app.c

AVR Devolpment Board

#include "avr/io.h"
/* FCPU : 1Mhz
 * CPU  : ATMega16 */


void TimerConfig(void)
{
	/* WGM[1;0]=[1,1] : Fast PWM
	 * COM[1;0]=[1,1] : Set OC0 on compare match, clear OC0 at BOTTOM
	 * CS0[2:0]=[1,0,1] : Clock=FCPU/1024 (From prescaler) */
	TCCR0=(1<<WGM00)|(1<<WGM01)|(1<<COM01)|(1<<COM00)|(1<<CS02)|(0<<CS01)|(1<<CS00);

	/* Set the value of Timer/Counter Register to 0 */
	TCNT0= 0x00;

	/* Set the value of Output Compare Register to half of the top(255) value */
	OCR0 = 127;
}


int main(void)
{
	/* Set LED and Seg LE pin as output , databus as output */
	DDRA |=(1<<PA4)|(1<<PA5)|(1<<PA6); 
	DDRB  = 0xFF;

	/* Off the Seg display */
	PORTB = 0x00;
	PORTA|=  (1<<PA4)|(1<<PA5);
	PORTA&=~((1<<PA6)|(1<<PA5));

	/* Off the led and enable the Led LE */
	PORTB = 0xFF;
	PORTA|= (1<<PA6);

	TimerConfig();
	while(1)
	{
		;
	}
	return 0;
}