[AVR] How to control Servo motor using ATMEGA32?

[Narendra1190]

Hi,
I am using Atmega32 microcontroller with 8MHz external crystal oscillator and Servo motor of

Operating Voltage : 4.8-6.0V
PWM Input Range : Pulse Cycle 20±2ms, Positive Pulse 1~2ms
STD Direction : Counter Clockwise / Pulse Traveling 1500 to 1900µsec
Stall Torque : 3 Kgf.cm(41.3 oz/in) at 4.8V, 3.2 Kgf.cm(44 oz/in) at 6V
Operating Speed : 0.2 sec/ 60° at 4.8V, 0.18 sec/ 60° at 6V at no load
Weight : 38g (1.27 oz)
Size : 41.3*20.3*38.7*48.5*10
Plug Available : FUT, JR
Special Feature : Heavy Duty Plastic Gears, Economy Servo.


I want make servo to rotate 0 degree and 180 degree back and forth continuesly. how can i set timer and counter mode.i refered some tutorial but my motor rotatin continusly in one direction with around 10 degree..plz help me

 

[ragul07]

try initially with some pulses from port pins using delay functions check if its working
Then u can try in timer mode by configuring registers or i think u can use PWM too

 

[jpanhalt]

As mentioned, you can use delay functions to give you 1 mS to 2 mS (1.5 mS center) pulses for the full range of movement. However, not all servos are capable of 180° rotation. Those that are not capable of that degree of rotation can sometimes be modified. Some, unfortunately, cannot be modified.

So, before before allowing your servo stall at ±45 to 60° for a prolonged period, be sure to check whether it is capable of ±90° rotation.

Here's an informative link on that subject: **broken link removed**

The home site also has informative links on how servos work.

John