TIM1 输入捕获1hz代码
时间: 2023-11-12 17:53:59 浏览: 95
stm8 time1输入捕获
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以下是一个基于STM32的TIM1输入捕获1Hz代码示例:
```c
#include "stm32f4xx.h"
volatile uint32_t pulse_count = 0; // 计数器
int main(void)
{
// 初始化GPIO和TIM1
GPIO_InitTypeDef GPIO_InitStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_TIM1);
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter = 0;
TIM_ICInit(TIM1, &TIM_ICInitStructure);
NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_ClearITPendingBit(TIM1, TIM_IT_CC1);
TIM_ITConfig(TIM1, TIM_IT_CC1, ENABLE);
TIM_Cmd(TIM1, ENABLE);
while (1)
{
// 计算1秒钟内的脉冲数
uint32_t current_pulse_count = pulse_count;
pulse_count = 0;
uint32_t frequency = current_pulse_count;
// 做你需要的操作
}
}
// TIM1输入捕获中断处理函数
void TIM1_CC_IRQHandler(void)
{
if (TIM_GetITStatus(TIM1, TIM_IT_CC1) != RESET)
{
// 1秒钟内的脉冲数加1
pulse_count++;
TIM_ClearITPendingBit(TIM1, TIM_IT_CC1);
}
}
```
这个代码示例使用TIM1的通道1来捕获输入脉冲,并在每个脉冲上升沿触发中断。在中断处理函数中,将1秒钟内的脉冲数加1。在主循环中,计算1秒内的脉冲数并进行相应的操作。
请注意,在使用此代码示例时,您需要根据您的硬件设置适当地更改GPIO和TIM1的配置。
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