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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2019 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/>.
- *
- */
- #ifdef ARDUINO_ARCH_ESP32
-
- #include "../../inc/MarlinConfig.h"
-
- #if HAS_SERVOS
-
- #include "HAL_Servo_ESP32.h"
-
- // Adjacent channels (0/1, 2/3 etc.) share the same timer and therefore the same frequency and resolution settings on ESP32,
- // so we only allocate servo channels up high to avoid side effects with regards to analogWrite (fans, leds, laser pwm etc.)
- int Servo::channel_next_free = 12;
-
- Servo::Servo() {
- this->channel = channel_next_free++;
- }
-
- int8_t Servo::attach(const int pin) {
- if (this->channel >= CHANNEL_MAX_NUM) return -1;
- if (pin > 0) this->pin = pin;
-
- ledcSetup(this->channel, 50, 16); // channel X, 50 Hz, 16-bit depth
- ledcAttachPin(this->pin, this->channel);
- return true;
- }
-
- void Servo::detach() { ledcDetachPin(this->pin); }
-
- int Servo::read() { return this->degrees; }
-
- void Servo::write(int degrees) {
- this->degrees = constrain(degrees, MIN_ANGLE, MAX_ANGLE);
- int us = map(this->degrees, MIN_ANGLE, MAX_ANGLE, MIN_PULSE_WIDTH, MAX_PULSE_WIDTH);
- int duty = map(us, 0, TAU_USEC, 0, MAX_COMPARE);
- ledcWrite(channel, duty);
- }
-
- void Servo::move(const int value) {
- constexpr uint16_t servo_delay[] = SERVO_DELAY;
- static_assert(COUNT(servo_delay) == NUM_SERVOS, "SERVO_DELAY must be an array NUM_SERVOS long.");
- if (this->attach(0) >= 0) {
- this->write(value);
- safe_delay(servo_delay[this->channel]);
- #if ENABLED(DEACTIVATE_SERVOS_AFTER_MOVE)
- this->detach();
- #endif
- }
- }
- #endif // HAS_SERVOS
-
- #endif // ARDUINO_ARCH_ESP32
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