STM32f103 —— timer

#ifndef _TIMER_H_
#define _TIMER_H_

#include "stm32f10x.h"
#include "type.h"

// LED定時器，按鍵定時器，重發定時器
#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"

/*
*  三個定時器: 1 燈色   2 按鍵  3 重發
*/
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; /* 數字濾波器采樣頻率 */
  TIM_StructInit.TIM_CounterMode = TIM_CounterMode_Up; /* 向上計數 */
  TIM_StructInit.TIM_RepetitionCounter = 0;

  TIM_TimeBaseInit(timer, &TIM_StructInit);
  TIM_ITConfig(timer, TIM_IT_Update, ENABLE); /* 允許中斷 */
  TIM_ClearFlag(timer, TIM_FLAG_Update); /* 更新定時器會産生更新時間,清除标志位 */
}

void TimerEnable(TIM_TypeDef *timer)
{
  TIM_Cmd(timer, ENABLE);
}

void TimerDisable(TIM_TypeDef *timer)
{
  TIM_Cmd(timer, DISABLE);
}