STM32定时器中断使LED灯闪烁

STM32定时器中断使LED灯闪烁 知识点：

Stm32共有11个定时器：

1.两个高级定时器：TIM1、TIM8-------------------------APB2 2.四个通用定时器：TIM2～TIM5-------------------------APB1 3.两个基本定时器：TIM6、TIM7-------------------------APB1 4.两个看门狗

5.一个系统嘀嗒定时器（SysTick） 主程序main.c:

#include \#include \#include \#include \#include \#include \#include \

void RCC_Configuration(void); void GPIO_Configuration(void); void TIM3_Configuration(void); void NVIC_Configuration(void);

int main() {

SystemInit();

RCC_Configuration(); GPIO_Configuration(); TIM3_Configuration(); NVIC_Configuration();

while(1); }

void RCC_Configuration(void) {

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE); }

void GPIO_Configuration(void) {

GPIO_InitTypeDef GPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); }

void TIM3_Configuration(void) {

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_ClearITPendingBit(TIM3, TIM_IT_Update);

TIM_TimeBaseStructure.TIM_Period = 2000;//频率：72MHz 72000000/36000=2000 TIM_TimeBaseStructure.TIM_Prescaler = 35999;//36000-1=35999 TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE ); TIM_Cmd(TIM3,ENABLE); }

void NVIC_Configuration(void)//配置中断优先级 {

NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); }

中断函数stm32f10x_it.c

#include \#include \#include \#include \

void TIM3_IRQHandler(void) {

TIM_ClearITPendingBit(TIM3, TIM_IT_Update);

if(GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_2)==Bit_RESET) {

GPIO_SetBits(GPIOA,GPIO_Pin_2); }else{

GPIO_ResetBits(GPIOA,GPIO_Pin_2); } }

中断函数声明头文件stm32f10x_it.h： #ifndef __STM32F10x_IT_H #define __STM32F10x_IT_H void NMIException(void);

void HardFaultException(void); void MemManageException(void); void BusFaultException(void); void UsageFaultException(void); void DebugMonitor(void); void SVCHandler(void); void PendSVC(void);

void SysTickHandler(void);

void WWDG_IRQHandler(void); void PVD_IRQHandler(void); void TAMPER_IRQHandler(void); void RTC_IRQHandler(void); void FLASH_IRQHandler(void); void RCC_IRQHandler(void); void EXTI0_IRQHandler(void); void EXTI1_IRQHandler(void); void EXTI2_IRQHandler(void); void EXTI3_IRQHandler(void); void EXTI4_IRQHandler(void);

void DMA1_Channel1_IRQHandler(void); void DMA1_Channel2_IRQHandler(void); void DMA1_Channel3_IRQHandler(void); void DMA1_Channel4_IRQHandler(void); void DMA1_Channel5_IRQHandler(void); void DMA1_Channel6_IRQHandler(void); void DMA1_Channel7_IRQHandler(void); void ADC1_2_IRQHandler(void);

void USB_HP_CAN_TX_IRQHandler(void); void USB_LP_CAN_RX0_IRQHandler(void); void CAN_RX1_IRQHandler(void); void CAN_SCE_IRQHandler(void);

void EXTI9_5_IRQHandler(void); void TIM1_BRK_IRQHandler(void); void TIM1_UP_IRQHandler(void);

void TIM1_TRG_COM_IRQHandler(void); void TIM1_CC_IRQHandler(void); void TIM2_IRQHandler(void); void TIM3_IRQHandler(void); void TIM4_IRQHandler(void); void I2C1_EV_IRQHandler(void); void I2C1_ER_IRQHandler(void); void I2C2_EV_IRQHandler(void); void I2C2_ER_IRQHandler(void); void SPI1_IRQHandler(void); void SPI2_IRQHandler(void); void USART1_IRQHandler(void); void USART2_IRQHandler(void); void USART3_IRQHandler(void); void EXTI15_10_IRQHandler(void); void RTCAlarm_IRQHandler(void); void USBWakeUp_IRQHandler(void); void TIM8_BRK_IRQHandler(void); void TIM8_UP_IRQHandler(void);

void TIM8_TRG_COM_IRQHandler(void); void TIM8_CC_IRQHandler(void); void ADC3_IRQHandler(void); void FSMC_IRQHandler(void); void SDIO_IRQHandler(void); void TIM5_IRQHandler(void); void SPI3_IRQHandler(void); void UART4_IRQHandler(void); void UART5_IRQHandler(void); void TIM6_IRQHandler(void); void TIM7_IRQHandler(void);

void DMA2_Channel1_IRQHandler(void); void DMA2_Channel2_IRQHandler(void); void DMA2_Channel3_IRQHandler(void); void DMA2_Channel4_5_IRQHandler(void);

#endif /* __STM32F10x_IT_H */

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