STM32f103 —— timer

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#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    200void 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);}
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