#include "exti.h"
/**
* @brief 配置嵌套向量中断控制器NVIC
* @param 无
* @retval 无
*/
static void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
/* 配置PB8.9为中断源 */
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief 配置 PC13 为线中断口,并设置中断优先级
* @param 无
* @retval 无
*/
void EXTI_PB89_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
/* config the extiline(PC13) clock and AFIO clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO,ENABLE);
/* config the NVIC(PC13) */
NVIC_Configuration();
/* EXTI line gpio config(PC13) */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; // 上拉输入
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; // 上拉输入
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* EXTI line(PC13) mode config */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource8);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource9);
EXTI_InitStructure.EXTI_Line = EXTI_Line8;
EXTI_InitStructure.EXTI_Line = EXTI_Line9;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; //上升沿中断
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}
/*********************************************END OF FILE**********************/
这个是我外部中断的初始化程序,要以PB8和PB9为中断口,就是进不去,不知道为什么
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