通过C#实现自动售货机接口

下面分几部分介绍C#实现自动售货机接口的方法，代码写的非常详细，不懂的地方有注释可以参考下。

MachineJP类：

第1部分：串口初始化，串口数据读写

using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using MachineJPDll.Models;
using MachineJPDll.Utils;

namespace MachineJPDll
{
  /// <summary>
  /// 售货机接口(接口)
  /// </summary>
  public partial class MachineJP
  {
    #region 变量
    /// <summary>
    /// 串口资源
    /// </summary>
    private SerialPort m_SerialPort = null;
    /// <summary>
    /// 待发送给串口的命令列表
    /// </summary>
    private List<Cmd> m_CommandList = new List<Cmd>();
    /// <summary>
    /// 等待ACK_RPT或NAK_RPT的PC端向VMC端发送的消息列表
    /// </summary>
    private List<MT> m_WaitResultMTList = new List<MT>();
    /// <summary>
    /// 从串口接收的数据集合(数据已通过验证)
    /// </summary>
    private ReceiveDataCollection m_ReceiveDataCollection = new ReceiveDataCollection();
    #endregion

    #region 构造函数与析构函数
    /// <summary>
    /// 售货机接口(接口)
    /// </summary>
    public MachineJP()
    {

    }

    ~MachineJP()
    {
      if (m_SerialPort != null)
      {
        m_SerialPort.Close();
        m_SerialPort.Dispose();
        m_SerialPort = null;
      }
    }
    #endregion

    #region 读取串口数据
    /// <summary>
    /// 读取串口数据
    /// </summary>
    /// <returns>从串口读取的数据</returns>
    private byte[] ReadPort()
    {
      //读取串口数据
      DateTime dt = DateTime.Now;
      while (m_SerialPort.BytesToRead < 2)
      {
        Thread.Sleep(1);

        if (DateTime.Now.Subtract(dt).TotalMilliseconds > 1500) //超时
        {
          return new byte[0];
        }
      }
      List<byte> recList = new List<byte>();
      byte[] recData = new byte[m_SerialPort.BytesToRead];
      m_SerialPort.Read(recData, 0, recData.Length);
      recList.AddRange(recData);
      int length = recData[1] + 2; //报文数据总长度
      while (recList.Count < length)
      {
        if (m_SerialPort.BytesToRead > 0)
        {
          recData = new byte[m_SerialPort.BytesToRead];
          m_SerialPort.Read(recData, 0, recData.Length);
          recList.AddRange(recData);
        }
        Thread.Sleep(1);
      }

      return recList.ToArray();
    }
    #endregion

    #region 向串口发送数据
    /// <summary>
    /// 向串口发送数据
    /// </summary>
    /// <param name="cmd">待发送的命令</param>
    /// <param name="SN">序列号</param>
    private void WritePort(Cmd cmd, byte SN)
    {
      //发送数据
      List<byte> sendData = cmd.Data;
      sendData[1] = (byte)sendData.Count;
      sendData[2] = SN;
      byte[] checkCode = CommonUtil.CalCheckCode(sendData, sendData.Count);
      sendData.AddRange(checkCode);
      if (cmd.Mt != null)
      {
        m_WaitResultMTList.Add(cmd.Mt);
      }
      m_SerialPort.Write(sendData.ToArray(), 0, sendData.Count);
      LogHelper.Log(LogMsgType.Info, true, sendData.ToArray());
    }
    #endregion

    #region 发送ACK消息
    /// <summary>
    /// 发送ACK消息
    /// </summary>
    /// <param name="SN">序列号</param>
    private void SendACK(byte SN)
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x40, 0x80 };
      WritePort(new Cmd(sendData), SN);
    }
    #endregion

    #region Init 初始化
    /// <summary>
    /// 初始化
    /// </summary>
    /// <param name="com">串口号(例：COM1)</param>
    public void Init(string com)
    {
      if (m_SerialPort == null)
      {
        m_SerialPort = new SerialPort(com, 9600, Parity.None, 8, StopBits.One);
        m_SerialPort.ReadBufferSize = 1024;
        m_SerialPort.WriteBufferSize = 1024;
        m_SerialPort.DataReceived += new SerialDataReceivedEventHandler(serialPort_DataReceived);
      }

      if (!m_SerialPort.IsOpen)
      {
        m_SerialPort.Open();
      }

      GET_SETUP();
      CONTROL_IND(0x13, new byte[] { 0x00 }); //初始化完成标志
      GET_STATUS();

