C# Winform串口助手

界面设置

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修改控件name属性
了解SerialPort类
实现串口的初始化，开关

创建虚拟串口

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namespace 串口助手
{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){//在设计页面已经预先添加了COM1 COM2 COM3this.port_cbb.Items.Add("COM4");this.port_cbb.Items.Add("COM5");//给发送框加预设文本this.send_rtb.Text = "我是发送框";//给接收框加预设文本this.recive_rtb.Text = "我是接收框";}private void open_btn_Click(object sender, EventArgs e){try{if (port_cbb.Text != ""){serialPort1.PortName = port_cbb.Text;}serialPort1.Open();if (serialPort1.IsOpen){MessageBox.Show("serialport is open");}}catch (Exception ex){MessageBox.Show(ex.ToString() + serialPort1.PortName.ToString());}}private void send_btn_Click(object sender, EventArgs e){//如果发送的数据不为空，则接收if (this.send_rtb.Text !=""){this.recive_rtb.AppendText(this.send_rtb.Text);}else{MessageBox.Show("请先输入发送数据");}}}
}

详细的Serial参数

string PortName 端口号
int DataBits 数据位
StopBits StopBits 停止位
Parity Parity 校验位
int BaudRate 波特率
bool IsOpen 状态
DtrEnable/RtsEnable

波特率

bit 与byte

bit就是位，也叫比特位，是计算机中最小的单位
byte是字节，也是B
1字节(byte) = 8位(bit)
位只有两种形式0和1，只能表示2种状态，而字节是有8个位组成的。可以表示256个状态。
1byte = 8 bit，1KB = 1024 byte， 1MB = 1024KB，1G = 1024MB，1T = 1024G

波特率：表示每秒传输Bit的位数

校验位

无校验（no parity）
奇校验（odd parity）：如果字符数据位中"1"的数目是偶数，校验位为"1"，如果"1"的数目是奇数，校验位应为"0"。（校验位调整个数）
偶校验（even parity）：如果字符数据位中"1"的数目是偶数，则校验位应为"0"，如果是奇数则为"1"。（校验位调整个数）
mark parity：校验位始终为1
space parity：校验位始终为0

数据位

紧跟在起始位之后，是通信中的真正有效信息。

数据位的位数可以由通信双方共同约定，一般可以是5位、7位或8位，标准ASCII码是0_{127（7位），扩展的ASCII码是0}256（8位）。

传输数据时先传送字符的低位，后传送字符的高位。

停止位

表示单个包的最后一位。典型的值为1，1.5和2位。

由于数据时在传输线上定时的，并且每一个设备有其自己的时钟，很可能在通信中两台设备间出现了小小的不同步。因此停止位不仅仅是表示传输的结束，并且提供计算机校正时钟同步的机会。

适用于停止位的位数越多，不同时钟同步的容忍程度越大，但是数据传输率同时也越慢。

串口操作

开关串口

获取端口号

RegistryKEy keyCom = Registry.LocalMachine.OpenSubKey(@"Harsware\DeviceMap\SerialComm");

初始化配置参数

主要包含：端口号，波特率，数据位，停止位，校验位，编码格式

serialPort.Encoding = Encoding.GetEncoding("Gb2312");

