Simon Ford / Servo

A class to control a model R/C servo, using a PwmOut

Dependents:   mbedDemoDisplay mbedDemoDisplay Servo_HelloWorld Initialmbedrobotprogram ... more

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Servo Class Reference
Public Member Functions

Servo Class Reference

Servo control class, based on a PwmOut. More...

#include <Servo.h>

Public Member Functions

 Servo (PinName pin)
 Create a servo object connected to the specified PwmOut pin.
void write (float percent)
 Set the servo position, normalised to it's full range.
float read ()
 Read the servo motors current position.
void position (float degrees)
 Set the servo position.
void calibrate (float range=0.0005, float degrees=45.0)
 Allows calibration of the range and angles for a particular servo.
Servo & operator= (float percent)
 Shorthand for the write and read functions.

Detailed Description

Servo control class, based on a PwmOut.

Example: 

 // Continuously sweep the servo through it's full range
 #include "mbed.h"
 #include "Servo.h"
 
 Servo myservo(p21);
 
 int main() {
     while(1) {
         for(int i=0; i<100; i++) {
             myservo = i/100.0;
             wait(0.01);
         }
         for(int i=100; i>0; i--) {
             myservo = i/100.0;
             wait(0.01);
         }
     }
 }

Definition at line 52 of file Servo.h.

Constructor & Destructor Documentation

Servo ( PinName  pin )

Create a servo object connected to the specified PwmOut pin.

Parameters:
pinPwmOut pin to connect to

Definition at line 37 of file Servo.cpp.

Member Function Documentation

void calibrate ( float  range = 0.0005,
float  degrees = 45.0 
)

Allows calibration of the range and angles for a particular servo.

Parameters:
rangePulsewidth range from center (1.5ms) to maximum/minimum position in seconds
degreesAngle from centre to maximum/minimum position in degrees

Definition at line 53 of file Servo.cpp.

Servo & operator= ( float  percent )

Shorthand for the write and read functions.

Definition at line 62 of file Servo.cpp.

void position ( float  degrees )

Set the servo position.

Parameters:
degreesServo position in degrees

Definition at line 48 of file Servo.cpp.

float read (  )

Read the servo motors current position.

Parameters:
returnsA normalised number 0.0-1.0 representing the full range.

Definition at line 58 of file Servo.cpp.

void write ( float  percent )

Set the servo position, normalised to it's full range.

Parameters:
percentA normalised number 0.0-1.0 to represent the full range.

Definition at line 42 of file Servo.cpp.

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