fix: harden CH390 bring-up diagnostics

Core/Src/main.c

@@ -51,12 +51,6 @@
 
 /* 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
@@ -79,7 +73,6 @@ volatile uint8_t g_uart1_rx_probe_byte = 0u;
 /* Private function prototypes -----------------------------------------------*/
 void SystemClock_Config(void);
 /* USER CODE BEGIN PFP */
-static void CH390_HardwareReset(void);
 static void LED_Init(void);
 static void LED_StartBlink(void);
 static void BootDiag_ReportCh390(void);
@@ -91,24 +84,6 @@ static void App_Poll(void);
 /* 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）
  */
@@ -318,9 +293,7 @@ int main(void)
   MX_SPI1_Init();
   MX_TIM4_Init();
   /* USER CODE BEGIN 2 */
-  
-  ch390_hardware_reset();
-  
+
   /* LED 初始化 */
   LED_Init();
   LED_StartBlink();