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怎样去实现NVIC的中断使能寄存器配置呢

问答对人有帮助，内容完整，我也想知道答案 0 中断异常类型有哪几种？怎样去实现NVIC的中断使能寄存器配置呢？ 0
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答案对人有帮助，有参考价值 0 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

2021-12-14 15:21:26 评论举报洪欣意