stm32 學習筆記3--中斷

1、Stm32學習筆記3—外部中斷1、外部中斷程序編寫方法①時鐘（RCC）初始化②IO端口初始化③EXTI配置，在這里配置需要選擇哪個引腳作為中斷引腳④NVIC配置，這也是比單片機多出來的部分，我們必須把NVIC中對應的通道使能，并且設置優(yōu)先級別⑤編寫中斷處理程序2、EXTI配置voidexti_config()EXTI_InitTypeDefEXTI_InitStructureGPIO_EXTILineConfig(GPIO_PtSour

2、ceGPIOAGPIO_PinSource0)設置PA0作為中斷線路EXTI_ClearITPendingBit(EXTI_Line0)EXTI_InitStructure.EXTI_Line=EXTI_Line0設置外部中斷線0EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt設置線路為中斷請求EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Fal

3、ling下降沿觸發(fā)EXTI_InitStructure.EXTI_LineCmd=ENABLE線路使能EXTI_Init(初始化中斷①EXTI_InitTypeDef結構體結構體EXTI_InitTypeDef定義于文件“stm32f10x_exti.h”：typedefstructu32EXTI_LineEXTIMode_TypeDefEXTI_ModeEXTIrigger_TypeDefEXTI_TriggerFunctionalS

4、tateEXTI_LineCmdEXTI_InitTypeDef參數(shù)說明u8NVIC_IRQChannelu8NVIC_IRQChannelPreemptionPriityu8NVIC_IRQChannelSubPriityFunctionalStateNVIC_IRQChannelCmdNVIC_InitTypeDef參數(shù)說明：NVIC_IRQChannel用以使能或者失能指定的IRQ通道NVIC_IRQChannelNVIC_IRQ

5、Channel描述描述WWDG_IRQChannel看門狗中斷PVD_IRQChannelPVD(可編程電壓探測器)通過EXTI探測中斷TAMPER_IRQChannel篡改中斷（入侵檢測）RTC_IRQChannelRTC全局中斷FlashItf_IRQChannelFLASH全局中斷RCC_IRQChannelRCC全局中斷EXTI0_IRQChannelEXTI4_IRQChannel外部中斷線04DMAChannel1_IRQC

6、hannel—DMAChannel7_IRQChannelDMA通道1中斷DMA通道7中斷ADC_IRQChannelADC全局中斷USB_HP_CANTX_IRQChannelUSB高優(yōu)先級或者CAN發(fā)送中斷USB_LP_CAN_RX0_IRQChannelUSB低優(yōu)先級或者CAN接收0中斷CAN_RX1_IRQChannelCAN接收1中斷CAN_SCE_IRQChannelCANSCE中斷EXTI9_5_IRQChannel外部中

7、斷線95中斷TIM1_BRK_IRQChannelTIM1暫停中斷TIM1_UP_IRQChannelTIM1刷新中斷TIM1_TRG_COM_IRQChannelTIM1觸發(fā)和通訊中斷TIM1_CC_IRQChannelTIM1捕獲比較中斷TIM2_IRQChannel—TIM4_IRQChannelTIM2全局中斷TIM4全局中斷I2C1_EV_IRQChannelI2C1事件中斷I2C1_ER_IRQChannelI2C1錯誤中斷

8、I2C2_EV_IRQChannelI2C2事件中斷I2C2_ER_IRQChannelI2C2錯誤中斷SPI1_IRQChannelSPI2_IRQChannelSPI1全局中斷—SPI2全局中斷USART1_IRQChannel—USART3_IRQChannelUSART1全局中斷—USART3全局中斷EXTI15_10_IRQChannel外部中斷線1510中斷RTCAlarm_IRQChannelRTC鬧鐘通過EXTI線中斷U