2
這就是我想要做的。我已經有一些功能,例如這一次將數據寫入到串行端口,它完美的作品:使用C++從Arduino讀取串行數據
bool WriteData(char *buffer, unsigned int nbChar)
{
DWORD bytesSend;
//Try to write the buffer on the Serial port
if(!WriteFile(hSerial, (void *)buffer, nbChar, &bytesSend, 0))
{
return false;
}
else
return true;
}
的閱讀功能是這樣的:
int ReadData(char *buffer, unsigned int nbChar)
{
//Number of bytes we'll have read
DWORD bytesRead;
//Number of bytes we'll really ask to read
unsigned int toRead;
ClearCommError(hSerial, NULL, &status);
//Check if there is something to read
if(status.cbInQue>0)
{
//If there is we check if there is enough data to read the required number
//of characters, if not we'll read only the available characters to prevent
//locking of the application.
if(status.cbInQue>nbChar)
{
toRead = nbChar;
}
else
{
toRead = status.cbInQue;
}
//Try to read the require number of chars, and return the number of read bytes on success
if(ReadFile(hSerial, buffer, toRead, &bytesRead, NULL) && bytesRead != 0)
{
return bytesRead;
}
}
//If nothing has been read, or that an error was detected return -1
return -1;
}
而且不管我做什麼用arduino,這個函數總是返回-1,我甚至嘗試加載一個不斷寫入字符到串口的代碼,但沒有任何結果。
我從這裏得到的功能:http://playground.arduino.cc/Interfacing/CPPWindows
所以我的功能基本上是相同的。我只是將它們複製到我的代碼中,而不是將它們用作類對象,但不止它是相同的。
所以這是我的問題,我可以寫入數據到串口,但我無法讀取,我可以嘗試什麼?
你的線路是什麼樣的,打開串口? GetLastError是什麼?你確定這個設備實際上是給你一些東西來閱讀嗎? – 2013-05-01 12:30:25
@MatsPetersson hSerial =的CreateFile(wText, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); hSerial是一個定義爲HANDLE hSerial的變量。你是這個意思嗎? – MyUserIsThis 2013-05-01 12:32:35
@MatsPetersson我不知道如何隔離問題發生的地方。如果我打開Arduino IDE的串行監視器,我可以看到設備正在發送數據。該程序也可以發送數據。問題在於閱讀它。變量:status.cbInQue是0,它應該是要讀取的字節數。 – MyUserIsThis 2013-05-01 12:34:07