STM32_外部中断
2016-04-22 21:46
387 查看
一般使用配置
选择中断优先级组
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_x);
以下是用到的宏定义。
#define NVIC_PriorityGroup_0 ((uint32_t)0x700) /*!< 0 bits for pre-emption priority 4 bits for subpriority */ #define NVIC_PriorityGroup_1 ((uint32_t)0x600) /*!< 1 bits for pre-emption priority 3 bits for subpriority */ #define NVIC_PriorityGroup_2 ((uint32_t)0x500) /*!< 2 bits for pre-emption priority 2 bits for subpriority */ #define NVIC_PriorityGroup_3 ((uint32_t)0x400) /*!< 3 bits for pre-emption priority 1 bits for subpriority */ #define NVIC_PriorityGroup_4 ((uint32_t)0x300) /*!< 4 bits for pre-emption priority 0 bits for subpriority */
关于中断优先级组的说明。
/** @code The table below gives the allowed values of the pre-emption priority and subpriority according to the Priority Grouping configuration performed by NVIC_PriorityGroupConfig function ============================================================================================================================ NVIC_PriorityGroup | NVIC_IRQChannelPreemptionPriority | NVIC_IRQChannelSubPriority | Description ============================================================================================================================ NVIC_PriorityGroup_0 | 0 | 0-15 | 0 bits for pre-emption priority | | | 4 bits for subpriority ---------------------------------------------------------------------------------------------------------------------------- NVIC_PriorityGroup_1 | 0-1 | 0-7 | 1 bits for pre-emption priority | | | 3 bits for subpriority ---------------------------------------------------------------------------------------------------------------------------- NVIC_PriorityGroup_2 | 0-3 | 0-3 | 2 bits for pre-emption priority | | | 2 bits for subpriority ---------------------------------------------------------------------------------------------------------------------------- NVIC_PriorityGroup_3 | 0-7 | 0-1 | 3 bits for pre-emption priority | | | 1 bits for subpriority ---------------------------------------------------------------------------------------------------------------------------- NVIC_PriorityGroup_4 | 0-15 | 0 | 4 bits for pre-emption priority | | | 0 bits for subpriority ============================================================================================================================ @endcode */
配置嵌套向量中断控制器NVIC
NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = x_x_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure);
下面是用到结构体和宏定义。
typedef struct
{
uint8_t NVIC_IRQChannel; /*!< Specifies the IRQ channel to be enabled or disabled.
This parameter can be a value of @ref IRQn_Type
(For the complete STM32 Devices IRQ Channels list, please
refer to stm32f10x.h file) */
uint8_t NVIC_IRQChannelPreemptionPriority; /*!< Specifies the pre-emption priority for the IRQ channel
specified in NVIC_IRQChannel. This parameter can be a value
between 0 and 15 as described in the table @ref NVIC_Priority_Table */
uint8_t NVIC_IRQChannelSubPriority; /*!< Specifies the subpriority level for the IRQ channel specified
in NVIC_IRQChannel. This parameter can be a value
between 0 and 15 as described in the table @ref NVIC_Priority_Table */
FunctionalState NVIC_IRQChannelCmd; /*!< Specifies whether the IRQ channel defined in NVIC_IRQChannel
will be enabled or disabled.
