control servo (PWM) with atmega8535

My friend ask me to help in her final project which need a motor with a very slow velocity (1cm/hour) . Can you imagine that ?

As far as I know, the best solution is Servo. We can control the speed with PWM (Pulse Width Modulation), and of course as my favourite microcotroller ATMega8535 will do that control.  it`s only need two line addprogram in codevision AVR.

and it`s really work.

I love it…I love it…..I love it

this is the program

/*****************************************************
#include <mega8535.h>
#include <delay.h>

void main(void)
{
// Port A initialization
DDRA=0xFF;

// Port B initialization
DDRB=0xFF;

// Port D initialization
DDRD=0×20;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: 1500.000 kHz
// Mode: Ph. & fr. cor. PWM top=ICR1
// OC1A output: Non-Inv.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0×80;
TCCR1B=0×12;
TCNT1H=0×00;
TCNT1L=0×00;
ICR1H=0x3A;
ICR1L=0×98;
OCR1A=1000;
OCR1BH=0×00;
OCR1BL=0×00;
while (1)
{
for(OCR1A=600;OCR1A!=1500;OCR1A++){
delay_ms(7100);}
};
}

This program will control the servo in speed 1cm/hour
It`s WORKS! try this one(its fun, u need to wait 2hours to make sure the distance..ha…ha..)