PVD config：
PWR_PVDLevelConfig(PWR_PVDLevel_2V9); // 2.9V
PWR_PVDCmd(ENABLE);
NVIC:
// Enable the PVD Interrupt
NVIC_InitStructure.NVIC_IRQChannel = PVD_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
PVD IRQHandler：
void PVD_IRQHandler(void)
{
if (PWR_GetFlagStatus(PWR_FLAG_PVDO) == SET)
{
GPIO_SetBits(BAT_CTRL); // 电源低于2.9V接通外部电池
}
}
以上程序经过测试好象不起作用，不知是什么问题，还是PVD根本就不能用来从电源切换到电池供电，请高人们指点
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楼主
