/*MAIN.C*/

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "misc.h"

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void NVIC_Configuration(void);
void GPIO_Configuration(void);
void TIM3_Configuration(void);

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program
  * @param  None
  * @retval : None
  */
int main(void)
{
 RCC_Configuration();
 NVIC_Configuration();
 GPIO_Configuration();
 TIM3_Configuration();

 TIM_ClearFlag(TIM3, TIM_FLAG_Update);/*清除更新标志位*/
 TIM_ARRPreloadConfig(TIM3, DISABLE);/*预装载寄存器的内容被立即传送到影子寄存器 */

 TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);    
 TIM_Cmd(TIM3, ENABLE);
 
 while (1) {
  ;
 }
}
/**
  * @brief  Configures TIM3
  * @param  None
  * @retval : None
  */
void TIM3_Configuration(void)
{

/*每1秒发生一次更新事件(进入中断服务程序)。RCC_Configuration()的SystemInit()的RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV2表明TIM3CLK为72MHz。因此，每次进入中断服务程序间隔时间为((1+TIM_Prescaler )/72M)*(1+TIM_Period )=((1+7199)/72M)*(1+9999)=1秒 */

 TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
 TIM_TimeBaseStructure.TIM_Period = 7199; 
 TIM_TimeBaseStructure.TIM_Prescaler = 9999;
 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
 TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);/*此函数的语句"TIMx->EGR = TIM_PSCReloadMode_Immediate;"以软件方式产生更新事件(注:当发生一个更新事件时，所有的寄存器都被更新，硬件同时(依据URS位)设置更新标志位(TIMx_SR寄存器中的UIF位)。)。*/
}
/**
  * @brief  Configures the different system clocks.
  * @param  None
  * @retval : None
  */
void RCC_Configuration(void)
{
 SystemInit();
  
 /* TIM3 clock enable */
 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
 
 /* GPIOC clock enable */
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

}
/**
  * @brief  Configures NVIC.
  * @param  None
  * @retval : None
*/
void NVIC_Configuration(void)
{
 NVIC_InitTypeDef NVIC_InitStructure;
 
 /* Enable the TIM3 gloabal Interrupt*/
 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);
}
/**
  * @brief  Configure the TIM3 Ouput Channels.
  * @param  None
  * @retval : None
  */
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);

/*注:不用为实现通用定时器的基本定时器功能配置Pin*/
}

/*stm32f10x_it.c*/

/* Includes ------------------------------------------------------------------*/

#include "stm32f10x_it.h"

 void TIM3_IRQHandler(void)
{
 if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) {
  /* Clear TIM3 update interrupt */
  TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
  GPIO_WriteBit(GPIOC, GPIO_Pin_7, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_7)));
 }
}

/*注:stm32f10x_stdperiph_lib_v3.0.0  编译器：MDK3.24A*/

/*软件仿真:首次进入中断Sec为1.00016507,第二次进入中断Sec为2.00016507，因此2.00016507-1.00016507=1*/

/*

*/

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