Stm32定时器中断使LED灯闪烁

只看该作者 · 2016-10-10 12:58

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）

只看该作者 · 2016-10-10 12:59

复制

/*

*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);  

}

只看该作者 · 2016-10-10 13:00

中断函数stm32f10x_it.c

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#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);

  }

}

只看该作者 · 2016-10-10 13:01

中断函数声明头文件stm32f10x_it.h：

复制

#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 */



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