fix: harden CH390 bring-up diagnostics

App/config.c

@@ -441,7 +441,6 @@ bool config_try_process_frame(const uint8_t *data, uint16_t len)
     char response[CONFIG_TX_BUFFER_SIZE];
     char cmd_buffer[CONFIG_CMD_MAX_LEN];
     at_result_t result;
-    HAL_StatusTypeDef tx_status;
 
     if (data == NULL || len < 2u) {
         return false;
@@ -460,11 +459,21 @@ bool config_try_process_frame(const uint8_t *data, uint16_t len)
     }
 
     result = config_process_at_cmd(cmd_buffer, response, sizeof(response));
-    tx_status = HAL_UART_Transmit(&CONFIG_UART_HANDLE, (uint8_t *)response, (uint16_t)strlen(response), 1000u);
+    if (HAL_UART_Transmit(&CONFIG_UART_HANDLE,
+                          (uint8_t *)response,
+                          (uint16_t)strlen(response),
+                          1000u) != HAL_OK) {
+        return false;
+    }
 
     if (result == AT_NEED_REBOOT) {
         static const char hint[] = "Note: Use AT+SAVE then AT+RESET to apply changes\r\n";
-        tx_status = HAL_UART_Transmit(&CONFIG_UART_HANDLE, (uint8_t *)hint, sizeof(hint) - 1u, 1000u);
+        if (HAL_UART_Transmit(&CONFIG_UART_HANDLE,
+                              (uint8_t *)hint,
+                              sizeof(hint) - 1u,
+                              1000u) != HAL_OK) {
+            return false;
+        }
     }
 
     return true;

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();

Drivers/CH390/ch390_runtime.c

@@ -13,7 +13,7 @@ static volatile uint8_t g_ch390_irq_pending;
 static uint8_t g_ch390_ready;
 static ch390_diag_t g_diag;
 
-static void ch390_runtime_refresh_diag(void)
+static uint8_t ch390_runtime_probe_identity(void)
 {
     g_diag.vendor_id = ch390_get_vendor_id();
     g_diag.product_id = ch390_get_product_id();
@@ -25,11 +25,21 @@ static void ch390_runtime_refresh_diag(void)
     g_diag.intcr = ch390_read_reg(CH390_INTCR);
     g_diag.gpr = ch390_read_reg(CH390_GPR);
     g_diag.isr = ch390_read_reg(CH390_ISR);
-    g_diag.link_up = (uint8_t)ch390_get_link_status();
+    g_diag.link_up = (uint8_t)0u;
     g_diag.id_valid = (uint8_t)((g_diag.vendor_id != 0x0000u) &&
                                 (g_diag.vendor_id != 0xFFFFu) &&
                                 (g_diag.product_id != 0x0000u) &&
                                 (g_diag.product_id != 0xFFFFu));
+    return g_diag.id_valid;
+}
+
+static void ch390_runtime_refresh_diag(void)
+{
+    uint8_t id_valid = ch390_runtime_probe_identity();
+
+    if (id_valid != 0u) {
+        g_diag.link_up = (uint8_t)ch390_get_link_status();
+    }
 }
 
 static struct pbuf *ch390_runtime_input(struct netif *netif)
@@ -38,6 +48,7 @@ static struct pbuf *ch390_runtime_input(struct netif *netif)
     struct pbuf *p = NULL;
     struct pbuf *q;
     uint16_t len;
+    uint8_t rcr;
     uint8_t rx_ready;
     uint8_t rx_header[4];
 
@@ -45,11 +56,12 @@ static struct pbuf *ch390_runtime_input(struct netif *netif)
     rx_ready = ch390_read_reg(CH390_MRCMDX);
 
     if (rx_ready & CH390_PKT_ERR) {
-        ch390_write_reg(CH390_RCR, 0u);
+        rcr = ch390_read_reg(CH390_RCR);
+        ch390_write_reg(CH390_RCR, (uint8_t)(rcr & (uint8_t)(~RCR_RXEN)));
         ch390_write_reg(CH390_MPTRCR, 0x01u);
         ch390_write_reg(CH390_MRRH, 0x0Cu);
         ch390_delay_us(1000u);
-        ch390_write_reg(CH390_RCR, RCR_RXEN | RCR_DIS_CRC);
+        ch390_write_reg(CH390_RCR, rcr);
         ethernetif->rx_len = 0u;
         LINK_STATS_INC(link.drop);
         return NULL;
@@ -107,6 +119,22 @@ void ch390_runtime_init(struct netif *netif, const uint8_t *mac)
     ch390_spi_init();
     SEGGER_RTT_WriteString(0, "ETH init: reset\r\n");
     ch390_hardware_reset();
+
+    SEGGER_RTT_WriteString(0, "ETH init: probe\r\n");
+    g_ch390_ready = ch390_runtime_probe_identity();
+    if (g_ch390_ready == 0u) {
+        netif->hwaddr_len = ETHARP_HWADDR_LEN;
+        netif->mtu = 1500;
+        netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
+
+        ethernetif->rx_len = 0u;
+        ethernetif->rx_status = 0u;
+
+        netif_set_link_down(netif);
+        SEGGER_RTT_WriteString(0, "ETH init: invalid chip id\r\n");
+        return;
+    }
+
     SEGGER_RTT_WriteString(0, "ETH init: default\r\n");
     ch390_default_config();
     SEGGER_RTT_WriteString(0, "ETH init: mac\r\n");
@@ -151,6 +179,7 @@ void ch390_runtime_poll(struct netif *netif)
     ch390_write_reg(CH390_ISR, int_status);
 
     if ((int_status & ISR_LNKCHG) != 0u) {
+        HAL_Delay(65u);
         ch390_runtime_check_link(netif);
     }