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:

/**说明：*PA0:KEY1;PA1:KEY2;*PA2:LED1;PA3:LED2;*PA9:USART1_TX;PA10:USART1_RX*/#include "stm32f10x.h"#include "stm32f10x_rcc.h"#include "stm32f10x_gpio.h"#include "stm32f10x_tim.h"#include "stm32f10x_exti.h"#include "system_stm32f10x.h"#include "misc.h"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)  {     ////USART2和USART3都在在APB1上而USART1是在APB2上的  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\stm32f10x.h" #include "..\include\stm32f10x_it.h"#include "..\include\stm32f10x_gpio.h"#include "..\include\stm32f10x_tim.h"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/* Includes ------------------------------------------------------------------*//* Exported types ------------------------------------------------------------*//* Exported constants --------------------------------------------------------*//* Exported macro ------------------------------------------------------------*//* Exported functions ------------------------------------------------------- */  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 *//******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/