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#include "SWM221.h"
int main(void)
{
SystemInit();
GPIO_Init(GPIOA, PIN5, 1, 0, 0, 0); //输出，接LED
GPIO_Init(GPIOA, PIN2, 0, 1, 0, 0); //输入，上拉使能，接KEY
EXTI_Init(GPIOA, PIN2, EXTI_FALL_EDGE); //下降沿触发中断
NVIC_EnableIRQ(GPIOA2_GPIOC2_MPU_IRQn);
EXTI_Open(GPIOA, PIN2);
while(1==1)
}
void GPIOA2_GPIOC2_MPU_Handler(void)
EXTI_Clear(GPIOA, PIN2);
GPIO_InvBit(GPIOA, PIN5);