STM32之NVIC学习

NVIC_InitTypeDef NVIC_InitStructure;

/* Configure the NVIC Preemption Priority Bits */

/* Configure one bit for preemption priority */

/*优先级组说明了抢占优先级所用的位数，和子优先级所用的位数在这里是1，7 */

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

/* Enable the USART1 Interrupt */

NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn; //设置串口5中断

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级0

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级为0

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能

NVIC_Init(&NVIC_InitStructure);

其中IRQChannel在stm32f2xx.h中查找。UART5_IRQn为UART5中断通道。