//private void tmrScanningSession_TimerCallback(object state)
//{
// try
// {
// //_serialPort.DataReceived -= new SerialDataReceivedEventHandler(Read);
// //Manually stop the timer...
// tmrScanningSessionTimer.Change(Timeout.Infinite, Timeout.Infinite);
// scanner.sessionInProgress = false;
// }
// catch (Exception ex)
// {
// //if (log.IsErrorEnabled) log.Info("Error in tmrPrintLog_TimerCallback.. " + ex.Message.ToString());
// }
// finally
// {
// //if (log.IsInfoEnabled) log.Info("tmrPrinttLog_TimerCallback execution finished..");
// }
//}
private void Write(DS457 scanner, short reqLen)
{
short ctr;
try
{
scanner._serialPort.RtsEnable = true;
scanner._serialPort.Write(scanner.request, 0, reqLen);
for (ctr = 0; ctr < scanner.request.Length; ctr++)
{
scanner.reply[ctr] = 0;
}
scanner.statusCode = (int)DecoderStatus.NoError;
}
catch (TimeoutException tex)
{
//this.statusCode = (int)DecoderStatus.Error;
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Error in Write. Message - {1}|| Decoder - {2} .", DateTime.Now, tex.Message, scanner._serialPort.PortName));
writer.Flush();
writer.Close();
}
}
catch (Exception ex)
{
scanner.statusCode = (int)DecoderStatus.Error;
scanner.statusDesc = "Exception - " + ex.Message;
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Error in Write. Message - {1}|| Decoder - {2} .", DateTime.Now, ex.Message, scanner._serialPort.PortName));
writer.Flush();
writer.Close();
}
}
}
private byte Scan_Enable(DS457 scanner)
{
scanner.request[0] = 0x04; //Length of message not including Checksum.
scanner.request[1] = 0xE9; //OPCODE - SCAN_ENABLE
scanner.request[2] = 0x04; //Message Source - Host
scanner.request[3] = 0x00; // Status
byte[] checksum = CalculateChecksum(scanner, 4);
scanner.request[4] = checksum[0];
scanner.request[5] = checksum[1];
return (SendReceive(scanner, (byte)DecoderCommands.SCAN_ENABLE, 6));
}
private byte Stop_Session(DS457 scanner)
{
scanner.request[0] = 0x04; //Length of message not including Checksum.
scanner.request[1] = 0xE5; //OPCODE - STOP_SESSION
scanner.request[2] = 0x04; //Message Source - Host
scanner.request[3] = 0x00; // Status
byte[] checksum = CalculateChecksum(scanner, 4);
scanner.request[4] = checksum[0];
scanner.request[5] = checksum[1];
return (SendReceive(scanner, (byte)DecoderCommands.STOP_SESSION, 6));
}
private byte Param_Send(DS457 scanner, byte paramNum, byte paramValue)
{
scanner.request[0] = 0x07; //Length of message not including Checksum.
scanner.request[1] = 0xC6; //OPCODE - PARAM_SEND
scanner.request[2] = 0x04; //Message Source - Host
scanner.request[3] = 0x00; // Status
scanner.request[4] = 0xFF; // Beep Code - No beep.
scanner.request[5] = paramNum;
scanner.request[6] = paramValue;
byte[] checksum = CalculateChecksum(scanner, 7);
scanner.request[7] = checksum[0];
scanner.request[8] = checksum[1];
return (SendReceive(scanner, (byte)DecoderCommands.PARAM_SEND, 9));
}
private byte Request_Revision(DS457 scanner)
{
scanner.request[0] = 0x04; // Length of message not including Checksum.
scanner.request[1] = 0xA3; // OPCODE - REQUEST_REVISION
scanner.request[2] = 0x04; // Message Source - Host
scanner.request[3] = 0x00; // Status
byte[] checksum = CalculateChecksum(scanner, 4);
scanner.request[4] = checksum[0];
scanner.request[5] = checksum[1];
return (SendReceive(scanner, (byte)DecoderCommands.REQUEST_REVISION, 6));
}
private bool InterpretResponse(DS457 scanner)
{
bool flag = false;
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- InterpretResponse for Request - {1}.---- Response - {2}", DateTime.Now, scanner.request[1], scanner.reply[1]));
writer.Flush();
writer.Close();
}
switch (scanner.reply[1])
{
case 0xD1:
Console.WriteLine("Command execution Failed.");
// Check for the cause if cause is Checksum Failure then Resend.
