从 Arduino 发送长整数值并从 C# 应用程序接收它们? [英] Sending Long integer values from Arduino and receiving them from C# app?
问题描述
由于标题给出了它,我试图从 arduino 发送 Long integer
值并从我的 C# 应用程序接收它.
As title gives it away I am trying to just send Long integer
values from arduino and receiving it from my C# application.
我的 Arduino 代码是
My Arduino code is
void setup()
{
Serial.begin(9600);
}
long n;
byte b[4];
void loop()
{
n=500;
for (int i=0; i<10; i++)
{
n = n+20;
IntegerToBytes(n, b);
for (int i=0; i<4; ++i)
{
Serial.write((int)b[i]);
}
delay(1000);
}
}
void IntegerToBytes(long val, byte b[4])
{
b[3] = (byte )((val >> 24) & 0xff);
b[2] = (byte )((val >> 16) & 0xff);
b[1] = (byte )((val >> 8) & 0xff);
b[0] = (byte )((val) & 0xff);
}
和相关的C#代码是
private void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
{
if (mySerial.IsOpen)
{
int bytes = mySerial.BytesToRead;
byte[] byte_buffer = new byte[4];
mySerial.Read(byte_buffer, 0, 4);
if (bytes == 4)
{
SerialConverted_LONGValue = BitConverter.ToInt32(byte_buffer, 0);
}
}
}
在我调试代码后,它只是将接收到的值写入文本框.我只能看到一个值,如果有机会,它也会改变几次.
After I debug the code it just writes the received value to a textbox. I can see just one value, and if any chance, it changes couple of times, as well.
我的long到byte[]
和byte[]到long
的转换有什么问题?
What is wrong with my long to byte[]
and byte[] to long
conversion?
推荐答案
BitConverter 做了一个直接的映射.它不知道字节序.将赋值顺序从 3, 2, 1, 0 改为 0, 1, 2, 3.
BitConverter does a straight map. It does not know about endianess. Change the order of assignment from 3, 2, 1, 0 to 0, 1, 2, 3.
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