David Garrsion / VarSpeedServo

Made changes to individually control servo speeds

Dependents:   VariableSpeedServo

Fork of Servo by Jasper Denkers

Servo.h@2:466f005a4dd5, 2015-10-11 (annotated)

Committer:
sierrasmith71
Date:
Sun Oct 11 20:50:48 2015 +0000
Revision:
2:466f005a4dd5
Parent:
1:352133517ccc
Child:
3:774dd54867f2
rev1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jdenkers 1:352133517ccc 1 /* mbed Servo Library without using PWM pins
jdenkers 1:352133517ccc 2 * Copyright (c) 2010 Jasper Denkers
jdenkers 1:352133517ccc 3 *
jdenkers 1:352133517ccc 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
jdenkers 1:352133517ccc 5 * of this software and associated documentation files (the "Software"), to deal
jdenkers 1:352133517ccc 6 * in the Software without restriction, including without limitation the rights
jdenkers 1:352133517ccc 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
jdenkers 1:352133517ccc 8 * copies of the Software, and to permit persons to whom the Software is
jdenkers 1:352133517ccc 9 * furnished to do so, subject to the following conditions:
jdenkers 1:352133517ccc 10 *
jdenkers 1:352133517ccc 11 * The above copyright notice and this permission notice shall be included in
jdenkers 1:352133517ccc 12 * all copies or substantial portions of the Software.
jdenkers 1:352133517ccc 13 *
jdenkers 1:352133517ccc 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
jdenkers 1:352133517ccc 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
jdenkers 1:352133517ccc 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
jdenkers 1:352133517ccc 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
jdenkers 1:352133517ccc 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
jdenkers 1:352133517ccc 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
jdenkers 1:352133517ccc 20 * THE SOFTWARE.
jdenkers 1:352133517ccc 21 */
jdenkers 1:352133517ccc 22
jdenkers 0:30b972d2dcec 23 #ifndef MBED_SERVO_H
jdenkers 0:30b972d2dcec 24 #define MBED_SERVO_H
jdenkers 0:30b972d2dcec 25
jdenkers 0:30b972d2dcec 26 #include "mbed.h"
jdenkers 0:30b972d2dcec 27
jdenkers 1:352133517ccc 28 /** Class to control a servo on any pin, without using pwm
jdenkers 1:352133517ccc 29 *
jdenkers 1:352133517ccc 30 * Example:
jdenkers 1:352133517ccc 31 * @code
jdenkers 1:352133517ccc 32 * // Keep sweeping servo from left to right
jdenkers 1:352133517ccc 33 * #include "mbed.h"
jdenkers 1:352133517ccc 34 * #include "Servo.h"
jdenkers 1:352133517ccc 35 *
jdenkers 1:352133517ccc 36 * Servo Servo1(p20);
jdenkers 1:352133517ccc 37 *
jdenkers 1:352133517ccc 38 * Servo1.Enable(1500,20000);
jdenkers 1:352133517ccc 39 *
jdenkers 1:352133517ccc 40 * while(1) {
jdenkers 1:352133517ccc 41 * for (int pos = 1000; pos < 2000; pos += 25) {
jdenkers 1:352133517ccc 42 * Servo1.SetPosition(pos);
jdenkers 1:352133517ccc 43 * wait_ms(20);
jdenkers 1:352133517ccc 44 * }
jdenkers 1:352133517ccc 45 * for (int pos = 2000; pos > 1000; pos -= 25) {
jdenkers 1:352133517ccc 46 * Servo1.SetPosition(pos);
jdenkers 1:352133517ccc 47 * wait_ms(20);
jdenkers 1:352133517ccc 48 * }
jdenkers 1:352133517ccc 49 * }
jdenkers 1:352133517ccc 50 * @endcode
jdenkers 1:352133517ccc 51 */
jdenkers 1:352133517ccc 52
jdenkers 0:30b972d2dcec 53 class Servo {
jdenkers 1:352133517ccc 54
jdenkers 0:30b972d2dcec 55 public:
jdenkers 1:352133517ccc 56 /** Create a new Servo object on any mbed pin
jdenkers 1:352133517ccc 57 *
jdenkers 1:352133517ccc 58 * @param Pin Pin on mbed to connect servo to
jdenkers 1:352133517ccc 59 */
jdenkers 0:30b972d2dcec 60 Servo(PinName Pin);
jdenkers 1:352133517ccc 61
jdenkers 1:352133517ccc 62 /** Change the position of the servo. Position in us
jdenkers 1:352133517ccc 63 *
jdenkers 1:352133517ccc 64 * @param NewPos The new value of the servos position (us)
jdenkers 1:352133517ccc 65 */
jdenkers 0:30b972d2dcec 66 void SetPosition(int NewPos);
jdenkers 1:352133517ccc 67
sierrasmith71 2:466f005a4dd5 68 /** speed oonversion from arbitary range of 1-50 to us to set Speed Ticker rate.
sierrasmith71 2:466f005a4dd5 69 * @param int 1-50
sierrasmith71 2:466f005a4dd5 70 */
sierrasmith71 2:466f005a4dd5 71 int SpeedConvert (int _speed);
sierrasmith71 2:466f005a4dd5 72
jdenkers 1:352133517ccc 73 /** Enable the servo. Without enabling the servo won't be running. Startposition and period both in us.
jdenkers 1:352133517ccc 74 *
jdenkers 1:352133517ccc 75 * @param StartPos The position of the servo to start (us)
sierrasmith71 2:466f005a4dd5 76 * @param RefreshRate.set in Hz The time between every servo pulse. 20000 us = 50 Hz(standard) (us)
sierrasmith71 2:466f005a4dd5 77 Analog servos typically use a 50Hz refresh rate, while digital servos can use up to a 300Hz refresh rate.
sierrasmith71 2:466f005a4dd5 78 * @parm _speed The time between updating the pulse width of the servo pulses --controls speed of servo movement
jdenkers 1:352133517ccc 79 */
sierrasmith71 2:466f005a4dd5 80 void Enable(int StartPos, int RefreshRate, int _speed);
jdenkers 1:352133517ccc 81
jdenkers 1:352133517ccc 82 /** Disable the servo. After disabling the servo won't get any signal anymore
jdenkers 1:352133517ccc 83 *
jdenkers 1:352133517ccc 84 */
sierrasmith71 2:466f005a4dd5 85 void Update();
sierrasmith71 2:466f005a4dd5 86 int speed;
sierrasmith71 2:466f005a4dd5 87 int CurrentPosition;
jdenkers 0:30b972d2dcec 88 void Disable();
jdenkers 0:30b972d2dcec 89
jdenkers 0:30b972d2dcec 90 private:
jdenkers 0:30b972d2dcec 91 void StartPulse();
jdenkers 0:30b972d2dcec 92 void EndPulse();
jdenkers 0:30b972d2dcec 93 int Position;
sierrasmith71 2:466f005a4dd5 94 int Period;
sierrasmith71 2:466f005a4dd5 95 int NewPosition;
sierrasmith71 2:466f005a4dd5 96 //int speed;
sierrasmith71 2:466f005a4dd5 97 //int CurrentPosition;
jdenkers 0:30b972d2dcec 98 DigitalOut ServoPin;
jdenkers 0:30b972d2dcec 99 Ticker Pulse;
sierrasmith71 2:466f005a4dd5 100 Ticker Speed;
jdenkers 0:30b972d2dcec 101 Timeout PulseStop;
jdenkers 0:30b972d2dcec 102 };
jdenkers 0:30b972d2dcec 103
jdenkers 0:30b972d2dcec 104 #endif