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****/
jtc_88 发表于 2016-5-12 08:22
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 ...
感谢哦，，我研究一下，还真没有用过HAL库的定时器呢，，之前都是在用标准库的
jtc_88 发表于 2016-5-12 08:22
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 ...
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
是不是写IIC的那个孩子？nop啊
david2016 发表于 2016-5-12 17:37
是不是写IIC的那个孩子？nop啊
i不是，我是在写DHT11:L
烟花绽放 发表于 2016-5-13 09:26
i不是，我是在写DHT11
DHT11不就是用的IIC么，。你不是CUBE群里问us延时问题的那个孩子？
david2016 发表于 2016-5-13 11:17
DHT11不就是用的IIC么，。你不是CUBE群里问us延时问题的那个孩子？
汗，DHT11不是IIC驱动的，是单总线的，，，我没有在群里问us级延时，只在这边论坛发的帖子
烟花绽放 发表于 2016-5-13 13:02
汗，DHT11不是IIC驱动的，是单总线的，，，我没有在群里问us级延时，只在这边论坛发的帖子
...
好吧，我记错了。 SHT21 是用的IIC。。。
楼主你好，你的这个us级延时有没有写好啊，能不能给我发下这个代码，我现在也在写DH11,到了这个延时也不会了，谢谢了!我的邮箱294097034@qq.com.