if (scanner.reply[4] == 0x01)
{
flag = true;
}
break;
//case 0x00:
// flag = true;
// break;
}
return flag;
}
private void Open(DS457 scanner)
{
try
{
//_serialPort.DataReceived += new SerialDataReceivedEventHandler(Read);
//_serialPort.ErrorReceived += new SerialErrorReceivedEventHandler(OpError);
scanner._serialPort.Open();
}
catch (TimeoutException tex)
{
scanner.stateCode = (int)DecoderState.OFFLINE;
scanner.statusCode = (int)DecoderStatus.Error;
scanner.statusDesc = tex.Message + tex.InnerException;
}
catch (Exception ex)
{
scanner.stateCode = (int)DecoderState.OFFLINE;
scanner.statusCode = (int)DecoderStatus.Error;
scanner.statusDesc = ex.Message + ex.InnerException;
}
finally
{
scanner.stateCode = (int)DecoderState.ONLINE;
}
}
private void Init(bool reconnect)
{
if (!simulateDevice)
{
multiVend = Convert.ToInt16(string.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["MULTIVENDMACHINE"]) ? "1" : ConfigurationManager.AppSettings["MULTIVENDMACHINE"]);
for (short counter = 0; counter < multiVend; counter++)
{
bool loopFlag = true;
DS457 scanner;
// Create a new SerialPort object with default settings.
scanner = new DS457();
scanner._serialPort = new SerialPort();
// Allow the user to set the appropriate properties.
scanner._serialPort.PortName = string.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["DECODERCOMPORT" + counter.ToString()]) ? "com" + (++counter).ToString() : ConfigurationManager.AppSettings["DECODERCOMPORT" + counter.ToString()];
scanner._serialPort.BaudRate = int.Parse(string.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["DECODERBAUDRATE"]) ? "9600" : ConfigurationManager.AppSettings["DECODERBAUDRATE"]);
scanner._serialPort.Parity = (Parity)Enum.Parse(typeof(Parity), string.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["DECODERPARITY"]) ? "None" : ConfigurationManager.AppSettings["DECODERPARITY"]);
scanner._serialPort.DataBits = int.Parse(string.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["DECODERDATABITS"]) ? "8" : ConfigurationManager.AppSettings["DECODERDATABITS"]);
scanner._serialPort.StopBits = (StopBits)Enum.Parse(typeof(StopBits), string.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["DECODERSTOPBITS"]) ? "1" : ConfigurationManager.AppSettings["DECODERSTOPBITS"]);
scanner._serialPort.Handshake = (Handshake)Enum.Parse(typeof(Handshake), string.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["DECODERHANDSHAKE"]) ? "None" : ConfigurationManager.AppSettings["DECODERHANDSHAKE"]);
scanner._serialPort.WriteTimeout = int.Parse(string.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["DECODERWRITETIMEOUT"]) ? "3" : ConfigurationManager.AppSettings["DECODERWRITETIMEOUT"]) * 1000;
scanner._serialPort.ReadTimeout = int.Parse(string.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["DECODERREADTIMEOUT"]) ? "5" : ConfigurationManager.AppSettings["DECODERREADTIMEOUT"]) * 1000;
scanner.stateCode = (int)DecoderState.ONLINE;
scanner.statusCode = (int)DecoderStatus.Initializing;
scanner.statusDesc = "Initialization sequence happening.";
//tmrScanningSessionTimer = new System.Threading.Timer(new
//TimerCallback(this.tmrScanningSession_TimerCallback),
//null, System.Threading.Timeout.Infinite, 10 * 1000);
short loopCounter = 0;
while (loopFlag)
{
Open(scanner);
// Decode DataPacket Format
// Param #EEh
// Param Value Send Raw Decode Data 0x00
// Param Value Send Packeted Decode Data 0x01
// PARAM_SEND
