STM32定时器配置

#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))); 

} 

}