test check in

protocol.h

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+/*
+  protocol.h - controls Grbl execution protocol and procedures
+
+  Part of grblHAL
+
+  Copyright (c) 2011-2016 Sungeun K. Jeon for Gnea Research LLC
+  Copyright (c) 2009-2011 Simen Svale Skogsrud
+
+  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/>.
+*/
+
+#ifndef _PROTOCOL_H_
+#define _PROTOCOL_H_
+
+// Line buffer size from the input stream to be executed.
+// NOTE: Not a problem except for extreme cases, but the line buffer size can be too small
+// and g-code blocks can get truncated. Officially, the g-code standards support up to 256
+// characters. In future versions, this will be increased, when we know how much extra
+// memory space we can invest into here or we re-write the g-code parser not to have this
+// buffer.
+#ifndef LINE_BUFFER_SIZE
+  #define LINE_BUFFER_SIZE 257 // 256 characters plus terminator
+#endif
+
+// Starts Grbl main loop. It handles all incoming characters from the input stream and executes
+// them as they complete. It is also responsible for finishing the initialization procedures.
+bool protocol_main_loop (void);
+
+// Checks and executes a realtime command at various stop points in main program
+bool protocol_execute_realtime (void);
+bool protocol_exec_rt_system (void);
+void protocol_execute_noop (uint_fast16_t state);
+bool protocol_enqueue_rt_command (on_execute_realtime_ptr fn);
+
+// Executes the auto cycle feature, if enabled.
+void protocol_auto_cycle_start (void);
+
+// Block until all buffered steps are executed
+bool protocol_buffer_synchronize (void);
+
+bool protocol_enqueue_realtime_command (char c);
+bool protocol_enqueue_gcode (char *data);
+void protocol_message (char *message);
+
+#endif