定时器TIM是STM32外设中功能最强大结构最复杂的一个外设！Whappy

STM32F103C8T6总共由一个高级定时器3个通用定时器

#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "OLED.h"
#include "Timer.h"


uint16_t Num;

int main(void)
{
	OLED_Init();
	Timer_Init();
	OLED_ShowString(1, 4, "Hi,Boy!");
	OLED_ShowString(2, 1, "Num:");
	
	
	while (1)
	{
		OLED_ShowNum(2,5,Num,5);
	}
}




void TIM2_IRQHandler(void)
{
	if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)//检查一下中断标志位
	{
		//用户代码
		
		Num++;
		TIM_ClearITPendingBit(TIM2, TIM_IT_Update); //清除中断标志位
	}
}

#include "stm32f10x.h"                  // Device header


//定时器初始化
void Timer_Init(void)
{
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); //(1)开启TIM2的时钟
	TIM_InternalClockConfig(TIM2);//(2)开启系统内部时钟
	
	//(3)配置时基单元
	TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
	TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1 ;
	TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInitStructure.TIM_Period = 10000-1;
	TIM_TimeBaseInitStructure.TIM_Prescaler = 7200-1;
	TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;

	TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
	
	TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);//(4)使能更新中断
	
	//(5)配置NVIC
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	
	NVIC_InitTypeDef NVIC_InitStructure;
	NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;  //中断通道
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
	
	NVIC_Init(&NVIC_InitStructure);
	
	//(5)启动定时器
	TIM_Cmd(TIM2,ENABLE);
	
	
}


//定时器中断入口（在启动文件里找）
/*
void TIM2_IRQHandler(void)
{
	if(TIM_GetITStatus(TIM12,TIM_IT_Update) == SET)//检查一下中断标志位
	{
		//用户代码
		
		Num++;
		TIM_ClearITPendingBit(TIM2,TIM_IT_Update); //清除中断标志位
	}
}
*/

总结：配置一下最简单的内部时钟触发定时器计数，5步走，就可以完成配置（从代码中参考定时器中断基本结构图进行配置）