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/bsp/tkm32F499/Libraries/CMSIS_and_startup/
A Dsys.c45 u8 EXTOFFSET=(BITx%4)*4; in Ex_NVIC_Config() local
47 SYSCFG->EXTICR[BITx/4]&=~(0x000F<<EXTOFFSET);//清除原来设置！！！ in Ex_NVIC_Config()
48 SYSCFG->EXTICR[BITx/4]|=GPIOx<<EXTOFFSET; //EXTI.BITx映射到GPIOx.BITx in Ex_NVIC_Config()

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