stm32有很多定时器，每种定时器的功能也不尽相同，今天学习了如何用通用定时器实现1s延时，使LED灯闪烁，现总结如下：

步骤总结：

使能定时器时钟->配置定时器结构体->清空定时器标志位->开启定时器中断->使能定时器->编写中断服务函数

Timer.c:

#include "Timer.h"void TimerBase_Config(void)
{//开时钟RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);//定义结构体变量TIM_TimeBaseInitTypeDef TimerBaseInitStructure;NVIC_InitTypeDef NVICInitStructure;//配置定时器结构体TimerBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;TimerBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;TimerBaseInitStructure.TIM_Period = 10000;TimerBaseInitStructure.TIM_Prescaler = 7200;TIM_TimeBaseInit(TIM2, &TimerBaseInitStructure);//清空标志位TIM_ClearFlag(TIM2,TIM_FLAG_Update);//开启定时器中断TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);//使能定时器TIM_Cmd(TIM2,ENABLE);//配置NVIC结构体NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);NVICInitStructure.NVIC_IRQChannel = TIM2_IRQn;NVICInitStructure.NVIC_IRQChannelCmd = ENABLE;NVICInitStructure.NVIC_IRQChannelPreemptionPriority = 1;NVICInitStructure.NVIC_IRQChannelSubPriority = 1;NVIC_Init(&NVICInitStructure);
}

stm32f103x_it.c:

void TIM2_IRQHandler(void)
{static uint16_t temp;if(TIM_GetITStatus(TIM2,TIM_IT_Update) != RESET){if(temp ++ %2 == 1){GPIO_ResetBits(LED_G_GPIO_PORT,LED_G_GPIO_PIN);}else {GPIO_SetBits(LED_G_GPIO_PORT,LED_G_GPIO_PIN);}}TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
}

main.c:

#include "stm32f10x.h"
#include "led.h"
#include "Timer.h"int main(void)
{TimerBase_Config();LED_GPIO_Confing();GPIO_SetBits(LED_G_GPIO_PORT,LED_G_GPIO_PIN);while(1){}
}

注意事项：

一定要记得清空标志位，尤其是中断服务函数里的清空标志位，博主就因为此检查好长时间