[mw_shl_code=c,true]#include "delay.h"
#include "led.h"
#include "wwdg.h"

int main(void)
{
       
        NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
        delay_init(168);
        LED_Init();
       
        LED0 = 0;
        delay_ms(300);
        WWDG_Init(0x7F,0x5F,WWDG_Prescaler_8);
        while(1)
        {
                LED1 = 1;
        }
}

#ifndef __WWDG_H_
#define __WWDG_H_
#include "sys.h"

void WWDG_Init(u8 tr, u8 wr, u32 fprer);

#endif

#include "wwdg.h"
#include "led.h"
#include "delay.h"
u8 WWDG_CNT=0x7F;

void WWDG_Init(u8 tr, u8 wr, u32 fprer)                //计数器值，上限窗口值，分频系数
{
        NVIC_InitTypeDef        NVIC_InitStructure;

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_WWDG,ENABLE);
       
        WWDG_CNT = tr&WWDG_CNT;
        WWDG_SetPrescaler(fprer);//        <0x7F
        WWDG_SetWindowValue(wr);
        WWDG_Enable(WWDG_CNT);
       
        NVIC_InitStructure.NVIC_IRQChannel = WWDG_IRQn;
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
       
        NVIC_Init(&NVIC_InitStructure);

        WWDG_ClearFlag();                //清除一下中断标志位
       
        WWDG_EnableIT();                //开启以前唤醒中断
}

void WWDG_IRQHandler(void)
{
        WWDG_SetCounter(WWDG_CNT);
        WWDG_ClearFlag();                //清除中断
//        LED0 = !LED0;
//        delay_ms(5);
        LED1 = !LED1;
//        delay_ms(5);
}


#ifndef __LED_H_
#define __LED_H_
#include "sys.h"

#define LED0 PFout(9)
#define LED1 PFout(10)

void LED_Init(void);

#endif


#include "led.h"

void LED_Init(void)
{
        GPIO_InitTypeDef        GPIO_InitStructure;
       
        RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE);
       
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_10;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
        GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
        GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
       
        GPIO_Init(GPIOF,&GPIO_InitStructure);
       
        GPIO_SetBits(GPIOF,GPIO_Pin_9|GPIO_Pin_10);

}



[/mw_shl_code]

liuliupiaoxue 发表于 2017-10-7 10:08
看起来是实验现象不对啊，你把main里的LED1=1搞错了吧，原程序是LED0=1

还说一模一样，估计看门狗启作用了，就是实验现象看不见了，

烟酒不沾 发表于 2017-10-7 11:00
还说一模一样，估计看门狗启作用了，就是实验现象看不见了，

看门狗起作用的话电平会翻转才对