relaunch ontop of latest grbl edge

code very messy but tested

sim/serial.c

@@ -0,0 +1,53 @@
+/*
+  serial.c - replacement for the modul of the same name in grbl
+    Make sure the simulator reads from stdin and writes to stdout.
+    Also print info about the last buffered block.
+
+  Part of Grbl Simulator
+
+  Copyright (c) 2012 Jens Geisler
+
+  Grbl is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  Grbl is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with Grbl.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "../serial.h"
+#include <stdio.h>
+#include "simulator.h"
+#include <stdio.h>
+
+void serial_write(uint8_t data) {
+  printBlock();
+  if(print_comment && data!='\n' && data!='\r') {
+	  fprintf(block_out_file, "# ");
+	  print_comment= 0;
+  }
+  if(data=='\n' || data=='\r')
+	  print_comment= 1;
+
+  fprintf(block_out_file, "%c", data);
+
+  // Indicate the end of processing a command. See simulator.c for details
+  runtime_second_call= 0;
+}
+
+
+uint8_t serial_read() {
+  int c;
+  if((c = fgetc(stdin)) != EOF) {
+	serial_write(c);
+    return c;
+  }
+    
+  return SERIAL_NO_DATA;
+}