开启关闭操作

通过按钮事件来控制开关

配置参数

namespace 串口助手
{public partial class Form1 : Form{private bool isOpen = false;public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){//初始化串口参数配置//在设计页面已经预先添加了COM1 COM2 COM3this.port_cbb.Items.Add("COM4");this.port_cbb.Items.Add("COM5");this.port_cbb.SelectedIndex = 2;this.baud_cbb.SelectedIndex = 1;this.check_cbb.SelectedIndex = 0;this.databit_cbb.SelectedIndex = 3;this.stopbit_cbb.SelectedIndex = 0;/*//给发送框加预设文本this.send_rtb.Text = "我是发送框";//给接收框加预设文本this.recive_rtb.Text = "我是接收框";*/}private void open_btn_Click(object sender, EventArgs e){try{if (serialPort1.IsOpen == false){serialPort1.PortName = port_cbb.Text;serialPort1.BaudRate = Convert.ToInt32(baud_cbb.Text);serialPort1.DataBits = Convert.ToInt32(databit_cbb.Text);switch(check_cbb.SelectedIndex){case 0:serialPort1.Parity = System.IO.Ports.Parity.None;break;case 1:serialPort1.Parity = System.IO.Ports.Parity.Odd;break;case 2:serialPort1.Parity = System.IO.Ports.Parity.Even;break;case 3:serialPort1.Parity = System.IO.Ports.Parity.None;break;}switch (stopbit_cbb.SelectedIndex){case 0:serialPort1.StopBits = System.IO.Ports.StopBits.One;break;case 1:serialPort1.StopBits = System.IO.Ports.StopBits.OnePointFive;break;case 2:serialPort1.StopBits = System.IO.Ports.StopBits.Two;break;case 3:serialPort1.StopBits = System.IO.Ports.StopBits.One;break;default:serialPort1.StopBits = System.IO.Ports.StopBits.One;break;}serialPort1.Open();isOpen = true;open_btn.Text = "关闭串口";}else{serialPort1.Close();isOpen = false;open_btn.Text = "打开串口";}/*if (port_cbb.Text != ""){serialPort1.PortName = port_cbb.Text;}serialPort1.Open();if (serialPort1.IsOpen){MessageBox.Show("serialport is open");}*/}catch (Exception ex){MessageBox.Show(ex.ToString() + serialPort1.PortName.ToString());}}private void send_btn_Click(object sender, EventArgs e){//如果发送的数据不为空，则接收if (this.send_rtb.Text !=""){this.recive_rtb.AppendText(this.send_rtb.Text);}else{MessageBox.Show("请先输入发送数据");}}}
}

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串口收发

从本地设备列表获取串口

获取端口号：注册列表中获取信息

RegistryKey keyCom = Registry.LocalMachine.OpenSubKey(@"Hardware\DeviceMap\SerialComm");
keyCom.GetValueNames();
keyCom.GetValue(xxx);

或使用**SerialPort.GetPortNames()**方法获取当前计算机的串行端口名的数组。

namespace 串口助手
{public partial class Form1 : Form{private bool isOpen = false;public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){//初始化串口参数配置//在设计页面已经预先添加了COM1 COM2 COM3//this.port_cbb.Items.Add("COM4");//this.port_cbb.Items.Add("COM5");//this.port_cbb.SelectedIndex = 2;//this.baud_cbb.SelectedIndex = 1;//this.check_cbb.SelectedIndex = 0;//this.databit_cbb.SelectedIndex = 3;//this.stopbit_cbb.SelectedIndex = 0;serialLoad();/*//给发送框加预设文本this.send_rtb.Text = "我是发送框";//给接收框加预设文本this.recive_rtb.Text = "我是接收框";*/}private void serialLoad(){//string[] cur_port = SerialPort.GetPortNames();RegistryKey keyCom = Registry.LocalMachine.OpenSubKey(@"Hardware\DeviceMap\SerialComm");string[] sSubKeys = keyCom.GetValueNames();port_cbb.Items.Clear();foreach (var sValue in sSubKeys){string portName =(string) keyCom.GetValue(sValue);port_cbb.Items.Add(portName);}this.port_cbb.SelectedIndex = 0;this.baud_cbb.SelectedIndex = 1;this.check_cbb.SelectedIndex = 0;this.databit_cbb.SelectedIndex = 3;this.stopbit_cbb.SelectedIndex = 0;}private void open_btn_Click(object sender, EventArgs e){try{if (serialPort1.IsOpen == false){serialPort1.PortName = port_cbb.Text;serialPort1.BaudRate = Convert.ToInt32(baud_cbb.Text);serialPort1.DataBits = Convert.ToInt32(databit_cbb.Text);switch(check_cbb.SelectedIndex){case 0:serialPort1.Parity = System.IO.Ports.Parity.None;break;case 1:serialPort1.Parity = System.IO.Ports.Parity.Odd;break;case 2:serialPort1.Parity = System.IO.Ports.Parity.Even;break;case 3:serialPort1.Parity = System.IO.Ports.Parity.None;break;}switch (stopbit_cbb.SelectedIndex){case 0:serialPort1.StopBits = System.IO.Ports.StopBits.One;break;case 1:serialPort1.StopBits = System.IO.Ports.StopBits.OnePointFive;break;case 2:serialPort1.StopBits = System.IO.Ports.StopBits.Two;break;case 3:serialPort1.StopBits = System.IO.Ports.StopBits.One;break;default:serialPort1.StopBits = System.IO.Ports.StopBits.One;break;}serialPort1.Open();isOpen = true;open_btn.Text = "关闭串口";}else{serialPort1.Close();isOpen = false;open_btn.Text = "打开串口";}/*if (port_cbb.Text != ""){serialPort1.PortName = port_cbb.Text;}serialPort1.Open();if (serialPort1.IsOpen){MessageBox.Show("serialport is open");}*/}catch (Exception ex){MessageBox.Show(ex.ToString() + serialPort1.PortName.ToString());}}private void send_btn_Click(object sender, EventArgs e){//如果发送的数据不为空，则接收if (this.send_rtb.Text !=""){this.recive_rtb.AppendText(this.send_rtb.Text);}else{MessageBox.Show("请先输入发送数据");}}}
}

