Help with Simpleservo library

[jbalat]

I am using the simpleservo library to drive a big servo with external power supply.
I noticed there is no refresh command like in the arduino servo library so when I drive the servo to its position sometimes I am able to push it back by hand.
I guess I can keep writing it’s current position, however wondering if there is a better way?

[jbalat]

Please see code below.
I am reading 2 push buttons using no resistors.
One button makes the servo go one way and the other button makes it go the other way.
I was thinking I can use this to electronically change gears on my bike??

Ideally I will want to learn these angles and store and read them from memory, but I need to get the servo to feedback when its in the wrong position and drive back to it.. I tried to use the .read command but it didnt work?
 

Code: [Select]

#include <SimpleServo.h>


SimpleServo servoLeft;          // Define left servo

#define ACTIVATED LOW
const int buttonPin = 2;     // the number of the pushbutton pin
const int buttonPin1 = 3;     // the number of the pushbutton pin 1
const int ledPin =  1;

// variables will change:
int buttonState = 0;          // variable for reading the pushbutton status
int buttonState1 = 0;          // variable for reading the pushbutton status
int a = 90;                       //rotation angle                     //rotation angle
int pos = 0;
int astep = 15;

void setup() {
  pinMode(ledPin, OUTPUT);
  servoLeft.attach(0);  // Set left servo to digital pin 10
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
  digitalWrite(buttonPin,HIGH);
  pinMode(buttonPin1, INPUT);
  digitalWrite(buttonPin1,HIGH);
  servoLeft.write(a);
}

void loop() {            // Loop through motion tests
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);
  buttonState1 = digitalRead(buttonPin1);
  //servoLeft.write(a);
 
  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
  if (buttonState == ACTIVATED) {
    // turn LED on:
    digitalWrite(ledPin, HIGH);
    forward();             // Example: move forward
    delay(100);           // Wait 2000 milliseconds (2 seconds)
  } else {
    // turn LED off:
    digitalWrite(ledPin, LOW);
  }
 
  if (buttonState1 == ACTIVATED) {
    // turn LED on:
    digitalWrite(ledPin, HIGH);
    reverse();             // Example: move forward
    delay(100);           // Wait 2000 milliseconds (2 seconds)
  } else {
    // turn LED off:
    digitalWrite(ledPin, LOW);
  } 
}


// Motion routines for forward, reverse, turns, and stop
void forward() {
   for(pos = a; pos <= a+astep; pos += 1)        // goes from 0 degrees to 180 degrees
  {                                         // in steps of 1 degree
    servoLeft.write(pos);                     // tell servo to go to position in variable 'pos'
    delay(5);                              // waits 15 milliseconds for the servo to reach the position
   // SoftwareServo::refresh();               // required by SoftwareServo Library to sweep correctly
  }           
  a +=astep;
}


void reverse() {
  for(pos = a; pos >= a-astep; pos -= 1)        // goes from 0 degrees to 180 degrees
  {                                         // in steps of 1 degree
    servoLeft.write(pos);                     // tell servo to go to position in variable 'pos'
    delay(5);                                 // waits 15 milliseconds for the servo to reach the position
  }
  a -=astep;
}

Adding this to the top of the loop works but its really noisy

Code: [Select]

void loop() {            // Loop through motion tests
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);
  buttonState1 = digitalRead(buttonPin1);
  servoLeft.write(a-1);
  servoLeft.write(a);
  delay(15);