M503 implemented. Prints the config file to USB.

GCodes.cpp

@@ -60,6 +60,7 @@ void GCodes::Init()
   fileBeingPrinted = NULL;
   fileToPrint = NULL;
   fileBeingWritten = NULL;
+  configFile = NULL;
   homeX = false;
   homeY = false;
   homeZ = false;
@@ -581,6 +582,44 @@ void GCodes::RunConfigurationGCodes()
       fileToPrint = NULL;
 }
 
+bool GCodes::SendConfigToLine()
+{
+	if(configFile == NULL)
+	{
+		configFile = platform->GetFileStore(platform->GetSysDir(), platform->GetConfigFile(), false);
+		if(configFile == NULL)
+		{
+			platform->Message(HOST_MESSAGE, "Configuration file not found\n");
+			return true;
+		}
+		platform->GetLine()->Write('\n');
+	}
+
+	char b;
+
+	while(configFile->Status() & byteAvailable)
+	{
+		if(configFile->Read(b))
+		{
+			platform->GetLine()->Write(b);
+			if(b == '\n')
+				return false;
+		} else
+		{
+			platform->GetLine()->Write('\n');
+			configFile->Close();
+			configFile = NULL;
+			return true;
+		}
+	}
+
+	// Should never get here
+
+	configFile->Close();
+	configFile = NULL;
+	return true;
+}
+
 
 // Function to handle dwell delays.  Return true for
 // dwell finished, false otherwise.
@@ -1194,6 +1233,10 @@ bool GCodes::ActOnGcode(GCodeBuffer *gb)
     case 304: // Set thermistor parameters
     	break;
 
+    case 503: // Print parameters
+    	result = SendConfigToLine();
+    	break;
+
     case 550: // Set machine name
         	if(gb->Seen('P'))
         		reprap.GetWebserver()->SetName(gb->GetString());

GCodes.h

@@ -100,6 +100,7 @@ class GCodes
     void HandleReply(bool error, bool fromLine, char* reply, char gMOrT, int code, bool resend);
     char* OpenFileToWrite(char* fileName, GCodeBuffer *gb);
     void WriteGCodeToFile(GCodeBuffer *gb);
+    bool SendConfigToLine();
 
     int8_t Heater(int8_t head);
     Platform* platform;
@@ -125,6 +126,7 @@ class GCodes
     FileStore* fileBeingPrinted;
     FileStore* fileToPrint;
     FileStore* fileBeingWritten;
+    FileStore* configFile;
     int8_t selectedHead;
     bool homeX;
     bool homeY;

Platform.cpp

@@ -622,6 +622,7 @@ bool FileStore::Open(char* directory, char* fileName, bool write)
 		  snprintf(scratchString, STRING_LENGTH, "%d", openReturn);
 		  platform->Message(HOST_MESSAGE, scratchString);
 		  platform->Message(HOST_MESSAGE, "\n");
+		  Close();
 		  return false;
 	  }
 	  bufferPointer = 0;
@@ -636,9 +637,10 @@ bool FileStore::Open(char* directory, char* fileName, bool write)
 		  snprintf(scratchString, STRING_LENGTH, "%d", openReturn);
 		  platform->Message(HOST_MESSAGE, scratchString);
 		  platform->Message(HOST_MESSAGE, "\n");
+		  Close();
 		  return false;
-	  }
+	  } else
-	  bufferPointer = FILE_BUF_LEN;
+		  ReadBuffer();
   }
 
   inUse = true;