      SetDecimalPlaces(2); //设置小数点位数
    }
    #endregion

    #region Close 关闭连接
    /// <summary>
    /// 关闭连接
    /// </summary>
    public void Close()
    {
      m_SerialPort.Close();
    }
    #endregion

    #region 接收串口数据
    /// <summary>
    /// 接收串口数据
    /// </summary>
    /// <param name="type">消息类型</param>
    /// <param name="subtype">消息子类型</param>
    public byte[] Receive(byte type, byte subtype)
    {
      return m_ReceiveDataCollection.Get(type, subtype);
    }

    /// <summary>
    /// 接收串口数据
    /// </summary>
    /// <param name="type">消息类型</param>
    /// <param name="subtype">消息子类型</param>
    public byte[] WaitReceive(byte type, byte subtype)
    {
      DateTime time = DateTime.Now;
      while (true)
      {
        byte[] receiveData = m_ReceiveDataCollection.Get(type, subtype);
        if (receiveData != null) return receiveData;

        if (DateTime.Now.Subtract(time).TotalMinutes > 3) return null;

        Thread.Sleep(50);
      }
    }

    /// <summary>
    /// 接收串口数据
    /// </summary>
    /// <param name="type">消息类型</param>
    public byte[] WaitReceive(byte type)
    {
      DateTime time = DateTime.Now;
      while (true)
      {
        byte[] receiveData = m_ReceiveDataCollection.Get(type);
        if (receiveData != null) return receiveData;

        if (DateTime.Now.Subtract(time).TotalMinutes > 3) return null;

        Thread.Sleep(50);
      }
    }
    #endregion

    #region 判断消息是否发送成功
    /// <summary>
    /// 判断消息是否发送成功
    /// </summary>
    public bool SendSuccess(byte type, byte subtype)
    {
      DateTime time = DateTime.Now;
      while (true)
      {
        if (DateTime.Now.Subtract(time).TotalMinutes > 3)
        {
          return false;
        }
        byte[] ack = m_ReceiveDataCollection.Get(type, subtype);
        byte[] nak = m_ReceiveDataCollection.Get(type, subtype);
        if (ack != null) return true;
        if (nak != null) return false;

        Thread.Sleep(1);
      }
    }
    #endregion

  }
}

第2部分：接收串口数据，并响应货机，向货机发送数据 

using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Linq;
using System.Text;
using MachineJPDll.Models;
using MachineJPDll.Utils;

/*
 * VMC->PC数据的接收,货机事件的分发
 */

namespace MachineJPDll
{
  partial class MachineJP
  {
    #region serialPort_DataReceived
    /// <summary>
    /// 数据接收事件的方法
    /// </summary>
    public void serialPort_DataReceived(object obj, SerialDataReceivedEventArgs args)
    {
      byte[] receiveData = ReadPort();

      if (CommonUtil.ValidReceiveData(receiveData)) //只处理验证正确的数据，不正确的数据抛弃不处理
      {
        LogHelper.Log(LogMsgType.Info, false, receiveData);
        byte SN = CommonUtil.GetSN(receiveData);
        MT mt = new MT(receiveData);

        #region 轮询(POLL)
        if (mt.Type == 0x03)
        {
          if (m_CommandList.Count > 0)
          {
            WritePort(m_CommandList[0], SN);
            m_CommandList.RemoveAt(0);
          }
          else
          {
            //发送ACK消息
            SendACK(SN);
          }
        }
        #endregion

        #region 发送ACK消息
        if (CommonUtil.NeedACK(receiveData))
        {
          SendACK(SN); //发送ACK消息
        }
        #endregion

        #region VMC系统参数
        if (mt.Type == 0x05)
        {
          m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
        }
        #endregion

        #region ACK_RPT或NAK_RPT
        if (mt.Type == 0x01 //ACK_RPT
          || mt.Type == 0x02) //NAK_RPT
        {
          if (m_WaitResultMTList.Count > 0)
          {
            m_ReceiveDataCollection.Add(m_WaitResultMTList[0].Type, m_WaitResultMTList[0].Subtype, receiveData);
            m_WaitResultMTList.RemoveAt(0);
          }
        }
        #endregion

