stm32f103c8t6所有库函数

### STM32F103C8T6 UART Library Functions for Serial Communication For serial communication using UART on the STM32F103C8T6 microcontroller, several key library functions are provided by ST's HAL (Hardware Abstraction Layer) library. These functions facilitate configuration and data transmission over UART interfaces. #### Initialization Function The initialization function configures the UART peripheral according to specified parameters such as baud rate, word length, stop bits, parity mode, hardware flow control, etc. ```c HAL_StatusTypeDef HAL_UART_Init(UART_HandleTypeDef *huart); ``` This function initializes the UART handle `huart` with user-defined settings[^1]. #### Data Transmission Functions To send data through UART, multiple functions can be used depending on requirements: - **Blocking Send**: Sends a block of data in blocking mode until all bytes have been transferred or an error occurs. ```c HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout); ``` - **Non-blocking Send Using Interrupts**: Starts sending data without waiting; uses interrupts to manage completion. ```c HAL_StatusTypeDef HAL_UART_Transmit_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size); ``` - **DMA-based Transmit**: Utilizes DMA channels for efficient large-scale transfers. ```c HAL_StatusTypeDef HAL_UART_Transmit_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size); ``` #### Reception Functions Similarly, reception operations offer both synchronous and asynchronous methods: - **Receive Blocking Mode** ```c HAL_StatusTypeDef HAL_UART_Receive(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout); ``` - **Interrupt-driven Receive** ```c HAL_StatusTypeDef HAL_UART_Receive_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size); ``` - **DMA-based Receive** ```c HAL_StatusTypeDef HAL_UART_Receive_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size); ``` These functions provide comprehensive support for configuring and managing UART communications effectively within applications running on STM32 devices like the F103 series. --related questions-- 1. How does one configure advanced features of UART peripherals via HAL libraries? 2. What is the role of interrupt handlers when implementing non-blocking UART transactions? 3. Can you explain how DMA improves performance during UART data transfer compared to traditional polling techniques? 4. In what scenarios would it be preferable to use circular buffers alongside UART receive functionalities?

### STM32F103C8T6 HAL库函数使用教程 #### 初始化与配置 为了成功初始化STM32F103C8T6并使用HAL库，开发者应遵循特定的设置过程。这包括通过STM32CubeMX工具生成初始项目框架，在此过程中可以指定所需的外设和功能模块。完成硬件抽象层（HAL）库的选择后，该软件自动生成必要的初始化代码片段[^1]。 #### GPIO控制实例：点亮LED 对于初学者来说，最简单的入门例子莫过于控制GPIO来点亮一个LED。具体而言，PC13端口常被用于此类实验。在`main()`循环内调用`HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET);`可使连接到该引脚上的LED亮起；而将其替换为`GPIO_PIN_RESET`则会使LED熄灭[^2]。 ```c while (1) { /* Turn LED on */ HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET); /* Delay for a while */ HAL_Delay(500); /* Turn LED off */ HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET); /* Another delay */ HAL_Delay(500); } ``` #### 修改源码注意事项 当修改由STM32CubeMX产生的原始文件时需格外小心。任何位于用户定义区域之外编写的代码都可能在下次更新或重新生成工程时丢失。因此建议仅在标记有`USER CODE BEGIN` 和 `USER CODE END`之间的部分编写额外逻辑[^4]。 #### 内部Flash操作指南 除了基本输入输出操作外，HAL库同样支持更复杂的存储器管理任务，比如内部闪存读写。这里需要注意的是，访问内部Flash通常涉及特殊指令序列以及严格的安全措施以防止意外擦除数据。例如，要向地址`FLASH_BASE`(即`0x08000000`)处写入新内容前，必须先解锁相应页面，并确保正确处理所有中断请求[^3]。