = new DataWriter(serialDevice.OutputStream);
    dataWriter.WriteString("your message here");
    await dataWriter.StoreAsync();
    dataWriter.DetachStream();
    dataWriter = null;
}
else
{
    MessageDialog popup = new MessageDialog("Sorry, no device found.");
    await popup.ShowAsync();
}