EXTI_InitStructure.EXTI_Line = EXTI_Line6; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; // 上升沿触发 EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure);
时间: 2024-04-04 17:35:17 浏览: 16
这段代码中主要是对外部中断进行配置,其中EXTI_Line6表示使用外部中断线6,EXTI_Mode_Interrupt表示使用中断模式,EXTI_Trigger_Rising表示选择上升沿触发方式,EXTI_LineCmd = ENABLE表示使能该外部中断线,最后通过EXTI_Init函数进行初始化配置。
相关问题
我需要细节代码并且下面这段代码有无问题 { EXTI_InitTypeDef EXTI_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; /* Enable GPIOA clock */ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE); /* Enable SYSCFG clock */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); /* Configure PI6 pin as input floating */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; GPIO_Init(GPIOD, &GPIO_InitStructure); /* Connect EXTI Line6 to PI6 pin */ SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOD, EXTI_PinSource6); /* Configure EXTI Line6 */ EXTI_InitStructure.EXTI_Line = EXTI_Line6; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); /* Enable and set EXTI Line6 Interrupt to the lowest priority */ NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } }
根据给出的代码,配置似乎没有问题。该代码是用于配置STM32的外部中断(EXTI)和相关的GPIO引脚。以下是对代码的详细说明:
1. 首先,使能GPIOD和SYSCFG的时钟。
2. 然后,配置GPIOD引脚6为输入悬空模式(GPIO_Mode_IN,GPIO_PuPd_NOPULL)。
3. 通过SYSCFG_EXTILineConfig函数将EXTI线路6连接到GPIOD引脚6。
4. 配置EXTI_Line6的外部中断模式为中断模式(EXTI_Mode_Interrupt),触发方式为下降沿触发(EXTI_Trigger_Falling)。
5. 启用EXTI_Line6的中断功能(ENABLE),并将配置应用到EXTI_InitStructure结构体。
6. 配置NVIC的中断通道为EXTI9_5_IRQn,并将中断优先级设置为最低优先级(0x00)。
7. 启用NVIC的EXTI9_5_IRQn中断通道(ENABLE),并将配置应用到NVIC_InitStructure结构体。
请注意,对于具体的问题或需求,您可能需要进一步调整代码。这段代码主要是用于配置外部中断和相关的GPIO引脚,以及中断优先级设置。如有其他问题或需要更多帮助,请提供更多详细信息。
STM32两个按键中断控制LED灯
以下是STM32两个按键中断控制LED灯的代码实现:
```c
#include "stm32f10x.h"
void LED_GPIO_Config(void);
void KEY_GPIO_Config(void);
void EXTI_Config(void);
void NVIC_Config(void);
int main(void)
{
LED_GPIO_Config();
KEY_GPIO_Config();
EXTI_Config();
NVIC_Config();
while (1)
{
// 等待中断
}
}
void LED_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void KEY_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
void EXTI_Config(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource5);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource6);
EXTI_InitStructure.EXTI_Line = EXTI_Line5 | EXTI_Line6;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}
void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
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);
}
void EXTI9_5_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line5) != RESET)
{
GPIO_WriteBit(GPIOB, GPIO_Pin_0, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOB, GPIO_Pin_0)));
EXTI_ClearITPendingBit(EXTI_Line5);
}
if (EXTI_GetITStatus(EXTI_Line6) != RESET)
{
GPIO_WriteBit(GPIOB, GPIO_Pin_1, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOB, GPIO_Pin_1)));
EXTI_ClearITPendingBit(EXTI_Line6);
}
}
```