refactor: 完成R8裸机lwIP移植并更新文档

Drivers/LwIP/src/netif/ethernetif.h

@@ -1,63 +1,27 @@
 /**
  * @file ethernetif.h
- * @brief Ethernet interface header for CH390 + LwIP + FreeRTOS
+ * @brief CH390 Ethernet interface for lwIP NO_SYS mode.
  */
 
 #ifndef __ETHERNETIF_H__
 #define __ETHERNETIF_H__
 
-#include "lwip/netif.h"
 #include "lwip/err.h"
+#include "lwip/netif.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Ethernet interface state structure */
 struct ethernetif {
     uint16_t rx_len;
-    uint8_t  rx_status;
+    uint8_t rx_status;
 };
 
-/* Global network interface */
 extern struct netif ch390_netif;
 
-/**
- * @brief Initialize the ethernet interface
- * @param netif Network interface structure
- * @return ERR_OK on success
- */
 err_t ethernetif_init(struct netif *netif);
-
-/**
- * @brief Process received ethernet packets
- * @param netif Network interface structure
- * @note Call this from the LwIP task when packets are available
- */
 void ethernetif_input(struct netif *netif);
-
-/**
- * @brief Initialize LwIP network interface with static IP
- * @param ipaddr IP address
- * @param netmask Network mask
- * @param gw Gateway address
- */
 void lwip_netif_init(const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw);
-
-/**
- * @brief Check and handle CH390 interrupt status
- * @note Call this from the LwIP task periodically or on interrupt
- */
 void ethernetif_check_link(void);
-
-/**
- * @brief Process all pending RX packets
- * @note Call this from the LwIP task when RX interrupt occurs
- */
 void ethernetif_poll(void);
+void ethernetif_set_irq_pending(void);
+uint8_t ethernetif_is_irq_pending(void);
 
-#ifdef __cplusplus
-}
 #endif
-
-#endif /* __ETHERNETIF_H__ */