feat: 保存已验证的CH390网络打通基线

Drivers/CH390/CH390.h

@@ -359,6 +359,19 @@ enum ch390_phy_mode
 #define CH390_PKT_MAX   1536    /* Received packet max size */
 #define CH390_PKT_MIN   64
 
+struct ch390_runtime_status
+{
+    uint8_t int_status;
+    uint8_t nsr;
+    uint8_t bcastcr;
+    uint8_t mar7;
+    uint8_t mrcmdx;
+    uint8_t mrcmdx1;
+    uint8_t mrrl;
+    uint8_t mrrh;
+    uint8_t link_up;
+};
+
 /********************************************************************
  * Functions
  */
@@ -620,4 +633,45 @@ void ch390_int_pin_config(uint8_t type, uint8_t pol);
  */
 uint8_t ch390_get_int_status(void);
 
+/**
+ * @name ch390_runtime_poll
+ * @brief Poll runtime state, sample diagnostic registers, and clear ISR flags.
+ * @param status - Output runtime status snapshot
+ * @return Interrupt status snapshot
+ */
+uint8_t ch390_runtime_poll(struct ch390_runtime_status *status);
+
+/**
+ * @name ch390_runtime_link_up_from_status
+ * @brief Get link state from a runtime status snapshot
+ * @param status - Runtime status snapshot
+ * @return 0: Link down  1: Link up
+ */
+int ch390_runtime_link_up_from_status(const struct ch390_runtime_status *status);
+
+/**
+ * @name ch390_probe_rx_header
+ * @brief Diagnostic helper: read 4-byte RX header directly from RX SRAM.
+ *        Caller must restore MRR if a non-destructive probe is required.
+ * @param head - Output buffer with at least 4 bytes.
+ */
+void ch390_probe_rx_header(uint8_t *head);
+
+/**
+ * @name ch390_runtime_receive_packet
+ * @brief Runtime RX entry point for packet receive
+ * @param buff - Size equal to CH390_PKT_MAX
+ * @param rx_status - Output abnormal status while receiving packet
+ * @return Packet length
+ */
+uint32_t ch390_runtime_receive_packet(uint8_t *buff, uint8_t *rx_status);
+
+/**
+ * @name ch390_runtime_send_packet
+ * @brief Runtime TX entry point for packet transmit
+ * @param buff - Data to be sent
+ * @param length - Less than 3k bytes.
+ */
+void ch390_runtime_send_packet(uint8_t *buff, uint16_t length);
+
 #endif /* __CH390_H */