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串口数据的发送

public void Write(byte[] buffer, int offset, int count);
public void Write(strng text);
public void Write(char[] buffer, int offest, int count);
public void WriteLine(string text);

可以在串口控件类中查看到这些方法，并可以尝试使用。

 private void send_btn_Click(object sender, EventArgs e){//判断发送数据是否为空且串口是否打开if (this.send_rtb.Text !="" & serialPort1.IsOpen){//this.recive_rtb.AppendText(this.send_rtb.Text);serialPort1.Write(send_rtb.Text);}else{MessageBox.Show("请先输入发送数据");}}

串口数据的接收

public void Read(byte[] buffer, int offset, int count);
public void Read(char[] buffer, int offset, int count);
public int ReadByte();
public int ReadChar();
public string ReadExisting();
public string ReadLine();
public string ReadTo(string value);
public event SerialDataReceivedEventHandler DataReceived;

private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e){string dataReceive = serialPort1.ReadExisting();receive_rtb.AppendText(dataReceive);}

收发数据

异步线程：更新UI

this.Invoke((EventHandler)delegate{});

执行一个异步线程来处理跨线程的数据。

DataReceived是在辅助线程执行，数据要更新到UI的主线程时，这个操作就跨线程了，可以通过异步线程来执行更新。

串口数据：接受字符处理

将数据接受并缓存到数据缓存区（List 优于byte[]）
字符的编码格式：“GB2312”，“UTF8” 等等…

EncodingInfo[] encodingInfos = Encoding.GetEncodings();

使用GB2312处理接收的数据

ribreceive.AppendText(Encoding.GetEncoding("gb2312").GetString(data).Replace("\0","\\0"));

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代码：

//接收数据private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e){//显示暂停则不接受数据if (isRxShow == false) return;//1、需要读取有效的数据BytesToReadbyte[] dataTemp = new byte[serialPort1.BytesToRead];serialPort1.Read(dataTemp, 0, dataTemp.Length);receiveBuffer.AddRange(dataTemp);//计数器receiveCount += dataTemp.Length;this.Invoke(new EventHandler(delegate{//显示接收到的数据长度receivecount_tssl.Text = receiveCount.ToString();//判断是否选中十六进制if (!receivehex_chb.Checked){//编码格式选择 国标2312string str = Encoding.GetEncoding("gb2312").GetString(dataTemp);//0x00 -> \0结束，不会显示str = str.Replace("\0", "\\0");receive_rtb.AppendText(str);}else{//十六进制是选中的状态receive_rtb.AppendText(Transform.ToHexString(dataTemp, " "));}}));//string dataReceive = serialPort1.ReadExisting();//receive_rtb.AppendText(dataReceive);}private void stop_btn_Click(object sender, EventArgs e){if (isRxShow == true){isRxShow = false;stop_btn.Text = "取消暂停";}else{isRxShow = true;stop_btn.Text = "暂停";}}private void receivehex_chb_CheckedChanged(object sender, EventArgs e){if (receive_rtb.Text == "") return;if (receivehex_chb.Checked){receive_rtb.Text = Transform.ToHexString(receiveBuffer.ToArray(), " ");}else{receive_rtb.Text = Encoding.GetEncoding("gb2312").GetString(receiveBuffer.ToArray()).Replace("\0", "\\0");}}private void clear_btn_Click(object sender, EventArgs e){receiveBuffer.Clear();receivecount_tssl.Text = "";receive_rtb.Text = "";}private void autoclear_chb_CheckedChanged(object sender, EventArgs e){if (autoclear_chb.Checked){timer1.Start();}else{timer1.Stop();}}private void timer1_Tick(object sender, EventArgs e){if (receive_rtb.Text.Length > 4096){receiveBuffer.Clear();receive_rtb.Text = "";receivecount_tssl.Text = "";}}

