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[on:]

Hello

 Sorry for my bad English.
 In the German forum could not help me.

 I want to use the library Servo.h servo signals to generate 200Hz period.
 I need that for position control of brushless controllers.

 How do I change the library?

 Thank you for your help.

 Kay

[Reply #1 on:]

I need that for position control of brushless controllers.

What brushless controller? Most can be controlled using the servo library as-is.

[Reply #2 on:]

This is the position control for a quadrocopter.
 At 200Hz, the system is much smoother than 50Hz.

How do I change the library?

Kay

[Reply #3 on:]

Does anyone know a solution?

[Reply #4 on:]

What brushless controller? Link to datasheet please.

[Reply #5 on:]

I want to use the library Servo.h servo signals to generate 200Hz period. I need that for position control of brushless controllers.

Is your brushless controller compatable with this modification? You might get more info from the coptor forums.

[Reply #6 on:]

I got it to output at 400 Hz by changing the timer prescaler. But that may be too fast. From what I read Servo motors expect pulses about every 20 mS (50 Hz).

[Reply #7 on:]

I got it to output at 400 Hz by changing the timer prescaler.

How did you do that?
 What I have to change the library?

 Thank you for an answer.

Kay

[Reply #8 on:]

Code:

#define REFRESH_INTERVAL    2500

Or something along those lines?

But that's awfully close to

Code:

#define MAX_PULSE_WIDTH      2400

[Reply #9 on:]

Code:

#define REFRESH_INTERVAL    2500

Or something along those lines?

I changed this parameter of 20000 (50 Hz) to 5000 (200Hz).
 The signal has not changed, why?

 Thank you for an answer.

 Kay

[Reply #10 on:]

Because you didn't recompile it?

[Reply #11 on:]

Because you didn't recompile it?

?

I have the file Servo.h changed the parameter and then saved the file.
 Then a small test program written and loaded fresh on the Arduino Uno.

 Is not that enough?

Kay

[Reply #12 on:]

It goes :-)

 I am very stupid.
 I've had the Arduino folder 2X, edit the file in the wrong folder Servo.h.
 I'm sorry for my stupidity.
 Thank you for your help.

 Kay Gruss

[Reply #13 on:]

I got it to output at 400 Hz by changing the timer prescaler.

How did you do that?

I used this:

http://www.arduino.cc/playground/Code/PwmFrequency