Firmware2/Marlin/src/feature/emergency_parser.h

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/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#pragma once
/**
* emergency_parser.h - Intercept special commands directly in the serial stream
*/
#define FORCE_INLINE __attribute__((always_inline)) inline
// External references
extern volatile bool wait_for_user, wait_for_heatup;
void quickstop_stepper();
class EmergencyParser {
public:
// Currently looking for: M108, M112, M410
enum State : char {
EP_RESET,
EP_N,
EP_M,
EP_M1,
EP_M10,
EP_M108,
EP_M11,
EP_M112,
EP_M4,
EP_M41,
EP_M410,
EP_IGNORE // to '\n'
};
static bool killed_by_M112;
EmergencyParser() { enable(); }
FORCE_INLINE static void enable() { enabled = true; }
FORCE_INLINE static void disable() { enabled = false; }
FORCE_INLINE static void update(State &state, const uint8_t c) {
switch (state) {
case EP_RESET:
switch (c) {
case ' ': break;
case 'N': state = EP_N; break;
case 'M': state = EP_M; break;
default: state = EP_IGNORE;
}
break;
case EP_N:
switch (c) {
case '0': case '1': case '2':
case '3': case '4': case '5':
case '6': case '7': case '8':
case '9': case '-': case ' ': break;
case 'M': state = EP_M; break;
default: state = EP_IGNORE;
}
break;
case EP_M:
switch (c) {
case ' ': break;
case '1': state = EP_M1; break;
case '4': state = EP_M4; break;
default: state = EP_IGNORE;
}
break;
case EP_M1:
switch (c) {
case '0': state = EP_M10; break;
case '1': state = EP_M11; break;
default: state = EP_IGNORE;
}
break;
case EP_M10:
state = (c == '8') ? EP_M108 : EP_IGNORE;
break;
case EP_M11:
state = (c == '2') ? EP_M112 : EP_IGNORE;
break;
case EP_M4:
state = (c == '1') ? EP_M41 : EP_IGNORE;
break;
case EP_M41:
state = (c == '0') ? EP_M410 : EP_IGNORE;
break;
case EP_IGNORE:
if (c == '\n') state = EP_RESET;
break;
default:
if (c == '\n') {
if (enabled) switch (state) {
case EP_M108:
wait_for_user = wait_for_heatup = false;
break;
case EP_M112:
killed_by_M112 = true;
break;
case EP_M410:
quickstop_stepper();
break;
default:
break;
}
state = EP_RESET;
}
}
}
private:
static bool enabled;
};
extern EmergencyParser emergency_parser;