STM32f103 —— timer

#ifndef _TIMER_H_

#define _TIMER_H_

#include "stm32f10x.h"

#include "type.h"

// LED定时器，按键定时器，重发定时器

#define LED_TIMER           TIM1

#define LED_TIMER_DIV       7200

#define LED_TIMER_PERIOD    2500

#define PWM_TIMER           TIM2

#define RESEND_TIMER        TIM3

#define RESEND_TIMER_DIV    7200  

#define RESEND_TIMER_PERIOD 2500

#define KEY_TIMER           TIM4

#define KEY_TIMER_DIV       7200

#define KEY_TIMER_PERIOD    200

void TimerNvicConfig(void);

void TimerConfig(TIM_TypeDef *timer, uint16_t div, uint16_t period);

void TimerEnable(TIM_TypeDef *timer);

void TimerDisable(TIM_TypeDef *timer);

#endif /* _TIMER_H_ */

#include "stm32f10x_tim.h"

#include "stm32f10x_rcc.h"

#include "timer.h"

/*

*  三个定时器: 1 灯色   2 按键  3 重发

*/

void TimerNvicConfig(void)

{

  NVIC_InitTypeDef NVIC_StructInit;

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

  NVIC_StructInit.NVIC_IRQChannel = TIM1_UP_IRQn;

  NVIC_StructInit.NVIC_IRQChannelCmd = ENABLE;

  NVIC_StructInit.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_StructInit.NVIC_IRQChannelSubPriority = 1;

  NVIC_Init(&NVIC_StructInit);

  NVIC_StructInit.NVIC_IRQChannel = TIM2_IRQn;

  NVIC_StructInit.NVIC_IRQChannelCmd = ENABLE;

  NVIC_StructInit.NVIC_IRQChannelPreemptionPriority = 1;

  NVIC_StructInit.NVIC_IRQChannelSubPriority = 1;

  NVIC_Init(&NVIC_StructInit);

  NVIC_StructInit.NVIC_IRQChannel = TIM3_IRQn;

  NVIC_StructInit.NVIC_IRQChannelCmd = ENABLE;

  NVIC_StructInit.NVIC_IRQChannelPreemptionPriority = 2;

  NVIC_StructInit.NVIC_IRQChannelSubPriority = 1;

  NVIC_Init(&NVIC_StructInit);

  NVIC_StructInit.NVIC_IRQChannel = TIM4_IRQn;

  NVIC_StructInit.NVIC_IRQChannelCmd = ENABLE;

  NVIC_StructInit.NVIC_IRQChannelPreemptionPriority = 3;

  NVIC_StructInit.NVIC_IRQChannelSubPriority = 1;

  NVIC_Init(&NVIC_StructInit);

}

void TimerConfig(TIM_TypeDef *timer, uint16_t div, uint16_t period)

{

  TIM_TimeBaseInitTypeDef TIM_StructInit;

  if(LED_TIMER == timer)

  {

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

  }

  else if(RESEND_TIMER == timer)

  {

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

  }

  else if(KEY_TIMER == timer)

  {

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);

  }

  TIM_StructInit.TIM_Period = period;

  TIM_StructInit.TIM_Prescaler = div;

  TIM_StructInit.TIM_ClockDivision = TIM_CKD_DIV1; /* 数字滤波器采样频率 */

  TIM_StructInit.TIM_CounterMode = TIM_CounterMode_Up; /* 向上计数 */

  TIM_StructInit.TIM_RepetitionCounter = 0;

  TIM_TimeBaseInit(timer, &TIM_StructInit);

  TIM_ITConfig(timer, TIM_IT_Update, ENABLE); /* 允许中断 */

  TIM_ClearFlag(timer, TIM_FLAG_Update); /* 更新定时器会产生更新时间,清除标志位 */

}

void TimerEnable(TIM_TypeDef *timer)

{

  TIM_Cmd(timer, ENABLE);

}

void TimerDisable(TIM_TypeDef *timer)

{

  TIM_Cmd(timer, DISABLE);

}