实现串口驱动，移植方便

Modules/uart/src/uart.c

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+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file           : uart.c
+  * @brief          : UART driver module source file
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+
+#include "uart.h"
+#include <string.h>
+
+/* UART instance */
+static uart_t uart;
+
+/**
+ * @brief Initialize UART module
+ */
+void uart_init(void) {
+    /* Initialize hardware abstraction layer */
+    hal_uart_init();
+    
+    /* Set default configuration */
+    uart.config.baudrate = 115200;
+    uart.config.parity = HAL_UART_PARITY_NONE;
+    uart.config.stopbits = HAL_UART_STOPBITS_1;
+    uart.config.databits = HAL_UART_DATABITS_8;
+    
+    /* Configure UART with default settings */
+    hal_uart_config((hal_uart_config_t *)&uart.config);
+    
+    uart.initialized = 1;
+}
+
+/**
+ * @brief Configure UART parameters
+ * @param config: UART configuration structure
+ */
+void uart_config(const uart_config_t *config) {
+    if (config == NULL) {
+        return;
+    }
+    
+    /* Update configuration */
+    uart.config = *config;
+    
+    /* Configure hardware */
+    hal_uart_config((hal_uart_config_t *)&uart.config);
+}
+
+/**
+ * @brief Send data over UART
+ * @param data: Pointer to data buffer
+ * @param length: Data length in bytes
+ */
+void uart_send(const uint8_t *data, size_t length) {
+    if (data == NULL || length == 0) {
+        return;
+    }
+    
+    hal_uart_send(data, length);
+}
+
+/**
+ * @brief Send string over UART
+ * @param str: Pointer to string
+ */
+void uart_send_string(const char *str) {
+    if (str == NULL) {
+        return;
+    }
+    
+    hal_uart_send((const uint8_t *)str, strlen(str));
+}
+
+/**
+ * @brief Receive data over UART
+ * @param data: Pointer to data buffer
+ * @param length: Data length to receive in bytes
+ * @retval Number of bytes received
+ */
+size_t uart_receive(uint8_t *data, size_t length) {
+    if (data == NULL || length == 0) {
+        return 0;
+    }
+    
+    return hal_uart_receive(data, length);
+}
+
+/**
+ * @brief Check if UART is ready to send
+ * @retval 1 if ready, 0 otherwise
+ */
+uint8_t uart_is_tx_ready(void) {
+    return hal_uart_is_tx_ready();
+}
+
+/**
+ * @brief Check if UART has data to receive
+ * @retval 1 if data available, 0 otherwise
+ */
+uint8_t uart_is_rx_ready(void) {
+    return hal_uart_is_rx_ready();
+}