Adding files from my site

Provider/RfidCredentialProvider/Serial.cpp

@@ -0,0 +1,150 @@
+#include "Serial.h"
+#include "Registry.h"
+#include <iostream>
+
+Serial::Serial()
+{
+	//We're not yet connected
+	this->connected = false;
+
+	HKEY hKey;
+	if(RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Tyler Menezes\\Rfid Login", 0, KEY_READ, &hKey) != ERROR_SUCCESS){
+		delete hKey;
+		return; // Token not recognized.
+	}
+
+	std::wstring port;
+	GetStringRegKey(hKey, L"Port", port, L"COM3");
+
+	//Try to connect to the given port throuh CreateFile
+	this->hSerial = CreateFile(port.c_str(),
+			GENERIC_READ | GENERIC_WRITE,
+			0,
+			NULL,
+			OPEN_EXISTING,
+			FILE_ATTRIBUTE_NORMAL,
+			NULL);
+
+	//Check if the connection was successfull
+	if(this->hSerial==INVALID_HANDLE_VALUE)
+	{
+		//If not success full display an Error
+		if(GetLastError()==ERROR_FILE_NOT_FOUND){
+
+			//Print Error if neccessary
+			printf("ERROR: Handle was not attached. Reason: %s not available.\n");
+
+		}
+		else
+		{
+			printf("ERROR!!!");
+		}
+	}
+	else
+	{
+		//If connected we try to set the comm parameters
+		DCB dcbSerialParams = {0};
+
+		//Try to get the current
+		if (!GetCommState(this->hSerial, &dcbSerialParams))
+		{
+			//If impossible, show an error
+			printf("failed to get current serial parameters!");
+		}
+		else
+		{
+			//Define serial connection parameters for the arduino board
+			dcbSerialParams.BaudRate=CBR_9600;
+			dcbSerialParams.ByteSize=8;
+			dcbSerialParams.StopBits=ONESTOPBIT;
+			dcbSerialParams.Parity=NOPARITY;
+
+			 //Set the parameters and check for their proper application
+			 if(!SetCommState(hSerial, &dcbSerialParams))
+			 {
+				printf("ALERT: Could not set Serial Port parameters");
+			 }
+			 else
+			 {
+				 //If everything went fine we're connected
+				 this->connected = true;
+				 //We wait 2s as the arduino board will be reseting
+				 Sleep(ARDUINO_WAIT_TIME);
+			 }
+		}
+	}
+
+}
+
+Serial::~Serial()
+{
+	//Check if we are connected before trying to disconnect
+	if(this->connected)
+	{
+		//We're no longer connected
+		this->connected = false;
+		//Close the serial handler
+		CloseHandle(this->hSerial);
+	}
+}
+
+int Serial::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;
+
+	//Use the ClearCommError function to get status info on the Serial port
+	ClearCommError(this->hSerial, &this->errors, &this->status);
+
+	//Check if there is something to read
+	if(this->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(this->status.cbInQue>nbChar)
+		{
+			toRead = nbChar;
+		}
+		else
+		{
+			toRead = this->status.cbInQue;
+		}
+
+		//Try to read the require number of chars, and return the number of read bytes on success
+		if(ReadFile(this->hSerial, buffer, toRead, &bytesRead, NULL) && bytesRead != 0)
+		{
+			return bytesRead;
+		}
+
+	}
+
+	//If nothing has been read, or that an error was detected return -1
+	return -1;
+
+}
+
+
+bool Serial::WriteData(char *buffer, unsigned int nbChar)
+{
+	DWORD bytesSend;
+
+	//Try to write the buffer on the Serial port
+	if(!WriteFile(this->hSerial, (void *)buffer, nbChar, &bytesSend, 0))
+	{
+		//In case it don't work get comm error and return false
+		ClearCommError(this->hSerial, &this->errors, &this->status);
+
+		return false;
+	}
+	else
+		return true;
+}
+
+bool Serial::IsConnected()
+{
+	//Simply return the connection status
+	return this->connected;
+}