1、IC(Input Capture)输入捕获——下图蓝框部分。 2、输入捕获模式下,当通道输入引脚出现指定电平跳变时,当前CNT的值将被锁存到CCR中,可用于测量PWM波形的频率、占空比、脉冲间隔、电平持续时间等参数。 3、每个高级定时器和通用定时器都拥有4个输入捕获通道。 4、可配置为PWMI模式,同时测量频率和占空比。
1. 概念 输入捕获(Input Capture)是一种用于测量外部信号脉冲宽度或者频率的技术,常用于测量传感器输出、编码器信号、脉冲调制信号等。输入捕获通常通过定时器模块来实现输入捕获功能。2. STM32F1 资源 STM32F1除了基本定时器TIM6和TIM7,其它定时器都具有输入捕获功能。3. 捕获原理 捕获原理是指通过定时器模块捕获...
TIM_ICInit(TIM3,&TIM_ICInitStructure);//用结构体配置输入捕获单元(单一配置一个通道)TIM_SelectInputTrigger(TIM3, TIM_TS_TI1FP1);//选择从模式输出的触发源TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Reset);//选择从模式TIM_Cmd(TIM3, ENABLE); } uint32_t IC_GetFreq(void) {return1000000/ (TIM...
which can be used as trigger input by the slave mode controller or as the capture command. It is prescaled before the capture register (ICxPS). In Input capture mode, the Capture/Compare Registers (TIMx_CCRx) are used to latch the value of the counter after a transition detected by the...
TIMx capture/compare mode register 1 (TIMx_CCMR1) Address offset: 0x18 Reset value: 0x0000 The channelscanbe used in input (capture mode)orin output (compare mode). The direction of a channel is defined by configuring the corresponding CCxS bits. All the other ...
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数 TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); //初始化TIM3 Channel3输入捕获IC(Input Capture) TIM_ICInitStructure.TIM_Channel=TIM_Channel_3; TIM_ICInitStructure.TIM_ICPolari...
void TIM2_signal_input_Init(void) 这个函数放在主函数的初始化中。裸机时放在main函数的主while循环前。 void TIM2_IRQHandler(void) 这个函数就是中断服务函数,没强制要求放在固定位置。 if(TIM2CH1_CAPTURE_STA&0X80) 开头的函数为数据处理函数,如果使用RTOS,则最好使用消息队列。如果是裸机跑的话,建议放在ma...
* @brief :TIM1 Input capture overflow count callback function. * @param :none. * @retval :none. * @note :0xFF 为避免出现捕获到周期过长的异常输出(只捕获到一个上升沿、输入波形中断等) **/ void TIM1_IcOverflowCntCallback(void)
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数 TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); //初始化TIM3Channel3输入捕获IC(Input Capture) TIM_ICInitStructure.TIM_Channel=TIM_Channel_3; TIM_ICInitStructure.TIM_ICPolarity...