串口数据：发送字符处理

发送普通字符串
发送十六进制字符串

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namespace 串口助手
{public partial class Form1 : Form{private bool isOpen = false;private bool isRxShow = true;//接收缓存区private List<byte> receiveBuffer = new List<byte>();//发送缓存区private List<byte> sendBuffer = new List<byte>();//接收计数private int receiveCount = 0;//发送计数private int sendCount = 0;public Form1(){InitializeComponent();Control.CheckForIllegalCrossThreadCalls = false;}private void Form1_Load(object sender, EventArgs e){//初始化串口参数配置//在设计页面已经预先添加了COM1 COM2 COM3//this.port_cbb.Items.Add("COM4");//this.port_cbb.Items.Add("COM5");//this.port_cbb.SelectedIndex = 2;//this.baud_cbb.SelectedIndex = 1;//this.check_cbb.SelectedIndex = 0;//this.databit_cbb.SelectedIndex = 3;//this.stopbit_cbb.SelectedIndex = 0;serialLoad();/*//给发送框加预设文本this.send_rtb.Text = "我是发送框";//给接收框加预设文本this.recive_rtb.Text = "我是接收框";*/}private void serialLoad(){//string[] cur_port = SerialPort.GetPortNames();RegistryKey keyCom = Registry.LocalMachine.OpenSubKey(@"Hardware\DeviceMap\SerialComm");string[] sSubKeys = keyCom.GetValueNames();port_cbb.Items.Clear();foreach (var sValue in sSubKeys){string portName =(string) keyCom.GetValue(sValue);port_cbb.Items.Add(portName);}this.port_cbb.SelectedIndex = 0;this.baud_cbb.SelectedIndex = 1;this.check_cbb.SelectedIndex = 0;this.databit_cbb.SelectedIndex = 3;this.stopbit_cbb.SelectedIndex = 0;}private void open_btn_Click(object sender, EventArgs e){try{if (serialPort1.IsOpen == false){serialPort1.PortName = port_cbb.Text;serialPort1.BaudRate = Convert.ToInt32(baud_cbb.Text);serialPort1.DataBits = Convert.ToInt32(databit_cbb.Text);switch(check_cbb.SelectedIndex){case 0:serialPort1.Parity = System.IO.Ports.Parity.None;break;case 1:serialPort1.Parity = System.IO.Ports.Parity.Odd;break;case 2:serialPort1.Parity = System.IO.Ports.Parity.Even;break;case 3:serialPort1.Parity = System.IO.Ports.Parity.None;break;}switch (stopbit_cbb.SelectedIndex){case 0:serialPort1.StopBits = System.IO.Ports.StopBits.One;break;case 1:serialPort1.StopBits = System.IO.Ports.StopBits.OnePointFive;break;case 2:serialPort1.StopBits = System.IO.Ports.StopBits.Two;break;case 3:serialPort1.StopBits = System.IO.Ports.StopBits.One;break;default:serialPort1.StopBits = System.IO.Ports.StopBits.One;break;}serialPort1.Open();isOpen = true;open_btn.Text = "关闭串口";}else{serialPort1.Close();isOpen = false;open_btn.Text = "打开串口";}/*if (port_cbb.Text != ""){serialPort1.PortName = port_cbb.Text;}serialPort1.Open();if (serialPort1.IsOpen){MessageBox.Show("serialport is open");}*/}catch (Exception ex){MessageBox.Show(ex.ToString() + serialPort1.PortName.ToString());}}private void sendData(){serialPort1.Write(sendBuffer.ToArray(), 0, sendBuffer.Count);sendCount += sendBuffer.Count();sendcount_tssl.Text = sendCount.ToString();}private void send_btn_Click(object sender, EventArgs e){//如果发送的数据不为空，则接收if (this.send_rtb.Text !