ATTINY13A的看门狗代码

TIMSK0=0x04;
// Analog Comparator initialization
// Analog Comparator: Off
ACSR=0x80;
ADCSRB=0x00;
// Global enable interrupts
#asm("sei")
while (1)
// INT0: On
// INT0 Mode: Rising Edge
// Interrupt on any change on pins PCINT0-5: Off
GIMSK=0x40;
MCUCR=0x03;
GIFR=0x40;
// Timer/Counter 0 Interrupt(s) initialization
}
// Timer 0 output compare A interrupt service routine
interrupt [TIM0_COMPA] void timer0_compa_isr(void)
{
// Place your code here
//启动看门狗控制输出脚，不是接到被监视芯片的RESET脚复位，而是给主芯片断电，PB3控制继电器输出！
{
// Place your code here
};
}
PORTB=0x00;
DDRB=0x08; //PB3输出
Hale Waihona Puke // Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: 0.500 kHz
// Mode: Normal top=FFh
Memory model : Tiny
External RAM size : 0
Data Stack size : 16
*****************************************************/
#include <tiny13a.h>
MCUSR=0;
// Place your code here
}
else if (MCUSR & 2)
{
// External Reset
MCUSR=0;
// Place your code here
}
else if (MCUSR & 4)
// External Interrupt 0 service routine
interrupt [EXT_INT0] void ext_int0_isr(void)
{
// Place your code here
TCNT0 = 0; //清除TIMER0计数，防止比较中断发生
{
// Brown-Out Reset
MCUSR=0;
// Place your code here
}
else
{
// Watchdog Reset
MCUSR=0;
// Place your code here
};
// OC0A output: Disconnected
// OC0B output: Disconnected
TCCR0A=0x00;
TCCR0B=0x01;
TCNT0=0x00;
OCR0A=0x1E; //30次，每次2毫秒，超过60毫秒发生比较中断
OCR0B=0x00;
// External Interrupt(s) initialization
// Input/Output Ports initialization
// Port B initialization
// Func5=In Func4=In Func3=OUT Func2=In Func1=In Func0=In
// State5=T State4=T State3=T State2=T State1=T State0=T
PORTB |= 0X08;
}
// Declare your global variables here
void main(void)
{
// Declare your local variables here
// Crystal Oscillator division factor: 256

Project :
Version :
Date : 2012-3-2
Author : NeVaDa
Company : a
Comments:
Chip type : ATtiny13A
AVR Core Clock frequency: 0.000500 MHz
#pragma optsize-
CLKPR=0x80;
CLKPR=0x08;
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif
// Reset Source checking
if (MCUSR & 1)
{
// Power-on Reset
/*****************************************************
This program was produced by the
CodeWizardAVR V2.04.4a Advanced
Automatic Program Generator
Copyright 1998-2009 Pavel Haiduc, HP InfoTech s.r.l.