if (Param_Send(scanner, 0xEE, 0x01) == 1)
{
// Trigger Mode
// Param #8Ah
// Param Value Level 0x00
// Param Value Presentation Mode 0x07
// Param Value Host 0x08
// Param Value Software Trigger Only Mode 0x0F
// PARAM_SEND
loopCounter = 0;
if (Param_Send(scanner, 0x8A, 0x08) == 1)
{
// Enable Scanning
//if (Scan_Enable() == 1)
//{
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Scanner mapped to {1} is initiallized successfully.", DateTime.Now, scanner._serialPort.PortName));
writer.Flush();
writer.Close();
}
scanner.id = counter;
scanner.statusCode = (int)DecoderStatus.NoError;
scanner.statusDesc = "Decoder Initialized Successfully.";
scanners.Add(scanner);
loopFlag = false;
//}
//else
// this.statusCode = (int)DecoderStatus.Error;
}
else
{
scanner.statusCode = (int)DecoderStatus.Error;
scanner.statusDesc = "Invalid Checksum error received.";
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Setting TriggerMode for scanner - {1} || state - {2} || status - {3} || Desc - {4}.", DateTime.Now, scanner._serialPort.PortName, scanner.stateCode, scanner.statusCode, scanner.statusDesc));
writer.Flush();
writer.Close();
}
scanner._serialPort.Close();
loopCounter++;
Thread.Sleep(2000);
}
}
else
{
scanner.statusCode = (int)DecoderStatus.Error;
scanner.statusDesc = "Invalid Checksum error received.";
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Setting DataPAcket Fromat for scanner - {1} || state - {2} || status - {3} || Desc - {4}.", DateTime.Now, scanner._serialPort.PortName, scanner.stateCode, scanner.statusCode, scanner.statusDesc));
writer.Flush();
writer.Close();
}
scanner._serialPort.Close();
loopCounter++;
Thread.Sleep(2000);
}
if (loopCounter == 3)
loopFlag = false;
}
}
}
else
{
this.stateCode = (int)DecoderState.ONLINE;
this.statusCode = (int)DecoderStatus.NoError;
this.statusDesc = "Decoder Initialized Successfully.";
}
}
private byte Cmd_Nak(DS457 scanner)
{
scanner.request[0] = 0x05; //Length of message not including Checksum.
scanner.request[1] = 0xD1; //OPCODE - START_SESSION
scanner.request[2] = 0x04; //Message Source - Host
scanner.request[3] = 0x00; //Status
scanner.request[4] = 0x01; //Cause
byte[] checksum = CalculateChecksum(scanner, 5);
scanner.request[5] = checksum[0];
scanner.request[6] = checksum[1];
return (SendReceive(scanner, (byte)DecoderCommands.CMD_NAK, 7));
}
private byte[] CalculateChecksum(DS457 scanner, short reqLen)
{
int counter = 0;
int sum = 0;
while (counter < reqLen)
{
sum += scanner.request[counter];
counter++;
}
// Calculate twos complement of the sum as per SSI protocol requirements.
sum = ~sum + (int)1;
byte[] checksum = new byte[2];
checksum[0] = (byte)(sum >> 8);
checksum[1] = (byte)(sum & 0xFF);
return checksum;
}
public byte SendReceive(DS457 scanner, byte command, short reqLen)
{
int ctr, iter = 0;
bool loopFlag = true;
try
{
while (loopFlag)
{
iter++;
if (iter == 4)
break;
if (iter > 1)
{
scanner.request[3] = 1;
byte[] checksum = CalculateChecksum(scanner, (short)(reqLen - 2));
scanner.request[reqLen - 2] = checksum[0];
scanner.request[reqLen - 1] = checksum[1];
}
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Before Issuing Command {1} for Decoder - {2}.", DateTime.Now, scanner.request[1], scanner._serialPort.PortName));
writer.Flush();
writer.Close();
}
Write(scanner, reqLen);
loopFlag = false;
switch (command)
{
case (byte)DecoderCommands.REQUEST_REVISION:
// REPLY_REVISION expected from the Decoder.