        #region INFO_RPT 数据报告
        if (mt.Type == 0x11)
        {
          #region 纸币器信息
          if (mt.Subtype == 16)
          {
            m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
          }
          #endregion

          #region 硬币器信息
          if (mt.Subtype == 17)
          {
            m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
          }
          #endregion

          #region 用户投币余额
          if (mt.Subtype == 3)
          {
            m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
          }
          #endregion
        }
        #endregion

        #region VENDOUT_RPT 出货报告
        if (mt.Type == 0x08)
        {
          m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
        }
        #endregion

        #region STATUS_RPT VMC整机状态报告
        if (mt.Type == 0x0D)
        {
          m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
        }
        #endregion

        #region SALEPRICE_IND 设置当前商品售价
        if (mt.Type == 0x8E)
        {
          m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
        }
        #endregion

        #region PAYIN_RPT VMC发送现金投币报告给PC
        if (mt.Type == 0x06)
        {
          m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
        }
        #endregion

        #region PAYOUT_RPT 出币报告
        if (mt.Type == 0x07)
        {
          m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
        }
        #endregion

        #region COST_RPT VMC扣款报告
        if (mt.Type == 0x10)
        {
          m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
        }
        #endregion

        #region ACTION_RPT 售货机行为报告
        if (mt.Type == 0x0B)
        {
          m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
        }
        #endregion

        #region HUODAO_RPT VMC货道报告
        if (mt.Type == 0x0E)
        {
          m_ReceiveDataCollection.Add(mt.Type, mt.Subtype, receiveData);
        }
        #endregion
      }
      else //接收到的数据没有验证通过
      {
        LogHelper.LogException(LogMsgType.Error, false, "数据异常", receiveData);
      }
    }
    #endregion

  }
}

 第3部分：货机状态、投币、出货等接口

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using MachineJPDll.Enums;
using MachineJPDll.Models;
using MachineJPDll.Utils;

/*
 * PC->VMC数据的发送(并非直接发送,只是添加到发送列表)
 */

namespace MachineJPDll
{
  partial class MachineJP
  {
    #region GET_SETUP
    /// <summary>
    /// PC通知VMC发送VMC_SETUP
    /// </summary>
    public VmcSetup GET_SETUP()
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x40, 0x90 };
      m_CommandList.Add(new Cmd(sendData));

      byte[] receiveData = WaitReceive(0x05);
      if (receiveData != null)
      {
        return new VmcSetup(receiveData);
      }
      return null;
    }
    #endregion

    #region CONTROL_IND PC控制售货机完成对应的动作
    /// <summary>
    /// PC控制VMC
    /// </summary>
    public bool CONTROL_IND(byte subtype, byte[] value)
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x41, 0x85 };
      sendData.Add(subtype);
      if (value != null && value.Length > 0)
      {
        sendData.AddRange(value);
      }
      m_CommandList.Add(new Cmd(sendData, new MT(sendData)));

      return SendSuccess(0x85, subtype);
    }
    #endregion

    #region 设置小数点位数
    /// <summary>
    /// 设置小数点位数
    /// 用于PC 通知VMC，双方的金额数据比例系数关系，PC 每次启动时，都会给
    /// VMC 下发一次type=18 的消息，VMC 需要自己永久保存该数据，直到被PC 再
    /// 次更新。
    /// 取值范围：0、1、2 分别表示以 元、 角 、分 为单位
    /// </summary>
    public bool SetDecimalPlaces(int data)
    {
      return CONTROL_IND(18, new byte[] { (byte)data });
    }
    #endregion

    #region GET_STATUS PC通知VMC发送STATUS_RPT
    /// <summary>
    /// PC通知VMC发送STATUS_RPT
    /// </summary>
    public StatusRpt GET_STATUS()
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x40, 0x86 };
      m_CommandList.Add(new Cmd(sendData));

      byte[] receiveData = WaitReceive(0x0D);
      if (receiveData != null)
      {
        return new StatusRpt(receiveData);
      }
      return null;
    }
    #endregion

