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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/>.
- *
- */
-
- #include "../gcode.h"
- #include "../../Marlin.h" // for pin_is_protected and idle()
- #include "../../module/stepper.h"
-
- /**
- * M226: Wait until the specified pin reaches the state required (M226 P<pin> S<state>)
- */
- void GcodeSuite::M226() {
- if (parser.seen('P')) {
- const int pin_number = PARSED_PIN_INDEX('P', 0),
- pin_state = parser.intval('S', -1); // required pin state - default is inverted
- const pin_t pin = GET_PIN_MAP_PIN(pin_number);
-
- if (WITHIN(pin_state, -1, 1) && pin > -1 && !pin_is_protected(pin)) {
-
- int target = LOW;
-
- stepper.synchronize();
-
- pinMode(pin, INPUT);
- switch (pin_state) {
- case 1:
- target = HIGH;
- break;
- case 0:
- target = LOW;
- break;
- case -1:
- target = !digitalRead(pin);
- break;
- }
-
- while (digitalRead(pin) != target) idle();
-
- } // pin_state -1 0 1 && pin > -1
- } // parser.seen('P')
- }
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