This parameter can be set either to ENABLE or DISABLE */
} NVIC_InitTypeDef;#ifdef STM32F10X_HD ADC1_2_IRQn = 18, /*!< ADC1 and ADC2 global Interrupt */ USB_HP_CAN1_TX_IRQn = 19, /*!< USB Device High Priority or CAN1 TX Interrupts */ USB_LP_CAN1_RX0_IRQn = 20, /*!< USB Device Low Priority or CAN1 RX0 Interrupts */ CAN1_RX1_IRQn = 21, /*!< CAN1 RX1 Interrupt */ CAN1_SCE_IRQn = 22, /*!< CAN1 SCE Interrupt */ EXTI9_5_IRQn = 23, /*!< External Line[9:5] Interrupts */ TIM1_BRK_IRQn = 24, /*!< TIM1 Break Interrupt */ TIM1_UP_IRQn = 25, /*!< TIM1 Update Interrupt */ TIM1_TRG_COM_IRQn = 26, /*!< TIM1 Trigger and Commutation Interrupt */ TIM1_CC_IRQn = 27, /*!< TIM1 Capture Compare Interrupt */ TIM2_IRQn = 28, /*!< TIM2 global Interrupt */ TIM3_IRQn = 29, /*!< TIM3 global Interrupt */ TIM4_IRQn = 30, /*!< TIM4 global Interrupt */ I2C1_EV_IRQn = 31, /*!< I2C1 Event Interrupt */ I2C1_ER_IRQn = 32, /*!< I2C1 Error Interrupt */ I2C2_EV_IRQn = 33, /*!< I2C2 Event Interrupt */ I2C2_ER_IRQn = 34, /*!< I2C2 Error Interrupt */ SPI1_IRQn = 35, /*!< SPI1 global Interrupt */ SPI2_IRQn = 36, /*!< SPI2 global Interrupt */ USART1_IRQn = 37, /*!< USART1 global Interrupt */ USART2_IRQn = 38, /*!< USART2 global Interrupt */ USART3_IRQn = 39, /*!< USART3 global Interrupt */ EXTI15_10_IRQn = 40, /*!< External Line[15:10] Interrupts */ RTCAlarm_IRQn = 41, /*!< RTC Alarm through EXTI Line Interrupt */ USBWakeUp_IRQn = 42, /*!< USB Device WakeUp from suspend through EXTI Line Interrupt */ TIM8_BRK_IRQn = 43, /*!< TIM8 Break Interrupt */ TIM8_UP_IRQn = 44, /*!< TIM8 Update Interrupt */ TIM8_TRG_COM_IRQn = 45, /*!< TIM8 Trigger and Commutation Interrupt */ TIM8_CC_IRQn = 46, /*!< TIM8 Capture Compare Interrupt */ ADC3_IRQn = 47, /*!< ADC3 global Interrupt */ FSMC_IRQn = 48, /*!< FSMC global Interrupt */ SDIO_IRQn = 49, /*!< SDIO global Interrupt */ TIM5_IRQn = 50, /*!< TIM5 global Interrupt */ SPI3_IRQn = 51, /*!< SPI3 global Interrupt */ UART4_IRQn = 52, /*!< UART4 global Interrupt */ UART5_IRQn = 53, /*!< UART5 global Interrupt */ TIM6_IRQn = 54, /*!< TIM6 global Interrupt */ TIM7_IRQn = 55, /*!< TIM7 global Interrupt */ DMA2_Channel1_IRQn = 56, /*!< DMA2 Channel 1 global Interrupt */ DMA2_Channel2_IRQn = 57, /*!< DMA2 Channel 2 global Interrupt */ DMA2_Channel3_IRQn = 58, /*!< DMA2 Channel 3 global Interrupt */ DMA2_Channel4_5_IRQn = 59 /*!< DMA2 Channel 4 and Channel 5 global Interrupt */ #endif /* STM32F10X_HD */
使能外部中断引脚时钟和复用IO时钟
RCC_APB2PeriphClockCmd( (RCC_APB2Periph_GPIOx | RCC_APB2Periph_AFIO), ENABLE);
配置外部中断引脚
GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_x; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //下拉输入 GPIO_Init(GPIOx, &GPIO_InitStructure);
配置外部中断
EXTI_InitTypeDef EXTI_InitStructure; EXTI_InitStructure.EXTI_Line = EXTI_Linexx; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; //下降沿触发 EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure);
下面是使用到的结构体和宏定义。
typedef struct
{
uint32_t EXTI_Line; /*!< Specifies the EXTI lines to be enabled or disabled.
This parameter can be any combination of @ref EXTI_Lines */
EXTIMode_TypeDef EXTI_Mode; /*!< Specifies the mode for the EXTI lines.
This parameter can be a value of @ref EXTIMode_TypeDef */
EXTITrigger_TypeDef EXTI_Trigger; /*!< Specifies the trigger signal active edge for the EXTI lines.
This parameter can be a value of @ref EXTIMode_TypeDef */
FunctionalState EXTI_LineCmd; /*!< Specifies the new state of the selected EXTI lines.