    #region GET_INFO PC通知VMC发送INFO_RPT
    /// <summary>
    /// PC通知VMC发送INFO_RPT
    /// </summary>
    public byte[] GET_INFO(byte subtype)
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x40, 0x8C };
      sendData.Add(subtype);
      m_CommandList.Add(new Cmd(sendData));

      return WaitReceive(0x11);
    }
    #endregion

    #region VENDOUT_IND 出货
    /// <summary>
    /// PC出货指示
    /// </summary>
    /// <param name="device">售货机的箱体号 例如柜1 为 0x01 以此类推</param>
    /// <param name="method">method =1：VMC 通过商品ID 指示出货，如果商品ID 不存在，回复NAK_RPT method =2：VMC 通过货道ID 指示VMC 出货，如果货道ID 不存在，回复NAK_RPT</param>
    /// <param name="sp_id_hd_id">sp_id：通过商品ID 指示VMC 出货 hd_id：通过货道ID 指示VMC 出货</param>
    /// <param name="type">如果type=0，cost 代表本次出货扣款金额 如果TYPE 不为0，则COST 必须为0</param>
    /// <param name="cost">cost 代表本次出货扣款金额</param>
    public VendoutRpt VENDOUT_IND(byte device, byte method, byte sp_id_hd_id, byte type, int cost)
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x41, 0x83 };
      sendData.AddRange(new byte[] { device, method, sp_id_hd_id, type });
      sendData.AddRange(CommonUtil.Int2ByteArray(cost, 2));
      m_CommandList.Add(new Cmd(sendData, new MT(sendData)));

      if (SendSuccess(0x83, 0x00))
      {
        byte[] receiveData = WaitReceive(0x08);
        if (receiveData != null)
        {
          return new VendoutRpt(receiveData);
        }
      }
      return null;
    }
    #endregion

    #region HUODAO_SET_IND 设置货道商品数量
    /// <summary>
    /// PC通知VMC，当前货道对应商品的数量等信息
    /// </summary>
    /// <param name="device">表示箱柜号</param>
    /// <param name="huodao">zyxxxxxx “z”固定填0 “y”固定填0 “xxxxxx”，表示商品余量，如果商品余量大于63，则统一为63</param>
    public bool HUODAO_SET_IND(byte device, List<int> huodao)
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x41, 0x8F };
      sendData.Add(device);
      for (int i = 0; i < huodao.Count; i++)
      {
        if (huodao[i] > 63)
        {
          huodao[i] = 63;
        }
      }
      sendData.AddRange(huodao.ConvertAll<byte>(a => (byte)a));
      m_CommandList.Add(new Cmd(sendData, new MT(sendData)));

      return SendSuccess(0x8F, 0x00);
    }
    #endregion

    #region SALEPRICE_IND 设置当前商品售价
    /// <summary>
    /// PC通知VMC，当前商品售价
    /// </summary>
    /// <param name="device">表示箱柜号</param>
    /// <param name="type">表示设置单价的方式；Type = 0：为按商品ID 发送单价，可以变长发送，商品种类最大不超过80 个；Type = 1: 为按货道号发送，固定发送80 个货道的单价信息</param>
    /// <param name="sp_price">商品售价</param>
    public bool SALEPRICE_IND(byte device, byte type, List<int> sp_price)
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x41, 0x8E };
      sendData.Add(device);
      sendData.Add(type);
      sendData.AddRange(sp_price.ConvertAll<byte>(a => (byte)a));
      m_CommandList.Add(new Cmd(sendData, new MT(sendData)));

      return SendSuccess(0x8E, 0x00);
    }
    #endregion

    #region PAYOUT_IND PC指示VMC出币
    /// <summary>
    /// PC指示VMC出币
    /// </summary>
    /// <param name="device">出币设备</param>
    /// <param name="value">本次出币总金额</param>
    /// <param name="type">出币类型 无需理解type 的含义，只需要在出币完成后的PAYOUT_RPT 中将该type 值回传给PC 即可</param>
    public PayoutRpt PAYOUT_IND(PayoutType device, int value, byte type)
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x41, 0x89 };
      sendData.Add((byte)device);
      sendData.AddRange(CommonUtil.Int2ByteArray(value, 2));
      sendData.Add(type);
      m_CommandList.Add(new Cmd(sendData, new MT(sendData)));

      if (SendSuccess(0x89, 0x00))
      {
        byte[] receiveData = WaitReceive(0x07);
        if (receiveData != null)
        {
          return new PayoutRpt(receiveData);
        }
      }
      return null;
    }
    #endregion

