stm32 tim tim_icselection_trc
时间: 2024-08-15 07:02:48 浏览: 40
STM32中的TIM (Timer) 模块是一个常用的定时器和计数器模块,用于各种时间相关的任务,比如PWM生成、测量时间间隔等。TIM_ICSelection_TRC (Timer Input Capture Selection and Trigger Control Register) 是该模块中的一个寄存器,主要用于配置输入捕获功能。
这个寄存器的作用包括以下几个方面:
1. **输入捕获选择**:决定了定时器是否通过通道接收外部信号作为触发事件。它可以设置为软件触发(Software trigger)、上升沿触发(Rising edge)、下降沿触发(Falling edge),或者是两个边缘触发(Both edges)。
2. **触发事件控制**:配置了外部输入信号到达特定位置时,定时器的行为。例如,如果设置成“边沿触发”,那么当信号从低电平变为高电平或者相反方向变化时,将启动定时器中断或者更新计数值。
3. **中断管理**:通过TIM_ICSelection_TRC可以关联每个输入捕获通道的中断请求,这对于需要基于外部事件响应的应用非常有用。
操作这个寄存器前,你需要先了解你的STM32型号所支持的具体TIM功能,并参考相应的数据手册,因为不同的系列和型号可能会有不同的详细配置选项。
相关问题
stm32TIM4ETR配置代码
以下是 STM32 TIM4 ETR 配置代码示例:
```
#include "stm32f4xx.h"
void TIM4_ETR_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable GPIO clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);
/* Enable TIM4 clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
/* Configure TIM4 ETR pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/* Connect TIM4 ETR pin to AF2 */
GPIO_PinAFConfig(GPIOE, GPIO_PinSource, GPIO_AF_TIM4);
/* Configure TIM4 time base */
TIM_TimeBaseStructure.TIM_Period = 65535;
TIM_TimeBaseStructure.TIM_Prescaler = ;
TIM_TimeBaseStructure.TIM_ClockDivision = ;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
/* Configure TIM4 input capture */
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_TRC;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter = ;
TIM_ICInit(TIM4, &TIM_ICInitStructure);
/* Enable TIM4 interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = ;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable TIM4 ETR */
TIM_SelectInputTrigger(TIM4, TIM_TS_ETRF);
TIM_ETRClockMode1Config(TIM4, TIM_ExtTRGPSC_OFF, TIM_ExtTRGPolarity_NonInverted, );
/* Enable TIM4 counter */
TIM_Cmd(TIM4, ENABLE);
}
```
stm32F103TIM4ETR配置代码
以下是 STM32F103TIM4ETR 的配置代码:
```
#include "stm32f10x.h"
void TIM4_ETR_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
TIM_TimeBaseStructure.TIM_Period = xFFFF;
TIM_TimeBaseStructure.TIM_Prescaler = ;
TIM_TimeBaseStructure.TIM_ClockDivision = ;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_TRC;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter = x;
TIM_ICInit(TIM4, &TIM_ICInitStructure);
TIM_SelectInputTrigger(TIM4, TIM_TS_ETRF);
TIM_SelectSlaveMode(TIM4, TIM_SlaveMode_Reset);
TIM_SelectMasterSlaveMode(TIM4, TIM_MasterSlaveMode_Enable);
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = ;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_ITConfig(TIM4, TIM_IT_CC1, ENABLE);
TIM_Cmd(TIM4, ENABLE);
}
```
希望对你有所帮助。
相关推荐
![7z](https://img-home.csdnimg.cn/images/20210720083312.png)
![7z](https://img-home.csdnimg.cn/images/20210720083312.png)
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)