DS18B20 参考资料：
https://pan.baidu.com/s/12PtTZ8x602_XqnqFnq_Z6g
提取码：c77i
常见的驱动原理图：
读取DS18B20 Memory Map数据效果：
STM32CubeMX配置内容
使用了一个基本定时器6，作为DS18B20时间基准用。
分频系数是根据所挂载的时钟总线决定的，定时器一般都是挂载在APB1或者APB2时钟总线上的，不同型号的STM32系列单片机主时钟频率不一样。像stm32F103主频72MHz，stm32f401主频84MHz，具体的分频系数根据主频来分即可。最终分的频率1MHz也就是1us周期.
时钟源
DS18B20引脚配置(注意给引脚添加名为DS18B20标签，方便导入ds18b20源文件之后，不用做任何代码修改)
串口配置
配置一个串口用于将读取DS18B20数据打印输出。
在usart.c文件中添加如下代码，用于printf打印输出，同时这Keil设置里面勾选MicroLib选项。
#include "stdio.h"
/*可调用printf*/
int fputc(int ch,FILE *f)
{
/*&huart1指的是串口1，如果用别的串口就修改数字*/
HAL_UART_Transmit(&huart1 , (uint8_t *)&ch , 1 , 1000);
return ch;
}
添加必要的源文件
onewire.c
ds18b20.c
在ds18b20.h文件中修改宏：（根据个人配置的定时器，修改下面的定时器句柄）
#define _DS18B20_TIMER htim6
主程序代码
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2023 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
#include "onewire.h"
#include "ds18b20.h"
#include "string.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
float temperature;
char message[64];
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART1_UART_Init();
MX_TIM6_Init();
/* USER CODE BEGIN 2 */
DS18B20_Init(DS18B20_Resolution_12bits);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
DS18B20_ReadAll();
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7, GPIO_PIN_SET);
DS18B20_StartAll();
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7, GPIO_PIN_RESET);
uint8_t ROM_tmp[8];
uint8_t i;
for (i = 0; i < DS18B20_Quantity(); i++)
{
if (DS18B20_GetTemperature(i, &temperature))
{
DS18B20_GetROM(i, ROM_tmp);
memset(message, 0, sizeof(message));
sprintf(message, "%d. ROM: %X%X%X%X%X%X%X%X Temp: %f\n\r", i, ROM_tmp[0], ROM_tmp[1], ROM_tmp[2], ROM_tmp[3], ROM_tmp[4], ROM_tmp[5], ROM_tmp[6], ROM_tmp[7], temperature);
printf("message=%s \r\n", message);
// HAL_UART_Transmit(&huart1, (uint8_t *)message, sizeof(message), 100);
}
}
printf("message=%s \r\n", message);
// HAL_UART_Transmit(&huart1, (uint8_t *)"\n\r", sizeof("\n\r"), 100);
HAL_Delay(1000);
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_7);
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
工程源码
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对于文中所提供的相关资源链接将作不定期更换。
链接: https://pan.baidu.com/s/135YLGiKKnzUwAcbv9fRTtg
提取码: 582k
更新补充（2024-6-26）
串口单线通讯读取DS18B20
原理实现介绍可以参考《爆改串口实现OneWire驱动DS18B20》
原理图如下：
或者：
缺点就是需要使用一个串口。经测试这种方式读取的温度，和其他方式读取的差异加到，需要修正。
下图对比：
差不多同一时刻，其他方式读取：
工程配置
配置2个串口，一个串口用于查看打印信息，另一个用于与DS18B20通讯。
波特率都默认为115200，异步通讯方式
程序源码
链接：https://pan.baidu.com/s/13BAAIm7janpgBu5smROY7w?pwd=ub41
提取码：ub41
测试效果：
————————————————
本文为Perseverance52博主原创文章，未经博主允许，不得转载！
原文链接：https://blog.csdn.net/weixin_42880082/article/details/129859344
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