feat: add delayed uart and runtime mac configuration

Core/Src/main.c

@@ -68,6 +68,7 @@ void MX_FREERTOS_Init(void);
 /* USER CODE BEGIN PFP */
 static void CH390_HardwareReset(void);
 static void LED_Init(void);
+static void ApplyConfiguredUartBaudrates(void);
 void Debug_TrapWithRttHint(const char *tag);
 /* USER CODE END PFP */
 
@@ -109,6 +110,12 @@ void LED_Toggle(void)
     HAL_GPIO_TogglePin(LED_PORT, LED_PIN);
 }
 
+static void ApplyConfiguredUartBaudrates(void)
+{
+    USART_SetConfiguredBaudrates(config_get_uart_baudrate(LINK_UART_U0),
+                                 config_get_uart_baudrate(LINK_UART_U1));
+}
+
 /* USER CODE END 0 */
 
 /**
@@ -143,6 +150,8 @@ int main(void)
   MX_GPIO_Init();
   MX_DMA_Init();
   MX_USART1_UART_Init();
+  config_init();
+  ApplyConfiguredUartBaudrates();
   MX_USART2_UART_Init();
   MX_USART3_UART_Init();
   MX_SPI1_Init();
@@ -155,8 +164,6 @@ int main(void)
   /* CH390 硬件复位 */
   CH390_HardwareReset();
   
-  /* Initialize configuration from Flash (fallback to defaults on invalid data) */
-  config_init();
   debug_log_boot("config-ready");
   
   /* USER CODE END 2 */