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1、异常类型
每个外设都已产生中断 异常就是中断,中断就是异常(如果没有特别指明) 中断类型 系统异常,体现在内核水平 外部中断,体现在外设水平 参考手册:系统异常 10个 外部中断 60个 2、NVIC简介 core_cm3.h 中断优先级寄存器 8Bit wide(arm) IP厂商可能会有裁减 misc.h void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup); void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct); void NVIC_SetVectorTable(uint32_t NVIC_VectTab, uint32_t Offset); void NVIC_SystemLPConfig(uint8_t LowPowerMode, FunctionalState NewState); void SysTick_CLKSourceConfig(uint32_t SysTick_CLKSource); 3、优先级的定义 NVIC_IPRx 比较顺序: 主优先级->子优先级->硬件中断编号 优先级分组:SCB_AIRCB寄存器控制 4、中断编程 4.1 NVIC的中断使能寄存器配置 __IO uint32_t ISER[8]; 4.2 misc.c void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup) { /* Check the parameters */ assert_param(IS_NVIC_PRIORITY_GROUP(NVIC_PriorityGroup)); /* Set the PRIGROUP[10:8] bits according to NVIC_PriorityGroup value */ SCB->AIRCR = AIRCR_VECTKEY_MASK | NVIC_PriorityGroup; } 4.3 misc.h 讲解结构体 typedef struct { //指定中断源,比如串口的发射中断、接受中断 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) */ //根据分组来配置 参考上面的优先级分组图片 例0组 对应 主优先级 0 子优先级 15 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 */ //子优先级 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 */ //中断的大门 相当于电源的总电闸 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; uint8_t NVIC_IRQChannel 的配置 stm32f10x.h #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 */ 使用函数将刚才的配置写入到寄存器中 misc.h void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct) { uint32_t tmppriority = 0x00, tmppre = 0x00, tmpsub = 0x0F; /* Check the parameters */ assert_param(IS_FUNCTIONAL_STATE(NVIC_InitStruct->NVIC_IRQChannelCmd)); assert_param(IS_NVIC_PREEMPTION_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority)); assert_param(IS_NVIC_SUB_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelSubPriority)); if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE) { /* Compute the Corresponding IRQ Priority --------------------------------*/ tmppriority = (0x700 - ((SCB->AIRCR) & (uint32_t)0x700))>> 0x08; tmppre = (0x4 - tmppriority); tmpsub = tmpsub >> tmppriority; tmppriority = (uint32_t)NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << tmppre; tmppriority |= NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub; tmppriority = tmppriority << 0x04; NVIC->IP[NVIC_InitStruct->NVIC_IRQChannel] = tmppriority; /* Enable the Selected IRQ Channels --------------------------------------*/ NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] = (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F); } else { /* Disable the Selected IRQ Channels -------------------------------------*/ NVIC->ICER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] = (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F); } } 4.4 函数名:和启动文件的名称相对应,对于弱定义的中断名称,写错后会执行中断向量表里面的(不会报错) where:为了方便管理都放在stm32f10x.h stm32f10x_it.h |
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