/// <summary>
/// 关闭COM口
/// </summary>
/// <returns></returns>
public void Close()
{
if (sp != null)
{
if (sp.IsOpen)
{
try
{
sp.Close();
}
catch
{
}
}
}
Status = AppStatus.停止;
}
/// <summary>
/// websocket服务，因为一开始就需要打开，在一开始打开
/// </summary>
#region 打开、关闭COM口
/// <summary>
/// 打开COM口
/// </summary>
/// <param name="portName">COM口名称</param>
/// <param name="baudRate">波特率</param>
/// <param name="dataBits">数据位</param>
/// <param name="parity">奇偶校验位</param>
/// <param name="stopBits">停止位</param>
/// <returns></returns>
public void Start()
{
Task.Run(async() => { await mqttclient.ConnectMqttServerAsync(); });
if (!sp.IsOpen)
{
try
{
sp.PortName = Setting.PortName;
sp.BaudRate = Setting.BaudRate;
sp.DataBits = Setting.DataBits;
sp.Parity = Setting.Parity;
sp.StopBits = Setting.StopBits;
sp.DtrEnable = true; //启用控制终端就续信号
sp.RtsEnable = true; //启用请求发送信号
sp.ReadTimeout = 1000;
sp.WriteTimeout = 1000;
sp.Open();
Status = AppStatus.监听;
//发送数据请求
byte[] crcBytes = new byte[2];
byte[] sendResponse = new byte[6 + crcBytes.Length];
sendResponse[0] = 0x01;
sendResponse[1] = 0x03;
sendResponse[2] = 0x00;
sendResponse[3] = 0x00;
sendResponse[4] = 0x00;
sendResponse[5] = 0x07;
GetCRC(sendResponse, ref crcBytes);
sendResponse[sendResponse.Length - 1] = crcBytes[1]; //高8位
sendResponse[sendResponse.Length - 2] = crcBytes[0]; //低8位
sp.Write(sendResponse, 0, sendResponse.Length);
sp.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived);
}
catch (Exception e)
{
Status = AppStatus.停止;
Console.Write(e.ToString());
}
}
}