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STM32中的定时器有很多用法：

（

一）系统时钟(SysTick)

设置非常简单，以下是产生1ms中断的设置，和产生10ms延时的函数：

void RCC_Configuration(void)
{
RCC_ClocksTypeDef RCC_ClockFreq;
SystemInit();//源自system_stm32f10x.c文件,只需要调用此函数,则可完成RCC的配置.
RCC_GetClocksFreq(&RCC_ClockFreq);——回复可见内容——

TIM_TimeBaseStructure.TIM_Prescaler = 35999;//分频35999 72M/

(35999+1)/2=1Hz 1秒中断溢出一次

TIM_TimeBaseStructure.TIM_Period = 2000; //计数值2000

((1+TIM_Prescaler )/72M)*(1+TIM_Period )=((1+35999)/72M)*(1+2000)=1秒*/

STM32通用定时器的基本定时器功能实现灯闪烁

#include "stm32f10x.h"
#include "misc.h"

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

int main(void)
{
RCC_Configuration();
NVIC_Configuration();
GPIO_Configuration();
TIM3_Configuration();

TIM_ClearFlag(TIM3, TIM_FLAG_Update);
TIM_ARRPreloadConfig(TIM3, DISABLE);

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

while (1) {
;
}
}

void TIM3_Configuration(void)
{

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_Period = 9999;
TIM_TimeBaseStructure.TIM_Prescaler = 7199;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
}

void RCC_Configuration(void)
{
SystemInit();


RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);


RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

}

void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;


NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);

}

#include "stm32f10x_it.h"

void TIM3_IRQHandler(void)
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) {

TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
GPIO_WriteBit(GPIOC, GPIO_Pin_7, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_7)));
}

}