void EXTI_Init (EXTI_InitTypeDef *EXTI_InitStruct)
时间: 2023-12-06 18:05:50 浏览: 83
EXTI_Init函数是用来初始化外部中断的。它接受一个指向EXTI_InitTypeDef结构体的指针作为参数,该结构体用于配置外部中断的相关参数。
在调用该函数之前,需要先创建一个EXTI_InitTypeDef类型的结构体变量,并对其成员进行适当的赋值。然后将该结构体变量的地址作为参数传递给EXTI_Init函数,即可完成外部中断的初始化。
请注意,由于你没有提供EXTI_InitTypeDef结构体的定义和具体的初始化参数,我无法给出具体的代码实现。如果你需要更详细的帮助,请提供相关的代码和问题背景。
相关问题
EXTI_InitStruct是什么
EXTI_InitStruct是一个结构体指针,用于配置外部中断的相关参数。这个结构体包含了多个成员,每个成员对应着外部中断的一项配置。
具体的EXTI_InitStruct结构体定义可能如下所示:
```c
typedef struct
{
uint32_t EXTI_Line; // 外部中断线路
uint32_t EXTI_Mode; // 中断触发模式
uint32_t EXTI_Trigger; // 中断触发方式
uint32_t EXTI_LineCmd; // 中断线路使能/失能
} EXTI_InitTypeDef;
```
这里的每个成员的含义如下:
- EXTI_Line:外部中断线路,用于指定哪个外部中断线路要配置。
- EXTI_Mode:中断触发模式,用于指定外部中断的触发模式,例如上升沿触发、下降沿触发等。
- EXTI_Trigger:中断触发方式,用于指定外部中断的触发方式,例如单次触发、连续触发等。
- EXTI_LineCmd:中断线路使能/失能,用于启用或禁用指定的外部中断线路。
通过对EXTI_InitStruct结构体成员的适当赋值,可以实现对外部中断的具体配置。然后将该结构体指针作为参数传递给EXTI_Init函数,即可完成外部中断的初始化。
在保持原来的代码逻辑的条件下,根据STM32F407的特性,把下面STM32F1的代码移植到STM32F407。void ExtiGpioInit(void) { GPIO_InitTypeDef GPIO_InitStruct; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE); GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5 ; GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOC, &GPIO_InitStruct); } void ExtiNvicInit(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn ; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } void ExtiModeInit(void) { EXTI_InitTypeDef EXTI_InitStructure; GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource4); EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_Line = EXTI_Line4; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource5); EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_Line = EXTI_Line5; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); }
void ExtiGpioInit(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5 ;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOC, &GPIO_InitStruct);
}
void ExtiNvicInit(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn ;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void ExtiModeInit(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOC, EXTI_PinSource4);
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_Line = EXTI_Line4;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOC, EXTI_PinSource5);
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_Line = EXTI_Line5;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}