This parameter can be set either to ENABLE or DISABLE */
}EXTI_InitTypeDef;#define EXTI_Line0 ((uint32_t)0x00001) /*!< External interrupt line 0 */ #define EXTI_Line1 ((uint32_t)0x00002) /*!< External interrupt line 1 */ #define EXTI_Line2 ((uint32_t)0x00004) /*!< External interrupt line 2 */ #define EXTI_Line3 ((uint32_t)0x00008) /*!< External interrupt line 3 */ #define EXTI_Line4 ((uint32_t)0x00010) /*!< External interrupt line 4 */ #define EXTI_Line5 ((uint32_t)0x00020) /*!< External interrupt line 5 */ #define EXTI_Line6 ((uint32_t)0x00040) /*!< External interrupt line 6 */ #define EXTI_Line7 ((uint32_t)0x00080) /*!< External interrupt line 7 */ #define EXTI_Line8 ((uint32_t)0x00100) /*!< External interrupt line 8 */ #define EXTI_Line9 ((uint32_t)0x00200) /*!< External interrupt line 9 */ #define EXTI_Line10 ((uint32_t)0x00400) /*!< External interrupt line 10 */ #define EXTI_Line11 ((uint32_t)0x00800) /*!< External interrupt line 11 */ #define EXTI_Line12 ((uint32_t)0x01000) /*!< External interrupt line 12 */ #define EXTI_Line13 ((uint32_t)0x02000) /*!< External interrupt line 13 */ #define EXTI_Line14 ((uint32_t)0x04000) /*!< External interrupt line 14 */ #define EXTI_Line15 ((uint32_t)0x08000) /*!< External interrupt line 15 */ #define EXTI_Line16 ((uint32_t)0x10000) /*!< External interrupt line 16 Connected to the PVD Output */ #define EXTI_Line17 ((uint32_t)0x20000) /*!< External interrupt line 17 Connected to the RTC Alarm event */ #define EXTI_Line18 ((uint32_t)0x40000) /*!< External interrupt line 18 Connected to the USB Device/USB OTG FS Wakeup from suspend event */ #define EXTI_Line19 ((uint32_t)0x80000) /*!< External interrupt line 19 Connected to the Ethernet Wakeup event */
typedef enum
{
EXTI_Mode_Interrupt = 0x00, //中断请求
EXTI_Mode_Event = 0x04 //事件请求
}EXTIMode_TypeDef;typedef enum
{
EXTI_Trigger_Rising = 0x08, //上升沿触发
EXTI_Trigger_Falling = 0x0C, //下降沿触发
EXTI_Trigger_Rising_Falling = 0x10 //上升沿和下降沿均触发
}EXTITrigger_TypeDef;在stm32f10x_it.c中配置中断函数
void x_x_IRQHandler(){
//再次判断是否触发中断（进入中断函数已经是触发中断了）
if(EXTI_GetITStatus(EXTI_Linexx) != RESET){
/*--------do what--------*/
//清除中断标志位
EXTI_ClearITPendingBit(EXTI_Linexx);
}
}记得在stm32f10x_it.h中添加函数声明。
EXTI_GetITStatus()检查指定的EXTI线路触发请求发生与否；
EXTI_GetFlagStatus()检查指定的EXTI线路标志位的设置与否。
开关总中断
core_m3.c
/**
* @brief Set the Priority Mask value
*
* @param priMask PriMask
*
* Set the priority mask bit in the priority mask register
*/
__ASM void __set_PRIMASK(uint32_t priMask)
{
msr primask, r0
bx lr
}可以写成宏定义。
#define SEI() __set_PRIMASK(0); //开放总中断 #define CLI() __set_PRIMASK(1); //关闭总中断
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
相关文章推荐
- JDK的动态代理
- 0421--"数字口袋精灵app"二次开发（Blackbriar团队开发）
- 软考信息系统监理师：2016年4月22日作业
- （28）SpringBoot启动时的Banner设置【从零开始学Spring Boot】
- 关于TCP的问题总结
- OpenCV完美配置攻略
- 【vc++/office ocr引擎】图片文字识别
- Codeforces 552C. Vanya and Scales【巧】
- 站立会议第五天
- 团队项目个人每日总结（4.22）
- 典型用户分析
- Android - View的绘制流程二（layout）
- 【Raspberry Pi 3试用体验】+ 中文显示及输入+百度云传输
- Shell中创建序列和数组(list、array）的方法
- HDU 5671 矩阵的交换行、交换列，整行加一个数 思维题
- iOS基础：NSDate
- Android stadio
- iPhone4s刷机教程
- Android Studio2.0在Android5.0以下机型无法调试
- vb.net操作excel时，如何判断单元格内容为空