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
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
举报