// If Write is successful then only issue Read.
Read(scanner, null, null);
// If Read is successful then proceed further.
break;
case (byte)DecoderCommands.SCAN_ENABLE:
// CMD_ACK/CMD_NAK expected from the decoder.
Read(scanner, null, null);
//if(reply[1] == 0xD0)
// Notify App of the Enable Scanning Event.
if ((InterpretResponse(scanner)) && (iter < 4))
loopFlag = true;
/*************/
// Publish the event indicating scanning has been enabled.
if (loopFlag)
{
Action handler = ScanEnabledEvent;
if (handler != null)
{
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Publishing ScanEnabledEvent.", DateTime.Now));
writer.Flush();
writer.Close();
}
handler();
}
}
break;
case (byte)DecoderCommands.START_SESSION:
// CMD_ACK/CMD_NAK expected from the decoder.
Read(scanner, null, null);
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- StartSession {1}{2}{3}{4}{5}{6}.", DateTime.Now, scanner.reply[0], scanner.reply[1], scanner.reply[2], scanner.reply[3], scanner.reply[4], scanner.reply[5]));
writer.Flush();
writer.Close();
}
//if (reply[1] == 0x00)
// Notify App of the Start Scanning Event.
if ((InterpretResponse(scanner)) && (iter < 4))
loopFlag = true;
/************
if(loopFlag)
Publish the event indicating scanning session has been started.
************/
if (!loopFlag)
{
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Before Issuing Read for Decode Event for Decoder {1}.", DateTime.Now, scanner._serialPort.PortName));
writer.Flush();
writer.Close();
}
loopFlag = false;
Action handler = TriggerPulledEvent;
if (handler != null)
{
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Publishing TriggerPulledEvent.", DateTime.Now));
writer.Flush();
writer.Close();
}
handler();
}
Read(scanner, null, null);
//Action handler = ScanEnabledEvent;
}
//Thread.Sleep(1000);
break;
case (byte)DecoderCommands.STOP_SESSION:
// CMD_ACK/CMD_NAK expected from the decoder.
Read(scanner, null, null);
//if(reply[1] == 0xD0)
// Notify App of the Stop Scanning Event.
if ((InterpretResponse(scanner)) && (iter < 4))
loopFlag = true;
if (loopFlag)
Thread.Sleep(1000);
/************
if(loopFlag)
Publish the event indicating scanning session has been stopped.
************/
if (!loopFlag)
{
//Action handler = ScanEnabledEvent;
Action handler = TriggerReleasedEvent;
if (handler != null)
{
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Publishing TriggerReleasedEvent.", DateTime.Now));
writer.Flush();
writer.Close();
}
handler();
}
}
break;
case (byte)DecoderCommands.CMD_ACK:
// No Reply expected from the decoder.
break;
case (byte)DecoderCommands.CMD_NAK:
// No Reply expected from the decoder.
break;
case (byte)DecoderCommands.SCAN_DISABLE:
// CMD_ACK/CMD_NAK expected from the decoder.
Read(scanner, null, null);
//if(reply[1] == 0xD0)
// Notify App of the Disable Scanning Event.
if ((InterpretResponse(scanner)) && (iter < 3))
loopFlag = true;
break;
case (byte)DecoderCommands.PARAM_SEND:
// CMD_ACK/CMD_NAK expected from the decoder.
Read(scanner, null, null);
//if(reply[1] == 0xD0)
// Notify App of the Disable Scanning Event.
//Thread.Sleep(2000);
if ((InterpretResponse(scanner)) && (iter < 4))
loopFlag = true;
break;
case (byte)DecoderCommands.WAKEUP:
// No Reply expected from the decoder.
break;
default:
break;
}
Thread.Sleep(300);
}
}
catch (TimeoutException tex)
{
scanner.statusCode = (int)DecoderStatus.Error;
this.statusDesc = "Exception - " + tex.Message;
}
catch (Exception ex)
{
scanner.statusCode = (int)DecoderStatus.Error;
scanner.statusDesc = "Exception - " + ex.Message;
Console.WriteLine("Exception - " + ex.Message);
}
finally
{
// Initialize Request and Response buffers.