    #region COST_IND PC扣款指示
    /// <summary>
    /// PC扣款指示
    /// </summary>
    /// <param name="device">device=0，从用户投币总额中扣款；优先从用户非暂存金额中扣除（纸币尽量滞后压钞），参见《现金扣款顺序》</param>
    /// <param name="value">扣款金额</param>
    /// <param name="type">VMC 不用理解type 的含义，只需上报对应的COST_RPT 时回传即可</param>
    public CostRpt COST_IND(byte device, int value, byte type)
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x41, 0x8B };
      sendData.Add(device);
      sendData.AddRange(CommonUtil.Int2ByteArray(value, 2));
      sendData.Add(type);
      m_CommandList.Add(new Cmd(sendData, new MT(sendData)));

      if (SendSuccess(0x8B, 0x00))
      {
        byte[] receiveData = WaitReceive(0x10);
        if (receiveData != null)
        {
          return new CostRpt(receiveData);
        }
      }
      return null;
    }
    #endregion

    #region GET_HUODAO PC通知VMC上报HUODAO_RPT
    /// <summary>
    /// PC通知VMC上报HUODAO_RPT
    /// </summary>
    /// <param name="device">箱柜号</param>
    public HuoDaoRpt GET_HUODAO(byte device)
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x40, 0x8A };
      sendData.Add(device);
      m_CommandList.Add(new Cmd(sendData));

      byte[] receiveData = WaitReceive(0x0E);
      if (receiveData != null)
      {
        return new HuoDaoRpt(receiveData);
      }
      return null;
    }
    #endregion

    #region SET_HUODAO PC发送配置货道信息
    /// <summary>
    /// PC发送配置货道信息
    /// </summary>
    /// <param name="Cabinet">箱柜号</param>
    /// <param name="hd_no">货道逻辑编号，十进制</param>
    /// <param name="Hd_id">商品ID号</param>
    /// <param name="Hd_count">货道剩余量</param>
    /// <param name="Hd_price">货道单价</param>
    /// <param name="Reserved">保留字段VMC忽略此字段，PC最好将此字段置为0</param>
    public bool SET_HUODAO(byte Cabinet, int hd_no, int Hd_id, int Hd_count, int Hd_price, int Reserved = 0)
    {
      List<byte> sendData = new List<byte>() { 0xE5, 0x00, 0x00, 0x41, 0x93 };
      sendData.Add(Cabinet);
      sendData.Add((byte)hd_no);
      sendData.Add((byte)Hd_id);
      sendData.Add((byte)Hd_count);
      sendData.AddRange(CommonUtil.Int2ByteArray(Hd_price, 2));
      sendData.AddRange(CommonUtil.Int2ByteArray(Reserved, 2));
      m_CommandList.Add(new Cmd(sendData, new MT(sendData)));

      return SendSuccess(0x93, 0x00);
    }
    #endregion

    #region 开启纸硬币器
    /// <summary>
    /// 现金收银模组（纸币器、硬币器）开关
    /// </summary>
    /// <param name="open">true:开,false:关</param>
    public bool CtrlCoinPaper(bool open)
    {
      if (open)
      {
        return CONTROL_IND(2, new byte[] { 1 });
      }
      else
      {
        return CONTROL_IND(2, new byte[] { 0 });
      }
    }
    #endregion

    #region 找零
    /// <summary>
    /// 找零
    /// 与手工拨弄物理找零开关相同
    /// </summary>
    public bool MakeChange()
    {
      return CONTROL_IND(6, new byte[] { 0 });
    }
    #endregion

    #region 获取硬币器信息
    /// <summary>
    /// 获取硬币器信息
    /// </summary>
    public InfoRpt_17 GetCoinInfo()
    {
      return new InfoRpt_17(GET_INFO(17));
    }
    #endregion

    #region 获取纸币器信息
    /// <summary>
    /// 获取纸币器信息
    /// </summary>
    public InfoRpt_16 GetPaperInfo()
    {
      return new InfoRpt_16(GET_INFO(16));
    }
    #endregion

    #region 获取现金投币报告
    /// <summary>
    /// 获取现金投币报告
    /// </summary>
    public PayinRpt GetPayinRpt()
    {
      byte[] receiveData = Receive(0x06, 0x00);
      if (receiveData != null)
      {
        return new PayinRpt(receiveData);
      }
      return null;
    }
    #endregion

