编写STM32F103C8T6 的hal 库 DS18B20 温度传感器的驱动程序

### STM32F103C8T6 HAL Library DS18B20 Temperature Sensor Driver Code Example Tutorial For the STM32F103C8T6 microcontroller using the HAL library to interface with a DS18B20 temperature sensor, an effective method involves defining specific operations such as initialization and reading temperatures through custom functions within a header file `ds18b20.h` and its corresponding source file. In the provided code snippet from the header file of the DS18B20 driver for STM32F103 series utilizing HAL libraries, several macros are defined for pin configuration on port A, including commands like skip ROM (`SkipROM`) which allows skipping the search routine when only one device is connected or initiating conversion (`StartConvert`). Additionally, there's functionality encapsulated into two primary methods: initializing the sensor connection via `void ds18b20_init(void)` and obtaining the current temperature measurement by calling `float ds18b20_read(void)`[^3]. Below demonstrates how these components can be implemented: #### Header File Definition ```c #ifndef __DS18B20_H #define __DS18B20_H #include "main.h" // Command definitions for DS18B20 communication protocol #define SkipROM 0xCC #define StartConvert 0x44 #define ReadScratchpad 0xBE // Pin configurations #define DS_PORT GPIOA #define DS_DQIO GPIO_PIN_12 // Inline macro functions for setting/resetting/reading data line state #define ResetDQ() HAL_GPIO_WritePin(DS_PORT, DS_DQIO, GPIO_PIN_RESET) #define SetDQ() HAL_GPIO_WritePin(DS_PORT, DS_DQIO, GPIO_PIN_SET) #define GetDQ() HAL_GPIO_ReadPin(DS_PORT, DS_DQIO) /** * @brief Initializes the DS18B20 sensor. */ void ds18b20_init(void); /** * @brief Reads the temperature value from the DS18B20 sensor. * * @return The measured temperature as a floating-point number. */ float ds18b20_read(void); #endif /* __DS18B20_H */ ``` The implementation would involve writing C functions that utilize low-level I/O access routines offered by the HAL library to communicate over One-Wire bus protocol required by DS18B20 sensors. This includes sending command bytes, handling timing requirements during read/write cycles, converting raw binary values received back from scratch pad memory registers inside the sensor chip into actual Celsius degrees representation suitable for display purposes or further processing tasks within embedded applications running atop this hardware platform. To integrate this setup effectively in projects based around STM32CubeMX-generated frameworks where HAL drivers have been configured automatically alongside standard peripheral interfaces (like UART), developers should ensure proper inclusion paths exist between project files so that both headers and implementations remain accessible throughout compilation units involved in building final firmware binaries intended for deployment onto target boards featuring selected ARM Cortex-M core variants supported under STMicroelectronics' product lineup specifications outlined officially documented resources related specifically towards programming practices recommended best suited given context surrounding application development targeting resource-constrained environments typical found among IoT devices relying heavily upon efficient power management strategies coupled closely together alongside robust connectivity options facilitated through various wireless standards widely adopted across industry sectors today.