00. 目录

01. 定时器中断相关API

1.1 TIM_InternalClockConfig

/*** @brief  Configures the TIMx internal Clock* @param  TIMx: where x can be  1, 2, 3, 4, 5, 8, 9, 12 or 15*         to select the TIM peripheral.* @retval None*/
void TIM_InternalClockConfig(TIM_TypeDef* TIMx)
功能:设置 TIMx 内部时钟
参数:TIMx：x 可以是 2，3 或者 4，来选择 TIM 外设    
返回值:无   

1.2 TIM_TimeBaseInit

/*** @brief  Initializes the TIMx Time Base Unit peripheral according to *         the specified parameters in the TIM_TimeBaseInitStruct.* @param  TIMx: where x can be 1 to 17 to select the TIM peripheral.* @param  TIM_TimeBaseInitStruct: pointer to a TIM_TimeBaseInitTypeDef*         structure that contains the configuration information for the *         specified TIM peripheral.* @retval None*/
void TIM_TimeBaseInit(TIM_TypeDef* TIMx, TIM_TimeBaseInitTypeDef* TIM_TimeBaseInitStruct)
功能:根据 TIM_TimeBaseInitStruct 中指定的参数初始化 TIMx 的时间基数单位
参数:TIMx：x 可以是 2，3 或者 4，来选择 TIM 外设TIMTimeBase_InitStruct：指向结构 TIM_TimeBaseInitTypeDef 的指针，包含了TIMx 时间基数单位的配置信息    
返回值:无       

1.3 TIM_TimeBaseInitTypeDef

/** * @brief  TIM Time Base Init structure definition* @note   This structure is used with all TIMx except for TIM6 and TIM7.    */typedef struct
{uint16_t TIM_Prescaler;         uint16_t TIM_CounterMode;       uint16_t TIM_Period;            uint16_t TIM_ClockDivision;    uint8_t TIM_RepetitionCounter;  
} TIM_TimeBaseInitTypeDef; TIM_PeriodTIM_Period 设置了在下一个更新事件装入活动的自动重装载寄存器周期的值。它的取值必须在0x0000和0xFFFF之间。
TIM_PrescalerTIM_Prescaler 设置了用来作为 TIMx 时钟频率除数的预分频值。它的取值必须在0x0000和0xFFFF之间。/** @defgroup TIM_Counter_Mode * @{*/
#define TIM_CounterMode_Up                 ((uint16_t)0x0000)
#define TIM_CounterMode_Down               ((uint16_t)0x0010)
#define TIM_CounterMode_CenterAligned1     ((uint16_t)0x0020)
#define TIM_CounterMode_CenterAligned2     ((uint16_t)0x0040)
#define TIM_CounterMode_CenterAligned3     ((uint16_t)0x0060)/** @defgroup TIM_Clock_Division_CKD * @{*/
#define TIM_CKD_DIV1                       ((uint16_t)0x0000)
#define TIM_CKD_DIV2                       ((uint16_t)0x0100)
#define TIM_CKD_DIV4                       ((uint16_t)0x0200)TIM_RepetitionCounter 只用在高级定时器中    

1.4 TIM_ClearFlag

/*** @brief  Clears the TIMx's pending flags.* @param  TIMx: where x can be 1 to 17 to select the TIM peripheral.* @param  TIM_FLAG: specifies the flag bit to clear.*   This parameter can be any combination of the following values:*     @arg TIM_FLAG_Update: TIM update Flag*     @arg TIM_FLAG_CC1: TIM Capture Compare 1 Flag*     @arg TIM_FLAG_CC2: TIM Capture Compare 2 Flag*     @arg TIM_FLAG_CC3: TIM Capture Compare 3 Flag*     @arg TIM_FLAG_CC4: TIM Capture Compare 4 Flag*     @arg TIM_FLAG_COM: TIM Commutation Flag*     @arg TIM_FLAG_Trigger: TIM Trigger Flag*     @arg TIM_FLAG_Break: TIM Break Flag*     @arg TIM_FLAG_CC1OF: TIM Capture Compare 1 overcapture Flag*     @arg TIM_FLAG_CC2OF: TIM Capture Compare 2 overcapture Flag*     @arg TIM_FLAG_CC3OF: TIM Capture Compare 3 overcapture Flag*     @arg TIM_FLAG_CC4OF: TIM Capture Compare 4 overcapture Flag* @note*   - TIM6 and TIM7 can have only one update flag. *   - TIM9, TIM12 and TIM15 can have only TIM_FLAG_Update, TIM_FLAG_CC1,*      TIM_FLAG_CC2 or TIM_FLAG_Trigger. *   - TIM10, TIM11, TIM13, TIM14, TIM16 and TIM17 can have TIM_FLAG_Update or TIM_FLAG_CC1.   *   - TIM_FLAG_Break is used only with TIM1, TIM8 and TIM15. *   - TIM_FLAG_COM is used only with TIM1, TIM8, TIM15, TIM16 and TIM17.   * @retval None*/
void TIM_ClearFlag(TIM_TypeDef* TIMx, uint16_t TIM_FLAG)
功能:清除 TIMx 的待处理标志位
参数:TIMx：x 可以是 2，3 或者 4，来选择 TIM 外设TIM_FLAG：待清除的 TIM 标志位   
返回值:无     