="" && serialPort1.IsOpen){Console.WriteLine(Transform.ToHexString(sendBuffer.ToArray()));sendData();}else{MessageBox.Show("请先输入发送数据");}}//接收数据private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e){//显示暂停则不接受数据if (isRxShow == false) return;//1、需要读取有效的数据BytesToReadbyte[] dataTemp = new byte[serialPort1.BytesToRead];serialPort1.Read(dataTemp, 0, dataTemp.Length);receiveBuffer.AddRange(dataTemp);//计数器receiveCount += dataTemp.Length;this.Invoke(new EventHandler(delegate{//显示接收到的数据长度receivecount_tssl.Text = receiveCount.ToString();//判断是否选中十六进制if (!receivehex_chb.Checked){//编码格式选择 国标2312string str = Encoding.GetEncoding("gb2312").GetString(dataTemp);//0x00 -> \0结束，不会显示str = str.Replace("\0", "\\0");receive_rtb.AppendText(str);}else{//十六进制是选中的状态receive_rtb.AppendText(Transform.ToHexString(dataTemp, " "));}}));//string dataReceive = serialPort1.ReadExisting();//receive_rtb.AppendText(dataReceive);}private void stop_btn_Click(object sender, EventArgs e){if (isRxShow == true){isRxShow = false;stop_btn.Text = "取消暂停";}else{isRxShow = true;stop_btn.Text = "暂停";}}private void receivehex_chb_CheckedChanged(object sender, EventArgs e){if (receive_rtb.Text == "") return;if (receivehex_chb.Checked){receive_rtb.Text = Transform.ToHexString(receiveBuffer.ToArray(), " ");}else{receive_rtb.Text = Encoding.GetEncoding("gb2312").GetString(receiveBuffer.ToArray()).Replace("\0", "\\0");}}private void clear_btn_Click(object sender, EventArgs e){receiveBuffer.Clear();receivecount_tssl.Text = "";receive_rtb.Text = "";}private void autoclear_chb_CheckedChanged(object sender, EventArgs e){if (autoclear_chb.Checked){timer1.Start();}else{timer1.Stop();}}private void timer1_Tick(object sender, EventArgs e){if (receive_rtb.Text.Length > 4096){receiveBuffer.Clear();receive_rtb.Text = "";receivecount_tssl.Text = "";}}private void send_rtb_Leave(object sender, EventArgs e){if (sendhex_chb.Checked){//判断是否为十六进制字符if (DataEncoding.IsHexString(send_rtb.Text.Replace(" ",""))){sendBuffer.Clear();sendBuffer.AddRange(Transform.ToBytes(send_rtb.Text.Replace(" ", "")));}else{MessageBox.Show("请输入正确的十六进制数据！");send_rtb.Select();}}else{sendBuffer.Clear();sendBuffer.AddRange(Encoding.GetEncoding("gb2312").GetBytes(send_rtb.Text));}}private void send_rtb_TextChanged(object sender, EventArgs e){// 十六进制切换 会出现问题  这问题就是0x00 转换}private void sendhex_chb_CheckedChanged(object sender, EventArgs e){if (send_rtb.Text == "") return;if (sendhex_chb.Checked){send_rtb.Text = Transform.ToHexString(sendBuffer.ToArray(), " ");}else{send_rtb.Text = Encoding.GetEncoding("gb2312").GetString(sendBuffer.ToArray()).Replace("\0", "\\0");}}private void sendclear_btn_Click(object sender, EventArgs e){sendBuffer.Clear();sendcount_tssl.Text = "0";send_rtb.Text = "";sendCount = 0;}}
}

协议解析

数据大小算端

大端模式

指数据的高字节保存在内存的低地址中，而数据的低字节保存在内存的高地址中，这样的存储模式有点儿类似于把数据当作字符串顺序处理：地址
由小向大增加，而数据从高位往低位放；

