105 lines
3.6 KiB
C#
105 lines
3.6 KiB
C#
using Common.Attributes;
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using System;
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using System.IO.Ports;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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namespace DeviceCommand.Flexible
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{
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[ACPCommand]
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public static class FSerialPort
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{
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private static readonly SemaphoreSlim _commLock = new(1, 1);
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private static SerialPort CreatePort(string portName, int baudRate, Parity parity, int dataBits, StopBits stopBits, int sendTimeout,int receiveTimeout)
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{
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return new SerialPort(portName, baudRate, parity, dataBits, stopBits)
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{
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Encoding = Encoding.UTF8,
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WriteTimeout = sendTimeout > 0 ? sendTimeout : SerialPort.InfiniteTimeout,
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ReadTimeout = receiveTimeout > 0 ? receiveTimeout : SerialPort.InfiniteTimeout
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};
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}
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#region 最常用：只发送字符串
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public static async Task SendAsync(string portName,int baudRate,Parity parity,int dataBits,StopBits stopBits,int sendTimeout,int receiveTimeout,string command,CancellationToken ct = default)
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{
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await _commLock.WaitAsync(ct);
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try
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{
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using var port = CreatePort(
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portName, baudRate, parity, dataBits, stopBits, sendTimeout, receiveTimeout);
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port.Open();
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using var cts = CancellationTokenSource.CreateLinkedTokenSource(ct);
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if (sendTimeout > 0)
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cts.CancelAfter(sendTimeout);
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var bytes = port.Encoding.GetBytes(command);
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await port.BaseStream.WriteAsync(bytes, 0, bytes.Length, cts.Token);
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await port.BaseStream.FlushAsync(cts.Token);
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}
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finally
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{
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_commLock.Release();
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}
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}
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#endregion
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#region 最常用：发送字符串并读取字符串
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public static async Task<string> SendReadAsync(string portName,int baudRate, Parity parity, int dataBits, StopBits stopBits,int sendTimeout, int receiveTimeout,string command,string delimiter = "\n", CancellationToken ct = default)
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{
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await _commLock.WaitAsync(ct);
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try
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{
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using var port = CreatePort(
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portName, baudRate, parity, dataBits, stopBits, sendTimeout, receiveTimeout);
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port.Open();
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// Send
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var sendBytes = port.Encoding.GetBytes(command);
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await port.BaseStream.WriteAsync(sendBytes, 0, sendBytes.Length, ct);
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await port.BaseStream.FlushAsync(ct);
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// Read
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delimiter ??= "\n";
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var sb = new StringBuilder();
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byte[] buffer = new byte[256];
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using var cts = CancellationTokenSource.CreateLinkedTokenSource(ct);
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if (receiveTimeout > 0)
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cts.CancelAfter(receiveTimeout);
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while (!cts.Token.IsCancellationRequested)
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{
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int read = await port.BaseStream.ReadAsync(
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buffer, 0, buffer.Length, cts.Token);
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if (read == 0)
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break;
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sb.Append(port.Encoding.GetString(buffer, 0, read));
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int index = sb.ToString().IndexOf(delimiter, StringComparison.Ordinal);
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if (index >= 0)
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return sb.ToString(0, index).Trim();
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}
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throw new TimeoutException("串口读取超时");
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}
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finally
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{
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_commLock.Release();
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}
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}
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#endregion
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}
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}
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