1.5 TIM_ITConfig

/*** @brief  Enables or disables the specified TIM interrupts.* @param  TIMx: where x can be 1 to 17 to select the TIMx peripheral.* @param  TIM_IT: specifies the TIM interrupts sources to be enabled or disabled.*   This parameter can be any combination of the following values:*     @arg TIM_IT_Update: TIM update Interrupt source*     @arg TIM_IT_CC1: TIM Capture Compare 1 Interrupt source*     @arg TIM_IT_CC2: TIM Capture Compare 2 Interrupt source*     @arg TIM_IT_CC3: TIM Capture Compare 3 Interrupt source*     @arg TIM_IT_CC4: TIM Capture Compare 4 Interrupt source*     @arg TIM_IT_COM: TIM Commutation Interrupt source*     @arg TIM_IT_Trigger: TIM Trigger Interrupt source*     @arg TIM_IT_Break: TIM Break Interrupt source* @note *   - TIM6 and TIM7 can only generate an update interrupt.*   - TIM9, TIM12 and TIM15 can have only TIM_IT_Update, TIM_IT_CC1,*      TIM_IT_CC2 or TIM_IT_Trigger. *   - TIM10, TIM11, TIM13, TIM14, TIM16 and TIM17 can have TIM_IT_Update or TIM_IT_CC1.   *   - TIM_IT_Break is used only with TIM1, TIM8 and TIM15. *   - TIM_IT_COM is used only with TIM1, TIM8, TIM15, TIM16 and TIM17.    * @param  NewState: new state of the TIM interrupts.*   This parameter can be: ENABLE or DISABLE.* @retval None*/
void TIM_ITConfig(TIM_TypeDef* TIMx, uint16_t TIM_IT, FunctionalState NewState)
功能:使能或者失能指定的 TIM 中断
参数:TIMx：x 可以是 2，3 或者 4，来选择 TIM 外设TIM_IT：待使能或者失能的 TIM 中断源NewState：TIMx 中断的新状态    
返回值:无       

1.6 TIM_Cmd

/*** @brief  Enables or disables the specified TIM peripheral.* @param  TIMx: where x can be 1 to 17 to select the TIMx peripheral.* @param  NewState: new state of the TIMx peripheral.*   This parameter can be: ENABLE or DISABLE.* @retval None*/
void TIM_Cmd(TIM_TypeDef* TIMx, FunctionalState NewState)
功能:使能或者失能 TIMx 外设
参数:TIMx：x 可以是 2，3 或者 4，来选择 TIM 外设NewState: 外设 TIMx 的新状态   
返回值:无        

1.7 中断服务函数

参考程序

void TIM2_IRQHandler(void)
{if (TIM_GetITStatus(TIM2, TIM_IT_Update) == SET){Num ++;TIM_ClearITPendingBit(TIM2, TIM_IT_Update);}
}

