1.STM32之定时器TIM---第一部分（基本定时器）（功能最强大结构最复杂的一个外设）（实验基本定时功能）-----定时器定时中断（利用内部时钟72M）

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NVICNVIC_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）