新手窗口看门狗实验进不去看门狗，求解！！！

ai804483253 · 发表于 2019-9-26 21:38:02

主函数如下：
#include "stm32f10x.h"
#include "wwdg.h"
#include "led.h"
#include "delay.h"
//如果看门狗计数到0x40溢出，进入溢出中断，绿灯不断闪烁
//注释喂狗函数，系统不断初始化，红灯不断闪烁
int main()
{
delay_init();
led_init();
delay_ms(500);
led_red  = 0;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
wwdg_init();

while(1)
{
  led_red = 1;
}
}
看门狗初始化与看门狗中断函数如下：

#include "stm32f10x.h"
#include "wwdg.h"
#include "led.h"
#include "delay.h"
//窗口看门狗初始化函数
//Twwdg=(4096×2^WDGTB×(T[5:0]+1)) /Fpclk1;
//Twwdg超时时间；预分频系数；低六位计数器；
void wwdg_init()
{
NVIC_InitTypeDef NVIC_InitSTR;

//使能APB1时钟①
RCC_APB1PeriphResetCmd(RCC_APB1Periph_WWDG,ENABLE);

//设置预分频系数②
WWDG_SetPrescaler(WWDG_Prescaler_8);

//设置窗口上限0x5f
WWDG_SetWindowValue(0x5F);

//设置重装载值为最大值0x7f
//WWDG_SetCounter(0x7F);可在WWDG_Enable();中设置并开启看门狗

//开启看门狗并设置计数器为0x7F③
WWDG_Enable(0x7F);

//清除提前唤醒中断标志位⑤
WWDG_ClearFlag();

//初始化看门狗中断
NVIC_InitSTR.NVIC_IRQChannel                   = WWDG_IRQn;
NVIC_InitSTR.NVIC_IRQChannelPreemptionPriority  = 2;
NVIC_InitSTR.NVIC_IRQChannelSubPriority       = 3;
NVIC_InitSTR.NVIC_IRQChannelCmd                = ENABLE;
NVIC_Init(&NVIC_InitSTR);

  //打开看门狗中断⑥
WWDG_EnableIT();

//开启看门狗计数器并设置计数器为0x7F③
WWDG_Enable(0x7F);

}
中断函数如下：
void WWDG_IRQHandler()
{
WWDG_Enable(0x7F);
WWDG_ClearFlag();
led_green = !led_green;
}
实验逻辑是进入中断，绿灯不断闪烁。注释喂狗函数，程序不断刷新，红灯不断闪烁。
实际两个都没任何反应。
曾将中断中的求反改为led_green=0,实际一直未进入中断函数，求解！！！