1.8 TIM_ETRClockMode2Config

/*** @brief  Configures the External clock Mode2* @param  TIMx: where x can be  1, 2, 3, 4, 5 or 8 to select the TIM peripheral.* @param  TIM_ExtTRGPrescaler: The external Trigger Prescaler.*   This parameter can be one of the following values:*     @arg TIM_ExtTRGPSC_OFF: ETRP Prescaler OFF.*     @arg TIM_ExtTRGPSC_DIV2: ETRP frequency divided by 2.*     @arg TIM_ExtTRGPSC_DIV4: ETRP frequency divided by 4.*     @arg TIM_ExtTRGPSC_DIV8: ETRP frequency divided by 8.* @param  TIM_ExtTRGPolarity: The external Trigger Polarity.*   This parameter can be one of the following values:*     @arg TIM_ExtTRGPolarity_Inverted: active low or falling edge active.*     @arg TIM_ExtTRGPolarity_NonInverted: active high or rising edge active.* @param  ExtTRGFilter: External Trigger Filter.*   This parameter must be a value between 0x00 and 0x0F* @retval None*/
void TIM_ETRClockMode2Config(TIM_TypeDef* TIMx, uint16_t TIM_ExtTRGPrescaler, uint16_t TIM_ExtTRGPolarity, uint16_t ExtTRGFilter)
功能:配置TIMx外部时钟模式2 
参数:TIMx：x可以是2，3或者4，来选择TIM外设TIM_ExtTRGPrescaler：外部触发预分频TIM_ExtTRGPolarity：外部时钟极性    ExtTRGFilter：外部触发滤波器。该参数取值在0x0和0xF之间。        
返回值:无     

02. 定时器定时中断接线图

03. 定时器定时中断示例

timer.h

#ifndef __TIMER_H__
#define __TIMER_H__#include "stm32f10x.h"                  // Device headervoid timer_init(void);#endif

timer.c

#include "timer.h"void timer_init(void)
{TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;NVIC_InitTypeDef NVIC_InitStruct;//1. 开启时钟RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);//2. 开启定时器2内部时钟TIM_InternalClockConfig(TIM2);//3. 初始化定时器TIM_TimeBaseInitStruct.TIM_Period = 10000 - 1;TIM_TimeBaseInitStruct.TIM_Prescaler = 7200 - 1;TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0; //高级定时器使用TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStruct);//4. 清除中断标志TIM_ClearFlag(TIM2, TIM_FLAG_Update);//5. 使能中断TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);//6. 设置NVICNVIC_InitStruct.NVIC_IRQChannel = TIM2_IRQn;NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE ;NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 1;NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1;NVIC_Init(&NVIC_InitStruct);//7. 使能定时器TIM_Cmd(TIM2, ENABLE);
}

main.c

#include "stm32f10x.h"#include "delay.h"
#include "oled.h"
#include "timer.h"int16_t num;int main(void){		 //初始化OLED_Init();NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);timer_init();OLED_ShowString(1, 1, "num:");while (1){OLED_ShowNum(1, 5, num, 5);}return 0;}void TIM2_IRQHandler(void){if (TIM_GetITStatus(TIM2, TIM_IT_Update) == SET){num ++;TIM_ClearITPendingBit(TIM2, TIM_IT_Update);}}

04. 定时器外部时钟接线图

05. 定时器外部时钟示例

timer.h

#ifndef __TIMER_H__
#define __TIMER_H__#include "stm32f10x.h"                  // Device headervoid timer_init(void);#endif

timer.c

#include "timer.h"void timer_init(void)
{GPIO_InitTypeDef GPIO_InitStructure;TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;NVIC_InitTypeDef NVIC_InitStruct;//1. 开启时钟RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOA, &GPIO_InitStructure);//2. 配置TIMx外部时钟模式2 TIM_ETRClockMode2Config(TIM2, TIM_ExtTRGPSC_OFF, TIM_ExtTRGPolarity_NonInverted, 0xf);//3. 初始化定时器TIM_TimeBaseInitStruct.TIM_Period = 10 - 1;TIM_TimeBaseInitStruct.TIM_Prescaler = 1 - 1;TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0; //高级定时器使用TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStruct);//4. 清除中断标志TIM_ClearFlag(TIM2, TIM_FLAG_Update);//5. 使能中断TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);//6. 设置NVICNVIC_InitStruct.NVIC_IRQChannel = TIM2_IRQn;NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE ;NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 1;NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1;NVIC_Init(&NVIC_InitStruct);//7. 使能定时器TIM_Cmd(TIM2, ENABLE);
}

main.c

#include "stm32f10x.h"#include "delay.h"
#include "oled.h"
#include "timer.h"int16_t num;int main(void){		 //初始化OLED_Init();NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);timer_init();OLED_ShowString(1, 1, "num:");while (1){OLED_ShowNum(1, 5, num, 5);OLED_ShowNum(2, 5, TIM_GetCounter(TIM2), 5);}return 0;}void TIM2_IRQHandler(void){if (TIM_GetITStatus(TIM2, TIM_IT_Update) == SET){num ++;TIM_ClearITPendingBit(TIM2, TIM_IT_Update);}}

06. 程序下载

09-定时器定时中断.rar

10-定时器外部时钟.rar

07. 附录

参考: 【STM32】江科大STM32学习笔记汇总