小端模式

指数据的高字节保存在内存的高地址中，而数据的低字节保存在内存的低地址中，这种存储模式将地址的高低和数据位权有效地结合起来，高地址部分权值高，低地址部分权值低。

数据校验方式：和校验，CRC，LRC等等

CRC 有多版本:今天使用的是CRC16_ccitt_xmode
LRC
和校验
奇偶校验
异或校验

解析数据处理

关键：queue 队列的先进先出逻辑
关键：控制协议，决定了数据解析逻辑，不同数据解析方式不同
案例：帧头(0x7F)+数据长度+数据+CRC
数据样本：7f+04+31323334+DE10

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声明

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实例化队列Queue

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//接收数据
private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{//显示暂停则不接受数据if (isRxShow == false) return;//1、需要读取有效的数据BytesToReadbyte[] dataTemp = new byte[serialPort1.BytesToRead];serialPort1.Read(dataTemp, 0, dataTemp.Length);receiveBuffer.AddRange(dataTemp);//计数器receiveCount += dataTemp.Length;this.Invoke(new EventHandler(delegate{//显示接收到的数据长度receivecount_tssl.Text = receiveCount.ToString();//判断是否选中"启动数据帧接收"if (!startData_chb.Checked){//判断是否选中十六进制if (!receivehex_chb.Checked){//编码格式选择 国标2312string str = Encoding.GetEncoding("gb2312").GetString(dataTemp);//0x00 -> \0结束，不会显示str = str.Replace("\0", "\\0");receive_rtb.AppendText(str);}else{//十六进制是选中的状态receive_rtb.AppendText(Transform.ToHexString(dataTemp, " "));}}else{//解析数据 queueforeach (byte item in dataTemp){//入列bufferQueue.Enqueue(item);}//解析获取帧头if (!isHeadReceive){//遍历队列获取0x7f位置foreach (byte item in bufferQueue.ToArray()){if (item != 0x7f){//移除数据，保证0x7f在头位置//出列bufferQueue.Dequeue();Console.WriteLine("not 0x7f, Dequeue !");}else{//获取到0x7f，停止遍历//get 0x7f from bufferQueueisHeadReceive = true;Console.WriteLine("0x7f is receive !");break;}}}if (isHeadReceive){//判断数据帧长度if (bufferQueue.Count >= 2){Console.WriteLine(DateTime.Now.ToLongTimeString());//输出缓冲区中的数据，数据以十六进制字符串的形式显示。Console.WriteLine($"show the data in bufferQueue{Transform.ToHexString(bufferQueue.ToArray())}");//使用 X2 格式说明符，表示将值转换为至少两位的大写十六进制数。//如果值的位数少于两位，则在前面补零Console.WriteLine($"frame lenth ={String.Format("{0:X2}", bufferQueue.ToArray()[1])}");frameLenth = bufferQueue.ToArray()[1];// 一帧完整的数据长度判断，不代表数据是正确的if (bufferQueue.Count>=1+1+frameLenth+2){byte[] frameBuffer = new byte[1+1+frameLenth+2];//源数组、源数组的起始索引、目标数组、目标数组的起始索引和要复制的元素数量Array.Copy(bufferQueue.ToArray(), 0, frameBuffer, 0, frameBuffer.Length);if (crc_check(frameBuffer)){Console.WriteLine("frame is check ok,pick it");data_txb.Text = Transform.ToHexString(frameBuffer);data1_txb.Text = String.Format("{0:X2}", frameBuffer[2]);data2_txb.Text = String.Format("{0:X2}", frameBuffer[3]);data3_txb.Text = String.Format("{0:X2}", frameBuffer[4]);data4_txb.Text = String.Format("{0:X2}", frameBuffer[5]);}else{// 无效数据Console.WriteLine("bad frame, drop it");}for (int i = 0; i < 1 + 1 + frameLenth + 2; i++){bufferQueue.Dequeue();}isHeadReceive = false;}}}}}));//string dataReceive = serialPort1.ReadExisting();//receive_rtb.AppendText(dataReceive);}private bool crc_check(byte[] frameBuffer)
{//大小端数据bool ret = false;byte[] temp = new byte[frameBuffer.Length-2];Array.Copy(frameBuffer, 0, temp,0, temp.Length);byte[] crcdata = DataCheck.DataCrc16_Ccitt(temp, DataCheck.BigOrLittle.BigEndian);if (crcdata[0] == frameBuffer[frameBuffer.Length -2] &&crcdata[1] == frameBuffer[frameBuffer.Length-1]){ret = true;}return ret;
}