SunlightCentralizedControlManagement/UserClass/AsyncSerialPortClient.cs

using ScottPlot.Plottables;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using TouchSocket.Core;
using TouchSocket.SerialPorts;
using TouchSocket.Sockets;

namespace SunlightCentralizedControlManagement_SCCM_.UserClass
{
    public class AsyncSerialPortClient
    {
        public static async Task PortClient(SerialPortClient portclient, string com, int BAUD)
        {
            //var client = new SerialPortClient();
            portclient.Connecting = (client, e) => { return EasyTask.CompletedTask; };//即将连接到端口
            portclient.Connected = (client, e) => { return EasyTask.CompletedTask; };//成功连接到端口
            portclient.Closing = (client, e) => { return EasyTask.CompletedTask; };//即将从端口断开连接。此处仅主动断开才有效。
            portclient.Closed = (client, e) => { return EasyTask.CompletedTask; };//从端口断开连接，当连接不成功时不会触发。
            portclient.Received = (client, e) =>
            {
                _responseEvent.Set();
                string DAT = e.ByteBlock.Span.ToString(Encoding.UTF8);
                //string DAT1 = CRCcheck16.ToCRC16(e.ByteBlock.Span.ToString(Encoding.UTF8));

                return EasyTask.CompletedTask; ;
            };

            await portclient.SetupAsync(new TouchSocketConfig()
                 .SetSerialPortOption(new SerialPortOption()
                 {
                     BaudRate = BAUD,//波特率
                     DataBits = 8,//数据位
                     Parity = System.IO.Ports.Parity.None,//校验位
                     PortName = com,//COM
                     StopBits = System.IO.Ports.StopBits.One,//停止位
                 })
                 .SetSerialDataHandlingAdapter(() => new PeriodPackageAdapter() { CacheTimeout = TimeSpan.FromMilliseconds(100) })
                 .ConfigurePlugins(a =>
                 {
                     //a.Add<MyPlugin>();
                 }));

            await portclient.ConnectAsync();
        }


        private static readonly ManualResetEventSlim _responseEvent = new ManualResetEventSlim(false);
        private static byte[] _receivedData;
        private static readonly object _sendLock = new object(); // 确保发送-等待过程原子性
        /// <summary>
        /// 发送指令并等待响应，超时时间为500ms
        /// </summary>
        /// <param name="command">要发送的指令字节数组</param>
        /// <returns>从机的响应数据，超时则为null</returns>
        public static byte[] SendCommandAndWait(SerialPortClient serialPortClients, string command)
        {
           // lock (_sendLock) // 防止并发发送
            {

                _receivedData = null;
                _responseEvent.Reset(); // 重置事件状态

                serialPortClients.Send(command); // 发送指令

                // 等待500毫秒或直到收到响应
                bool signaled = _responseEvent.Wait(TimeSpan.FromMilliseconds(1000));

                if (signaled)
                {
                    return _receivedData; // 返回收到的数据
                }
                else
                {
                    // 超时处理，记录日志或抛出异常
                    //Console.WriteLine("警告: 等待从机响应超时 (500ms)。");
                    return null; // 或者可以抛出 TimeoutException
                }
            }
        }
    }
}