// JK - Need to find a better way to initializa the buffers in c#.
for (ctr = 0; ctr < scanner.request.Length; ctr++)
{
scanner.request[ctr] = scanner.reply[ctr] = 0;
}
}
if ((loopFlag) && (iter == 4))
{
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- All three attempts to issue command failed.", DateTime.Now));
writer.Flush();
writer.Close();
}
//scanner.statusCode = (int)DecoderStatus.Error;
//this.statusDesc = "Command can't be processed successfully";
return 0;
}
else
{
scanner.statusCode = (int)DecoderStatus.NoError;
//this.statusDesc = "Command processed successfully";
return 1;
}
}
public void Read(DS457 scanner, object sender, SerialDataReceivedEventArgs e)
{
//byte[] barcode = new byte[100];
string cardid;
bool startOfResponse = true;
int replyLength = -1;
int replyOffset = 0;
if (!scanner.readInProgress)
{
try
{
scanner.readInProgress = true;
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Before Issuing Read for Command {1} on Decoder - {2}.", DateTime.Now, scanner.request[1], scanner._serialPort.PortName));
writer.Flush();
writer.Close();
}
scanner._serialPort.RtsEnable = false;
int readLen;
while (replyLength != replyOffset)
{
if (startOfResponse)
{
readLen = scanner._serialPort.Read(scanner.reply, 0, 1);
replyLength = scanner.reply[0] + 2;
replyOffset += readLen;
startOfResponse = false;
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- ReadLength - {1} ---- ReplyLength - {2}.---- ReplyOffset - {3} ---- Request - {4}", DateTime.Now, readLen, replyLength, replyOffset, scanner.request[1]));
writer.Flush();
writer.Close();
}
}
else
{
readLen = scanner._serialPort.Read(scanner.reply, replyOffset, replyLength - replyOffset);
replyOffset += readLen;
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- ReadLength - {1} ---- ReplyLength - {2}.---- ReplyOffset - {3} ---- Request - {4}", DateTime.Now, readLen, replyLength, replyOffset, scanner.request[1]));
writer.Flush();
writer.Close();
}
}
// end of reply reached
if (replyOffset == replyLength)
{
break;
//InterpretResponse(replyLength);
}
}
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Response for Request - {1}.---- {2}{3}{4}{5}{6}{7}", DateTime.Now, scanner.request[1], scanner.reply[1], scanner.reply[2], scanner.reply[3], scanner.reply[4], scanner.reply[5], scanner.reply[6]));
writer.Flush();
writer.Close();
}
// In case of DECODE_DATA the decoder sends unsolicited data.
// We need to treat this in a special manner.
if (scanner.reply[1] == 0xF3)
{
cardid = System.Text.Encoding.UTF8.GetString(scanner.reply, 5, scanner.reply[0] - 5);
// Publish Decode Event as the card id has been scanned successfully.
// Issue CMD_ACK.
Cmd_Ack(scanner);
Action<string> handler = BarcodeScannedEvent;
if (handler != null)
{
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Publishing BarcodeScannedEvent - Card ID {1}.", DateTime.Now, cardid));
writer.Flush();
writer.Close();
}
handler(cardid);
}
}
}
catch (TimeoutException tex)
{
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Error in Read - Message {1}.", DateTime.Now, tex.Message));
writer.Flush();
writer.Close();
}
//this.statusCode = (int)DecoderStatus.Error;
scanner.statusDesc = "Exception - " + tex.Message;
}
catch (Exception ex)
{
scanner.statusCode = (int)DecoderStatus.Error;
scanner.statusDesc = "Exception - " + ex.Message;
using (FileStream stream = new FileStream(@"SymbolDS457.log", FileMode.Append, FileAccess.Write))
{
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine(string.Format(@"Datetime {0} -- Error in Read - Message {1}.", DateTime.Now, ex.Message));
writer.Flush();
writer.Close();
}
}
finally
{
scanner.readInProgress = false;
}
}
}
