EX12AVR ATmega8A TC2 normal mode

//EX12AVR ATmega8A TC2 normal mode//author：QI小米粥//data：2018.3.28#include#includevoid init_tc2(void)

{

DDRB |=BIT(3);//OCR2引脚设置为输出

DDRB |=BIT(0);

TCCR2 &=~BIT(6); //normal 选择

TCCR2 &=~BIT(3);

TCCR2 &=~BIT(5);//匹配反转

TCCR2 |=BIT(4);

TCCR2 |=0x07;//1024分频1024Hz

OCR2=0X40;//匹配值为周期的四分之一

ASSR &=~BIT(3);//不选异步时钟

TIMSK |=BIT(7);//匹配中断使能

TIMSK |=BIT(6);//溢出中断使能

SREG |=BIT(7);//开全局中断

}

#pragma interrupt_handler tc2_match:4

void tc2_match(void)

{

//PORTB ^=BIT(3);

}

#pragma interrupt_handler tc2_ov:5

void tc2_ov(void)

{

PORTB ^=BIT(0);

}

void main(void)

{

init_tc2();

}