我使用demo中的例子，注释掉了按键

void?IWDG_Feed_Init(?u16?prer,?u16?rlr?)
{
????IWDG_WriteAccessCmd(?IWDG_WriteAccess_Enable?);
????IWDG_SetPrescaler(?prer?);
????IWDG_SetReload(?rlr?);
????IWDG_ReloadCounter();
????IWDG_Enable();
}

/*********************************************************************
?*?@fn??????main
?*
?*?@brief???Main?program.
?*
?*?@return??none
?*/
int?main(?void?)
{
????SystemCoreClockUpdate();
????USART_Printf_Init(?115200?);
????printf(?"SystemClk:%d\r\n",?SystemCoreClock?);
????printf(?"ChipID:%08x\r\n",?DBGMCU_GetCHIPID()?);

????Delay_Init();
????KEY_Init();
????printf(?"IWDG?test...\r\n"?);
????Delay_Ms(?1000?);

????IWDG_Feed_Init(?IWDG_Prescaler_32,?4000?);???//?3.2s?IWDG?reset

????while(?1?)
????{
//????????if(?KEY_PRESS()?==?1?)????//PA0
????????{
?????????????Delay_Ms(?100?);
????????????printf(?"Feed?dog\r\n"?);
????????????IWDG_ReloadCounter();????//Feed?dog
????????????Delay_Ms(?10?);
????????}
????}
}

我注释掉了按键，按道理来说他一直在循环喂狗，不应该重启，可实际他是?每个3.2S就重启，如下??在初始化看门狗就死机了，程序都运行不到打印喂狗

[00:13:42.930]收←◆SystemClk:96000000
ChipID:20700418
IWDG test...

[00:13:47.301]收←◆SystemClk:96000000
ChipID:20700418
IWDG test...

[00:13:51.672]收←◆SystemClk:96000000
ChipID:20700418
IWDG test...

[00:13:56.045]收←◆SystemClk:96000000
ChipID:20700418
IWDG test...

您好，我这边测试是没有问题的，如下图。你可以检查一下你的硬件供电是否稳定，后续若有问题，可邮箱（lzs@wch.cn）沟通。