大型门户网站后端,logo一键生成器免费版下载,欧盟理事会,清风网站建设00. 目录 文章目录 00. 目录01. 定时器中断相关API1.1 TIM_InternalClockConfig1.2 TIM_TimeBaseInit1.3 TIM_TimeBaseInitTypeDef1.4 TIM_ClearFlag1.5 TIM_ITConfig1.6 TIM_Cmd1.7 中断服务函数1.8 TIM_ETRClockMode2Config 02. 定时器定时中断接线图03. 定时器定时中断示例0…00. 目录 文章目录 00. 目录01. 定时器中断相关API1.1 TIM_InternalClockConfig1.2 TIM_TimeBaseInit1.3 TIM_TimeBaseInitTypeDef1.4 TIM_ClearFlag1.5 TIM_ITConfig1.6 TIM_Cmd1.7 中断服务函数1.8 TIM_ETRClockMode2Config 02. 定时器定时中断接线图03. 定时器定时中断示例04. 定时器外部时钟接线图05. 定时器外部时钟示例06. 程序下载07. 附录 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:TIMxx 可以是 23 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:TIMxx 可以是 23 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 TIMxs 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:TIMxx 可以是 23 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:TIMxx 可以是 23 或者 4来选择 TIM 外设TIM_IT待使能或者失能的 TIM 中断源NewStateTIMx 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:TIMxx 可以是 23 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:TIMxx可以是23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.hvoid 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.hint16_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.hvoid 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.hint16_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
