private void timerComHandler_Tick(object sender, EventArgs e)
{
// keep track of incoming bytes
int result = 0;
int totalBytes = 0;
string response;
int confirmationsReceived = 1;
// string to be sent via Serial
string textOut = "";
// state - PORT_RUNNING
// type - permanent state
// performs - continuosly read COM port data and request redrawing of newly incoming data
if ((currentPortState == PortStates.PORT_WAITING_GRBL_HEADER) ||
(currentPortState == PortStates.PORT_RUNNING_IDLE) ||
(currentPortState == PortStates.PORT_RUNNING_TRANSMIT))
{
byte[] localData = new byte[1024];
totalBytes = serialPort.BytesToRead;
int readBytes = totalBytes;
//if (serialPort.ReadBufferSize > 0)
//{
response = serialPort.ReadExisting();
// filter out empty responses
if (response != "")
{
ComHandler.ConsoleWrite(response);
}
// if "Grbl" substring has arrived, then we definitely are connected to a GRBL machine
if (response.Contains("Grbl"))
{
currentPortState = PortStates.PORT_RUNNING_IDLE;
}
else
{ // process normal incoming data
confirmationsReceived = ComHandler.ProcessIncomingData(response);
}
if (confirmationsReceived > 0)
{
currentTxState = TransmitStates.TX_IDLE;
}
//Console.Write(confirmationsReceived);
//glControl1.Invalidate();
//}
// hadle transmission of GCODE file
if (currentPortState == PortStates.PORT_RUNNING_TRANSMIT)
{
if ((!GcodeHandler.GcodeFileDataFinished) && (currentTxState == TransmitStates.TX_IDLE))
{
textOut = GcodeHandler.GetNextGcodeBlock();
ComHandler.ConsoleWrite(textOut + '\t');
serialPort.Write(textOut + "\r");
currentTxState = TransmitStates.TX_PENDING;
toolStripProgressBar1.Value = GcodeHandler.GcodeFilePercent;
}
else if (GcodeHandler.GcodeFileDataFinished)
{
currentPortState = PortStates.PORT_RUNNING_IDLE;
toolStripProgressBar1.Value = 100;
}
}
}
}
