C#Can'；t从串行端口Arduino读取完全缓冲区

我已将Arduino连接到串行端口。Arduino具有以下发送字节的简单代码：

void setup()
{
    Serial.begin(9600);
}

void loop()
{
    Serial.write((char)100);
}

接收字节的代码（在单独的线程中）：

int buffersize=100000；
字节[]缓冲区=新字节[buffersize]；
SerialPort端口=新的SerialPort（“COM3”，9600）；
port.ReadBufferSize=缓冲区大小；
port.Open（）；
int字节读取=0；
做
{
bytesread=port.BytesToRead；
}
while（bytesread

我了解到BytesToRead可以返回超过ReadBufferSize的值，因为它包含一个以上的缓冲区。但我只能收到近12000个，在这之后，ReadBufferSize不会改变。所有波特率都会出现同样的问题

那么，如何一次读取缓冲区中的所有100000字节呢？可能有一些驱动程序设置等？

---

请提供帮助。

如果Arduino以该波特率连续发送字节，则速度最大为9600/10=960字节/秒（1字节将占用10波特：8个数据位+1个开始+1个停止）。然后，将在104秒内收集100000字节。如果通信没有中断，代码应该可以工作。要调试它，可以在while循环中添加以下内容：

System.Threading.Thread.Sleep(1000); //sleep 1 second
Console.WriteLine("Total accumulated = " + bytesread);

但是，更好的方法是使用

SerialPort

的

DataReceived

事件：

int buffersize = 100000;
SerialPort port = new SerialPort("COM3", 9600);

port.DataReceived += port_DataReceived;

// To be safe, set the buffer size as double the size you want to read once
// This is for the case when the system is busy and delays the event processing
port.ReadBufferSize = 2 * buffersize;

// DataReceived event will be fired when in the receive buffer
// are at least ReceivedBytesThreshold bytes
port.ReceivedBytesThreshold = buffersize; 
port.Open();

事件处理程序：

private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
    // The event will also be fired for EofChar (byte 0x1A), ignore it
    if (e.EventType == SerialData.Eof)
        return;

    // Read the BytesToRead value, 
    // don't assume it's exactly ReceivedBytesThreshold
    byte[] buffer = new byte[port.BytesToRead];
    port.Read(buffer, 0, buffer.Length);

    // ... Process the buffer ...
}

---

您应该读取缓冲区中可用的内容，并将其粘贴到其他地方进行处理。这本书又读了一遍，以此类推。

private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
    // The event will also be fired for EofChar (byte 0x1A), ignore it
    if (e.EventType == SerialData.Eof)
        return;

    // Read the BytesToRead value, 
    // don't assume it's exactly ReceivedBytesThreshold
    byte[] buffer = new byte[port.BytesToRead];
    port.Read(buffer, 0, buffer.Length);

    // ... Process the buffer ...
}