ctc.c~

基于ATmega16的CTC PWM的一段小程序。

/*****************************************************

Chip type               : ATmega16
Program type            : Application
AVR Core Clock frequency: 4.000000 MHz
Memory model            : Small
External RAM size       : 0
Data Stack size         : 256
*****************************************************/

#include <mega16.h>
#include "delay.h"

// Timer 0 output compare interrupt service routine
interrupt [TIM0_COMP] void timer0_comp_isr(void)
{
// Place your code here
    //OCR0=0xaa;   
    
}

// Declare your global variables here

void main(void)
{
// Declare your local variables here


PORTB=0x00;
DDRB=0x0F;

TCCR0=0x1b;    //00011000   com01
TCNT0=0x00;
OCR0=0xfd;

ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x02;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;
PORTB=0x0f;
delay_ms(1000);
delay_ms(1000);
// Global enable interrupts

PORTB=0x0f;
delay_ms(1000);
delay_ms(1000);delay_ms(1000);delay_ms(1000);
delay_ms(1000);delay_ms(1000);
delay_ms(1000);delay_ms(1000);
delay_ms(1000); #asm("sei")
while (1)
      {
      };
}