    #region 获取用户投币余额
    /// <summary>
    /// 获取用户投币余额
    /// </summary>
    public InfoRpt_3 GetRemaiderAmount()
    {
      byte[] receiveData = WaitReceive(0x11, 0x003);
      if (receiveData != null)
      {
        return new InfoRpt_3(receiveData);
      }
      return null;
    }
    #endregion

  }
}

ReceiveDataCollection类和ReceiveData类： 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MachineJPDll.Models
{
  /// <summary>
  /// 从串口接收到的数据(数据已通过验证)
  /// </summary>
  public class ReceiveData
  {
    /// <summary>
    /// 从串口接收到的数据(数据已通过验证)
    /// </summary>
    public byte[] Data { get; set; }
    /// <summary>
    /// 添加到集合ReceiveDataCollection的时间
    /// </summary>
    public DateTime AddTime { get; set; }
    /// <summary>
    /// 消息类型
    /// </summary>
    public byte Type { get; set; }
    /// <summary>
    /// 消息子类型
    /// </summary>
    public byte Subtype { get; set; }

    /// <summary>
    /// 从串口接收到的数据(数据已通过验证)
    /// </summary>
    /// <param name="type">消息类型</param>
    /// <param name="subtype">消息子类型</param>
    /// <param name="data">从串口接收到的数据(数据已通过验证)</param>
    /// <param name="addTime">添加到集合ReceiveDataCollection的时间</param>
    public ReceiveData(byte type, byte subtype, byte[] data, DateTime addTime)
    {
      this.Type = type;
      this.Subtype = subtype;
      this.Data = data;
      this.AddTime = addTime;
    }
  }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MachineJPDll.Models
{
  /// <summary>
  /// 从串口接收到的数据集合(数据已通过验证)
  /// </summary>
  public class ReceiveDataCollection
  {
    /// <summary>
    /// 从串口接收到的数据集合(数据已通过验证)
    /// </summary>
    private List<ReceiveData> m_ReceiveDataList = new List<ReceiveData>();
    /// <summary>
    /// 数据过期时间
    /// </summary>
    private int m_Timeout = 3;
    private static object _lock = new object();

    /// <summary>
    /// 添加到集合
    /// </summary>
    /// <param name="type">消息类型</param>
    /// <param name="subtype">消息子类型</param>
    /// <param name="data">从串口接收到的数据(数据已通过验证)</param>
    public void Add(byte type, byte subtype, byte[] data)
    {
      lock (_lock)
      {
        ReceiveData receiveData = new ReceiveData(type, subtype, data, DateTime.Now);
        m_ReceiveDataList.Add(receiveData);
        for (int i = m_ReceiveDataList.Count - 1; i >= 0; i--)
        {
          if (DateTime.Now.Subtract(m_ReceiveDataList[i].AddTime).TotalMinutes > m_Timeout)
          {
            m_ReceiveDataList.RemoveAt(i);
          }
        }
      }
    }

    /// <summary>
    /// 从集合中获取串口接收到的数据(数据已通过验证)
    /// </summary>
    /// <param name="type">消息类型</param>
    /// <param name="subtype">消息子类型</param>
    /// <returns>从串口接收到的数据(数据已通过验证)</returns>
    public byte[] Get(byte type, byte subtype)
    {
      lock (_lock)
      {
        ReceiveData receiveData = null;
        for (int i = 0; i < m_ReceiveDataList.Count; i++)
        {
          if (m_ReceiveDataList[i].Type == type && m_ReceiveDataList[i].Subtype == subtype)
          {
            receiveData = m_ReceiveDataList[i];
            m_ReceiveDataList.RemoveAt(i);
            return receiveData.Data;
          }
        }
        return null;
      }
    }

    /// <summary>
    /// 从集合中获取串口接收到的数据(数据已通过验证)
    /// </summary>
    /// <param name="type">消息类型</param>
    /// <returns>从串口接收到的数据(数据已通过验证)</returns>
    public byte[] Get(byte type)
    {
      lock (_lock)
      {
        ReceiveData receiveData = null;
        for (int i = 0; i < m_ReceiveDataList.Count; i++)
        {
          if (m_ReceiveDataList[i].Type == type)
          {
            receiveData = m_ReceiveDataList[i];
            m_ReceiveDataList.RemoveAt(i);
            return receiveData.Data;
          }
        }
        return null;
      }
    }
  }
}

