public static bool ExecuteSerialCommand(IntPtr serialCommRef, uint portNumber, string Command, out string bufferData, int timeOut, int delayBeforeReadingResponse)
{
bool portConnected = false;
string error = "";
int retVal;
string bufferDataFromCamera = "";
try
{
//this.Text = string.Format("Please wait while detecting the connected cameras...");
// this.Refresh();
retVal = ClserWrapper.clSerialInit((uint)portNumber, ref serialCommRef);
if (retVal != ClserWrapper.CL_ERR_NO_ERR)
{
error = string.Format("Cannot initialize serial port : {0}", portNumber);
portConnected = false;
}
retVal = ClserWrapper.clSetBaudRate(serialCommRef, ClserWrapper.CL_BAUDRATE_9600);
if (retVal != ClserWrapper.CL_ERR_NO_ERR)
{
error = string.Format("Cannot set baud rate 9600 for serial port {0}", portNumber);
portConnected = false;
}
// Check whether camera is a "e2v" camera
string command = Command.Contains(System.Environment.NewLine) ? Command : Command + System.Environment.NewLine;
if (GetResponseFromSerialPort(serialCommRef,
(uint)portNumber,
command,
timeOut,
out bufferDataFromCamera,
delayBeforeReadingResponse, out error))
{
portConnected = true;
}
else
{
portConnected = false;
throw new Exception(error);
}
}
catch (Exception ex)
{
portConnected = false;
bufferDataFromCamera = "";
throw new Exception(error);
}
ClserWrapper.clSerialClose(serialCommRef);
bufferData = bufferDataFromCamera;
return(portConnected);
}
/// <summary>
/// Gets the response from e2v camera. This function send the serial commands to the camera and read
/// the response from the camera. A maximum of three attempts are made to read the response from camera
/// in case of failures (such as internal error).
/// </summary>
/// <param name="serialComRef">The serial communication port reference.</param>
/// <param name="portNumber">The serial port number.</param>
/// <param name="command">The command.</param>
/// <param name="bufferData">The buffer to receive the response from camera.</param>
/// <returns></returns>
public static bool GetResponseFromSerialPort(IntPtr serialComRef,
uint portNumber,
string command,
int timeOut,
out string bufferData,
int delayBeforeReadingResponse, out string err)
{
char cont = 'y';
bool commandProcessingSuccess = true;
uint numberOfTrials = 0;
string error = "";
do
{
int retVal = ClserWrapper.clFlushPort(serialComRef);
if (retVal != ClserWrapper.CL_ERR_NO_ERR)
{
error = string.Format("Error in flushing serial port {0}. Error code : {1}", portNumber, retVal);
cont = 'y';
bufferData = "";
}
byte[] writeBuffer = System.Text.ASCIIEncoding.ASCII.GetBytes(command);
uint writeBufferSize = (uint)writeBuffer.Length;
retVal = ClserWrapper.clSerialWrite(serialComRef, writeBuffer, ref writeBufferSize,
(uint)timeOut);
if (retVal != ClserWrapper.CL_ERR_NO_ERR)
{
error = string.Format("Error in writing command to serial port {0}. Error Code : {1}. Commad written : {2}", portNumber, retVal, command);
cont = 'y';
commandProcessingSuccess = false;
bufferData = "";
}
else
{
System.Threading.Thread.Sleep(delayBeforeReadingResponse);
uint numBytes = 1024;
byte[] readBuffer = new byte[1024];
IntPtr ipReadBuffer = Marshal.AllocHGlobal(readBuffer.Length);
retVal = ClserWrapper.clSerialRead(serialComRef, ipReadBuffer, ref numBytes,
(uint)timeOut);
if (retVal == ClserWrapper.CL_ERR_NO_ERR)
{
Marshal.Copy(ipReadBuffer, readBuffer, 0, (int)numBytes);
readBuffer = readBuffer.Take((int)numBytes).ToArray();
string readBufferContents = System.Text.ASCIIEncoding.ASCII.GetString(readBuffer);
if (readBufferContents.IndexOf(">Ok\r") >= 0)
{
bufferData = readBufferContents;
commandProcessingSuccess = true;
cont = 'n';
}
else if (readBufferContents.IndexOf(">3\r") >= 0 || readBufferContents.IndexOf(">16\r") >= 0 ||
readBufferContents.IndexOf(">21\r") >= 0 || readBufferContents.IndexOf(">33\r") >= 0 ||
readBufferContents.IndexOf(">34\r") >= 0 || readBufferContents.IndexOf(">7\r") >= 0)
{
cont = 'y';
bufferData = "";
commandProcessingSuccess = false;
error = string.Format("Error in getting response from E2V camera. Reading from serial port {0}. Error code : {1}. Trial Number : {2}. Command sent to camera : {3}. Buffer response : {4} ",
portNumber, retVal, numberOfTrials, command, readBufferContents);
}
else
{
bufferData = readBufferContents;
commandProcessingSuccess = true;
cont = 'n';
}
}
else
{
commandProcessingSuccess = false;
bufferData = "";
error = string.Format("Error in getting response from E2V camera. Reading from serial port {0}. Error code : {1}. Trial Number : {2}. Command sent to camera : {3}",
portNumber, retVal, numberOfTrials, command);
}
}
} while ((cont == 'y') && ((numberOfTrials++) < 3));
err = error;
return(commandProcessingSuccess);
}
