feat: 完成TCP2UART透传核心集成

集成CH390驱动、LwIP协议栈和FreeRTOS多任务透传框架，确保TCP Server/Client与UART链路按配置稳定联动。

Core/Src/main.c

@@ -27,7 +27,12 @@
 
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
+#include <stdio.h>
 
+#include "CH390.h"
+#include "config.h"
+#include "flash_param.h"
+#include "uart_trans.h"
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -37,7 +42,15 @@
 
 /* Private define ------------------------------------------------------------*/
 /* USER CODE BEGIN PD */
+/* CH390 硬件控制引脚 */
+#define CH390_RST_PIN       GPIO_PIN_1
+#define CH390_RST_PORT      GPIOB
+#define CH390_CS_PIN        GPIO_PIN_4
+#define CH390_CS_PORT       GPIOA
 
+/* LED 指示灯 */
+#define LED_PIN             GPIO_PIN_13
+#define LED_PORT            GPIOC
 /* USER CODE END PD */
 
 /* Private macro -------------------------------------------------------------*/
@@ -55,12 +68,48 @@
 void SystemClock_Config(void);
 void MX_FREERTOS_Init(void);
 /* USER CODE BEGIN PFP */
-
+static void CH390_HardwareReset(void);
+static void LED_Init(void);
 /* USER CODE END PFP */
 
 /* Private user code ---------------------------------------------------------*/
 /* USER CODE BEGIN 0 */
 
+/**
+ * @brief CH390 硬件复位
+ * @note  复位时序: RST 低电平至少 10us，然后高电平等待 50ms 完成初始化
+ */
+static void CH390_HardwareReset(void)
+{
+    /* 拉低 RST 引脚 */
+    HAL_GPIO_WritePin(CH390_RST_PORT, CH390_RST_PIN, GPIO_PIN_RESET);
+    HAL_Delay(1);  /* 保持低电平 1ms (远超最小 10us 要求) */
+    
+    /* 拉高 RST 引脚，等待芯片初始化完成 */
+    HAL_GPIO_WritePin(CH390_RST_PORT, CH390_RST_PIN, GPIO_PIN_SET);
+    HAL_Delay(50); /* 等待 50ms */
+    
+    /* 确保 CS 为高电平（未选中状态） */
+    HAL_GPIO_WritePin(CH390_CS_PORT, CH390_CS_PIN, GPIO_PIN_SET);
+}
+
+/**
+ * @brief LED 初始化（点亮表示系统启动）
+ */
+static void LED_Init(void)
+{
+    /* LED 灭（PC13 高电平灭，低电平亮） */
+    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
+}
+
+/**
+ * @brief LED 闪烁（用于指示系统运行状态）
+ */
+void LED_Toggle(void)
+{
+    HAL_GPIO_TogglePin(LED_PORT, LED_PIN);
+}
+
 /* USER CODE END 0 */
 
 /**
@@ -99,7 +148,16 @@ int main(void)
   MX_USART3_UART_Init();
   MX_SPI1_Init();
   /* USER CODE BEGIN 2 */
-
+  
+  /* LED 初始化 */
+  LED_Init();
+  
+  /* CH390 硬件复位 */
+  CH390_HardwareReset();
+  
+  /* Initialize configuration from Flash (fallback to defaults on invalid data) */
+  config_init();
+  
   /* USER CODE END 2 */
 
   /* Init scheduler */
@@ -164,6 +222,23 @@ void SystemClock_Config(void)
 
 /* USER CODE BEGIN 4 */
 
+/**
+ * @brief  重定向 printf 到 UART1（调试输出）
+ */
+#ifdef __GNUC__
+int _write(int file, char *ptr, int len)
+{
+    HAL_UART_Transmit(&huart1, (uint8_t *)ptr, len, HAL_MAX_DELAY);
+    return len;
+}
+#else
+int fputc(int ch, FILE *f)
+{
+    HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, HAL_MAX_DELAY);
+    return ch;
+}
+#endif
+
 /* USER CODE END 4 */
 
 /**