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Diffstat (limited to 'Marlin/src/HAL/shared/servo.h')
| -rw-r--r-- | Marlin/src/HAL/shared/servo.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/Marlin/src/HAL/shared/servo.h b/Marlin/src/HAL/shared/servo.h new file mode 100644 index 0000000..c2560a8 --- /dev/null +++ b/Marlin/src/HAL/shared/servo.h @@ -0,0 +1,115 @@ +/** + * Marlin 3D Printer Firmware + * Copyright (c) 2020 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 <https://www.gnu.org/licenses/>. + * + */ +#pragma once + +/** + * servo.h - Interrupt driven Servo library for Arduino using 16 bit timers- Version 2 + * Copyright (c) 2009 Michael Margolis. All right reserved. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * A servo is activated by creating an instance of the Servo class passing the desired pin to the attach() method. + * The servos are pulsed in the background using the value most recently written using the write() method + * + * Note that analogWrite of PWM on pins associated with the timer are disabled when the first servo is attached. + * Timers are seized as needed in groups of 12 servos - 24 servos use two timers, 48 servos will use four. + * The sequence used to seize timers is defined in timers.h + * + * The methods are: + * + * Servo - Class for manipulating servo motors connected to Arduino pins. + * + * attach(pin ) - Attaches a servo motor to an i/o pin. + * attach(pin, min, max ) - Attaches to a pin setting min and max values in microseconds + * default min is 544, max is 2400 + * + * write() - Sets the servo angle in degrees. (invalid angle that is valid as pulse in microseconds is treated as microseconds) + * writeMicroseconds() - Sets the servo pulse width in microseconds + * read() - Gets the last written servo pulse width as an angle between 0 and 180. + * readMicroseconds() - Gets the last written servo pulse width in microseconds. (was read_us() in first release) + * attached() - Returns true if there is a servo attached. + * detach() - Stops an attached servos from pulsing its i/o pin. + * move(angle) - Sequence of attach(0), write(angle), + * With DEACTIVATE_SERVOS_AFTER_MOVE wait SERVO_DELAY and detach. + */ + +#if IS_TEENSY32 + #include "../TEENSY31_32/Servo.h" +#elif IS_TEENSY35 || IS_TEENSY36 + #include "../TEENSY35_36/Servo.h" +#elif IS_TEENSY40 || IS_TEENSY41 + #include "../TEENSY40_41/Servo.h" +#elif defined(TARGET_LPC1768) + #include "../LPC1768/Servo.h" +#elif defined(__STM32F1__) || defined(TARGET_STM32F1) + #include "../STM32F1/Servo.h" +#elif defined(ARDUINO_ARCH_STM32) + #include "../STM32/Servo.h" +#elif defined(ARDUINO_ARCH_ESP32) + #include "../ESP32/Servo.h" +#else + #include <stdint.h> + + #if defined(__AVR__) || defined(ARDUINO_ARCH_SAM) || defined(__SAMD51__) + // we're good to go + #else + #error "This library only supports boards with an AVR, SAM3X or SAMD51 processor." + #endif + + #define Servo_VERSION 2 // software version of this library + + class Servo { + public: + Servo(); + int8_t attach(const int pin); // attach the given pin to the next free channel, set pinMode, return channel number (-1 on fail) + int8_t attach(const int pin, const int min, const int max); // as above but also sets min and max values for writes. + void detach(); + void write(int value); // if value is < 200 it is treated as an angle, otherwise as pulse width in microseconds + void writeMicroseconds(int value); // write pulse width in microseconds + void move(const int value); // attach the servo, then move to value + // if value is < 200 it is treated as an angle, otherwise as pulse width in microseconds + // if DEACTIVATE_SERVOS_AFTER_MOVE wait SERVO_DELAY, then detach + int read(); // returns current pulse width as an angle between 0 and 180 degrees + int readMicroseconds(); // returns current pulse width in microseconds for this servo (was read_us() in first release) + bool attached(); // return true if this servo is attached, otherwise false + + private: + uint8_t servoIndex; // index into the channel data for this servo + int8_t min; // minimum is this value times 4 added to MIN_PULSE_WIDTH + int8_t max; // maximum is this value times 4 added to MAX_PULSE_WIDTH + }; + +#endif |