Models：

StatusRpt类：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using MachineJPDll;
using MachineJPDll.Enums;
using MachineJPDll.Utils;

namespace MachineJPDll.Models
{
  /// <summary>
  /// VMC状态报告
  /// </summary>
  public class StatusRpt
  {
    /// <summary>
    /// 从串口读取的通过验证的数据
    /// </summary>
    private byte[] m_data;

    /// <summary>
    /// VMC状态报告
    /// </summary>
    /// <param name="data">从串口读取的通过验证的数据</param>
    public StatusRpt(byte[] data)
    {
      m_data = data;
    }

    public override string ToString()
    {
      StringBuilder sb = new StringBuilder();
      sb.AppendFormat("出货检测设备状态：{0}\r\n", check_st.ToString());
      sb.AppendFormat("纸币器状态：{0}\r\n", bv_st.ToString());
      sb.AppendFormat("硬币器状态：{0}\r\n", cc_st.ToString());
      sb.AppendFormat("VMC状态：{0}\r\n", vmc_st.ToString());
      sb.AppendFormat("展示位状态：{0} {1} {2} {3}\r\n", pos_st[0].ToString(), pos_st[1].ToString(), pos_st[2].ToString(), pos_st[3].ToString());
      sb.AppendFormat("机器中可用的找零量总金额(包括硬币和纸币)：{0}\r\n", change.ToString());
      sb.AppendFormat("货仓1货仓2货仓3货仓4温度：{0} {1} {2} {3}\r\n", tem1.ToString(), tem2.ToString(), tem3.ToString(), tem4.ToString());
      sb.AppendFormat("货仓状态设置值：{0} {1} {2} {3}\r\n", tem_st[0].ToString(), tem_st[1].ToString(), tem_st[2].ToString(), tem_st[3].ToString());
      if (this.自动退币 == 255)
      {
        sb.AppendFormat("自动退币时间：永不自动退币\r\n");
      }
      else
      {
        sb.AppendFormat("自动退币时间：{0}\r\n", 自动退币.ToString());
      }
      sb.AppendFormat("找零余量(1#--6#)：{0} {1} {2} {3} {4} {5}\r\n", this.找零余量1, this.找零余量2, this.找零余量3, this.找零余量4, this.找零余量5, this.找零余量6);

      return sb.ToString();
    }

    /// <summary>
    /// 出货检测设备状态
    /// </summary>
    public CheckSt check_st
    {
      get
      {
        byte val = m_data[5];
        return (CheckSt)CommonUtil.GetFromByte(val, 0, 2);
      }
    }

    /// <summary>
    /// 纸币器状态
    /// </summary>
    public DeviceSt bv_st
    {
      get
      {
        byte val = m_data[5];
        return (DeviceSt)CommonUtil.GetFromByte(val, 2, 2);
      }
    }

    /// <summary>
    /// 硬币器状态
    /// </summary>
    public DeviceSt cc_st
    {
      get
      {
        byte val = m_data[5];
        return (DeviceSt)CommonUtil.GetFromByte(val, 4, 2);
      }
    }

    /// <summary>
    /// VMC状态
    /// </summary>
    public VmcSt vmc_st
    {
      get
      {
        byte val = m_data[5];
        return (VmcSt)CommonUtil.GetFromByte(val, 6, 2);
      }
    }

    /// <summary>
    /// 展示位状态
    /// </summary>
    public List<DeviceSt> pos_st
    {
      get
      {
        List<DeviceSt> deviceStList = new List<DeviceSt>();

        byte val = m_data[6];
        for (int i = 0; i < 4; i++)
        {
          DeviceSt deviceSt = (DeviceSt)CommonUtil.GetFromByte(val, i * 2, 2);
          deviceStList.Add(deviceSt);
        }

        return deviceStList;
      }
    }

    /// <summary>
    /// 机器中，可用的找零量总金额（包括硬币和纸币）
    /// </summary>
    public int change
    {
      get
      {
        return CommonUtil.ByteArray2Int(m_data, 7, 2);
      }
    }

    /// <summary>
    /// 货仓1 温度，8 位有符号数，该温度通过货仓内传感器获取，单位：℃
    /// </summary>
    public TemSub tem1
    {
      get
      {
        return new TemSub(m_data[9]);
      }
    }

