PIC16单片机看门狗的使用

2019-7-25 11:31

#include <htc.h>

__CONFIG(0xFF36);

#define u8 unsigned char
#define u16 unsigned int

#define CLRWDT() asm("clrwdt")

void delay(u16 ms)
{
int i,j;
for(i=0;i<ms;i++)
for(j=0;j<71;j++);
}

2019-7-25 11:32

void port_init()
{
TRISD=0x00;
PORTD=0xFF;
}

2019-7-25 11:32

void watch_init()
{
PSA=1; //分频器给看门狗

PS2=1; //1:64,18ms*64≈1156
PS1=1;
PS0=0;
}

2019-7-25 12:13

void main()
{
port_init();
watch_init();

PORTD=0x00;
delay(500);
PORTD=0xFF;

while(1)
{
CLRWDT();
PORTD=0xFE;
delay(200);
PORTD=0xFd;
delay(200);
PORTD=0xFb;
delay(200);
PORTD=0xF7;
delay(200);
PORTD=0xEF;
delay(200);
//CLRWDT(); //如果这句屏蔽后程序复位了,说明看门狗起作用了
PORTD=0xDF;
delay(200);
PORTD=0xBF;
delay(200);
PORTD=0x7F;
delay(200);
}

}

2019-9-9 14:56

感谢各位支持