在V3.3库中，为什么EXTI_DeInit将挂起寄存器位置1？？？？？？？？？？
/**
* @brief Deinitializes the EXTI peripheral registers to their default reset values.
* @param 无
* @retval 无
*/
void EXTI_DeInit(void)
{
EXTI->IMR = 0x00000000;
EXTI->EMR = 0x00000000;
EXTI->RTSR = 0x00000000;
EXTI->FTSR = 0x00000000;
EXTI->PR = 0x000FFFFF; //这里为什么置1啊？？？？？？？？？？
} |
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