    /// <summary>
    /// 货仓2 温度，8 位有符号数，该温度通过货仓内传感器获取，单位：℃
    /// </summary>
    public TemSub tem2
    {
      get
      {
        return new TemSub(m_data[10]);
      }
    }

    /// <summary>
    /// 货仓3 温度，8 位有符号数，该温度通过货仓内传感器获取，单位：℃
    /// </summary>
    public TemSub tem3
    {
      get
      {
        return new TemSub(m_data[11]);
      }
    }

    /// <summary>
    /// 货仓4 温度，8 位有符号数，该温度通过货仓内传感器获取，单位：℃
    /// </summary>
    public TemSub tem4
    {
      get
      {
        return new TemSub(m_data[12]);
      }
    }

    /// <summary>
    /// 货仓状态设置值，共支持4 个货仓
    /// </summary>
    public List<TemSt> tem_st
    {
      get
      {
        List<TemSt> temStList = new List<TemSt>();
        for (int i = 0; i < 4; i++)
        {
          TemSt temSt = (TemSt)CommonUtil.GetFromByte(m_data[13], i * 2, 2);
          temStList.Add(temSt);
        }
        return temStList;
      }
    }

    /// <summary>
    /// 自动退币时间。
    /// 0：表示商品出货后，立即自动退币
    /// 255：表示永不自动退币
    /// 1-254：表示商品出货后，自动退币时间（单位：秒）
    /// </summary>
    public int 自动退币
    {
      get
      {
        return m_data[14];
      }
    }

    /// <summary>
    /// 找零余量“找零量1#”…“找零量6#”，分别对应硬币器信息INFO_RPT.type=17 的“找零
    /// 1#”…“找零6#”中每种钱币的找零数量；
    /// * 找零量最大为255，超过255 时上报为255；
    /// * 找零量单位为“个”，代表可找零硬币的个数。
    /// </summary>
    public int 找零余量1
    {
      get
      {
        return m_data[15];
      }
    }

    /// <summary>
    /// 找零余量“找零量1#”…“找零量6#”，分别对应硬币器信息INFO_RPT.type=17 的“找零
    /// 1#”…“找零6#”中每种钱币的找零数量；
    /// * 找零量最大为255，超过255 时上报为255；
    /// * 找零量单位为“个”，代表可找零硬币的个数。
    /// </summary>
    public int 找零余量2
    {
      get
      {
        return m_data[16];
      }
    }

    /// <summary>
    /// 找零余量“找零量1#”…“找零量6#”，分别对应硬币器信息INFO_RPT.type=17 的“找零
    /// 1#”…“找零6#”中每种钱币的找零数量；
    /// * 找零量最大为255，超过255 时上报为255；
    /// * 找零量单位为“个”，代表可找零硬币的个数。
    /// </summary>
    public int 找零余量3
    {
      get
      {
        return m_data[17];
      }
    }

    /// <summary>
    /// 找零余量“找零量1#”…“找零量6#”，分别对应硬币器信息INFO_RPT.type=17 的“找零
    /// 1#”…“找零6#”中每种钱币的找零数量；
    /// * 找零量最大为255，超过255 时上报为255；
    /// * 找零量单位为“个”，代表可找零硬币的个数。
    /// </summary>
    public int 找零余量4
    {
      get
      {
        return m_data[18];
      }
    }

    /// <summary>
    /// 找零余量“找零量1#”…“找零量6#”，分别对应硬币器信息INFO_RPT.type=17 的“找零
    /// 1#”…“找零6#”中每种钱币的找零数量；
    /// * 找零量最大为255，超过255 时上报为255；
    /// * 找零量单位为“个”，代表可找零硬币的个数。
    /// </summary>
    public int 找零余量5
    {
      get
      {
        return m_data[19];
      }
    }

    /// <summary>
    /// 找零余量“找零量1#”…“找零量6#”，分别对应硬币器信息INFO_RPT.type=17 的“找零
    /// 1#”…“找零6#”中每种钱币的找零数量；
    /// * 找零量最大为255，超过255 时上报为255；
    /// * 找零量单位为“个”，代表可找零硬币的个数。
    /// </summary>
    public int 找零余量6
    {
      get
      {
        return m_data[20];
      }
    }

  }
}

以上就是C#实现自动售货机接口的代码，需要的朋友可以来学习。