STM32定时器中断使LED灯闪烁_用定时器控制led闪烁

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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 “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){ 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 “..includestm32f10x.h” #include “..includestm32f10x_it.h” #include “..includestm32f10x_gpio.h” #include “..includestm32f10x_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 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 */