用systick写个定时，可以到1us，挺准的

试了，，但是也是不行，今天晚上回去写个像用51时的延时函数，不行的话就开个定时器

我去试一下

本帖最后由 jtc_88 于 2016-5-12 08:26 编辑

我使用的STM32F030R8 的程序 别的改一下 DS18B20试过没问题 可以达到效果，这个程序我后来移植了好几个项目，成熟度还是可以的，STM32的定时器多可以这么使用。
微秒级延时用函数
*/
void Delay_us(uint16_t nus)
{
        __HAL_TIM_SetCounter(&htim17, 0);//htim17 可以更改为任何一个 定时器

        __HAL_TIM_ENABLE(&htim17);        

        while(__HAL_TIM_GetCounter(&htim17) < (48 * nus));//48是系统时钟频率 更换不同的 系列单片机 只修改 48这个数据
         /* Disable the Peripheral */
        __HAL_TIM_DISABLE(&htim17);
}
《tim.c》
/**
  ******************************************************************************
  * File Name          : TIM.c
  * Description        : This file provides code for the configuration
  *                      of the TIM instances.
  ******************************************************************************
  *
  * COPYRIGHT(c) 2016 STMicroelectronics
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "tim.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

TIM_HandleTypeDef htim14;
TIM_HandleTypeDef htim16;
TIM_HandleTypeDef htim17;

/* TIM14 init function */
void MX_TIM14_Init(void)
{

  htim14.Instance = TIM14;
  htim14.Init.Prescaler = 0;
  htim14.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim14.Init.Period = 65535;
  htim14.Init.ClockDivision = TIM_CLOCKDIVISION_DIV2;
  HAL_TIM_Base_Init(&htim14);

}
/* TIM16 init function */
void MX_TIM16_Init(void)
{

  htim16.Instance = TIM16;
  htim16.Init.Prescaler = TIM16_PSC;
  htim16.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim16.Init.Period = 65535;
  htim16.Init.ClockDivision = TIM_CLOCKDIVISION_DIV2;
  htim16.Init.RepetitionCounter = 0;
  HAL_TIM_Base_Init(&htim16);

}
/* TIM17 init function */
void MX_TIM17_Init(void)
{

  htim17.Instance = TIM17;
  htim17.Init.Prescaler = 0;
  htim17.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim17.Init.Period = 65535;
  htim17.Init.ClockDivision = TIM_CLOCKDIVISION_DIV2;
  htim17.Init.RepetitionCounter = 0;
  HAL_TIM_Base_Init(&htim17);

}

void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)
{

  if(htim_base->Instance==TIM14)
  {
  /* USER CODE BEGIN TIM14_MspInit 0 */

  /* USER CODE END TIM14_MspInit 0 */
    /* Peripheral clock enable */
    __TIM14_CLK_ENABLE();
  /* USER CODE BEGIN TIM14_MspInit 1 */

  /* USER CODE END TIM14_MspInit 1 */
  }
  else if(htim_base->Instance==TIM16)
  {
  /* USER CODE BEGIN TIM16_MspInit 0 */

  /* USER CODE END TIM16_MspInit 0 */
    /* Peripheral clock enable */
    __TIM16_CLK_ENABLE();
  /* USER CODE BEGIN TIM16_MspInit 1 */

  /* USER CODE END TIM16_MspInit 1 */
  }
  else if(htim_base->Instance==TIM17)
  {
  /* USER CODE BEGIN TIM17_MspInit 0 */

  /* USER CODE END TIM17_MspInit 0 */
    /* Peripheral clock enable */
    __TIM17_CLK_ENABLE();
  /* USER CODE BEGIN TIM17_MspInit 1 */

  /* USER CODE END TIM17_MspInit 1 */
  }
}

void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* htim_base)
{

  if(htim_base->Instance==TIM14)
  {
  /* USER CODE BEGIN TIM14_MspDeInit 0 */

  /* USER CODE END TIM14_MspDeInit 0 */
    /* Peripheral clock disable */
    __TIM14_CLK_DISABLE();
  /* USER CODE BEGIN TIM14_MspDeInit 1 */

  /* USER CODE END TIM14_MspDeInit 1 */
  }
  else if(htim_base->Instance==TIM16)
  {
  /* USER CODE BEGIN TIM16_MspDeInit 0 */

  /* USER CODE END TIM16_MspDeInit 0 */
    /* Peripheral clock disable */
    __TIM16_CLK_DISABLE();
  /* USER CODE BEGIN TIM16_MspDeInit 1 */

  /* USER CODE END TIM16_MspDeInit 1 */
  }
  else if(htim_base->Instance==TIM17)
  {
  /* USER CODE BEGIN TIM17_MspDeInit 0 */

  /* USER CODE END TIM17_MspDeInit 0 */
    /* Peripheral clock disable */
    __TIM17_CLK_DISABLE();
  /* USER CODE BEGIN TIM17_MspDeInit 1 */

  /* USER CODE END TIM17_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

吔屎蛋拉雷 发表于 2018-10-31 14:33
本帖最后由 jtc_88 于 2016-5-12 08:26 编辑

我使用的STM32F030R8 的程序 别的改一下 DS18B20试过没问题 可以达到效果，这个程序我后来移植了好几个项目，成熟度还是可以的，STM32的定时器多可以这么使用。

你好，能不能麻烦你发一下完整的工程，这段代码不是太明白，。适应STM32CUBE生产的定时器工程也在看，但是和你发的这段代码不太相同