1.时钟配置HSI主频配置64M

2.配置好串口，选择异步模式

 

3.配置TIM1_CH1产生1KHz的信号，主频64MHz，分频（64-1），计数周期（1000-1），这样即可生成1KHz信号。

 4.配置TIM3_CH1和TIM3_CH2做输入捕获。

配置好需要的开发环境并获取代码

 修改main.c

串口重定向

#include "stdio.h"
int fputc(int ch, FILE *f)
{
  HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xFFFF);
  return ch;
}

 串口重定向一定要勾选Use Micro LIB 

 增加TIM1_Channel1_Set函数

void TIM1_Channel1_Set(uint8_t val)
{
	uint16_t temp = 0;
	
	temp = (val * 10);
	TIM_OC_InitTypeDef sConfigOC = {0};
	sConfigOC.OCMode = TIM_OCMODE_PWM1;
	sConfigOC.Pulse = temp;
	sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
	sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
	sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
	sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
	sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
	if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
	{
		Error_Handler();
	}
	printf("temp = %d\r\n", temp);
	//HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
}

 MX_TIM3_Init函数修改

void MX_TIM3_Init(void)
{

  /* USER CODE BEGIN TIM3_Init 0 */

  /* USER CODE END TIM3_Init 0 */

  TIM_SlaveConfigTypeDef sSlaveConfig = {0};
  TIM_MasterConfigTypeDef sMasterConfig = {0};
  TIM_IC_InitTypeDef sConfigIC = {0};

  /* USER CODE BEGIN TIM3_Init 1 */

  /* USER CODE END TIM3_Init 1 */
  htim3.Instance = TIM3;
  htim3.Init.Prescaler = 64-1;
  htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim3.Init.Period = 65535;
  htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
  if (HAL_TIM_Base_Init(&htim3) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_TIM_IC_Init(&htim3) != HAL_OK)
  {
    Error_Handler();
  }
  sSlaveConfig.SlaveMode = TIM_SLAVEMODE_RESET;
  sSlaveConfig.InputTrigger = TIM_TS_TI1FP1;
  sSlaveConfig.TriggerPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
  sSlaveConfig.TriggerFilter = 0;
  if (HAL_TIM_SlaveConfigSynchro(&htim3, &sSlaveConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
  sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
  sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
  sConfigIC.ICFilter = 0xf;
  if (HAL_TIM_IC_ConfigChannel(&htim3, &sConfigIC, TIM_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
  sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_FALLING;
  sConfigIC.ICSelection = TIM_ICSELECTION_INDIRECTTI;
  sConfigIC.ICFilter = 0;
  if (HAL_TIM_IC_ConfigChannel(&htim3, &sConfigIC, TIM_CHANNEL_2) != HAL_OK)
  {
    Error_Handler();
  }
	HAL_TIM_IC_Start(&htim3, TIM_CHANNEL_1);
	HAL_TIM_IC_Start(&htim3, TIM_CHANNEL_2);
  
  /* USER CODE BEGIN TIM3_Init 2 */

  /* USER CODE END TIM3_Init 2 */

}

主函数修改 

int main(void)
{
	uint16_t Pulse_Value = 0;
	uint16_t Duty_Value = 0;
	uint16_t freq;
	uint16_t duty;
	
	HAL_Init();
	SystemClock_Config();
	MX_GPIO_Init();
	MX_TIM1_Init();
	MX_TIM3_Init();
	MX_USART1_UART_Init();
	printf("main init\r\n");
	TIM1_Channel1_Set(30);
	
	while (1)
	{
		Pulse_Value = HAL_TIM_ReadCapturedValue(&htim3, TIM_CHANNEL_1);
		Duty_Value = HAL_TIM_ReadCapturedValue(&htim3, TIM_CHANNEL_2);
		HAL_Delay(1000);
		if(Pulse_Value != 0)
		{
			freq = 1000000 / (Pulse_Value + 1);
			duty = 100 * (Duty_Value + 1) / Pulse_Value;
			
			printf("freq = %d\r\n", freq);
			printf("duty = %d\r\n", duty);
			printf("Pulse_Value = %d\r\n", Pulse_Value);
			printf("Duty_Value = %d\r\n", Duty_Value);
		}
	}
}

串口打印