QEMU: manually init ethernet and DHCP via esp-idf

Author: softhack007

wled00/wled.cpp

@@ -1076,6 +1076,18 @@ bool WLED::initEthernet()
   #ifdef WLED_QEMU
   // QEMU: Skip hardware initialization - QEMU's open_eth doesn't fully emulate MAC registers
   // The ethernet hardware init crashes with LoadStorePIFAddrError in emac_ll_clock_enable_rmii_output
+
+  // Don't call ETH.begin() - avoids MAC register crash
+  // But manually initialize lwIP and DHCP for QEMU
+  tcpip_adapter_init();
+  tcpip_adapter_dhcpc_start(TCPIP_ADAPTER_IF_ETH);
+  // Or set static IP:
+  // tcpip_adapter_ip_info_t ip_info;
+  // IP4_ADDR(&ip_info.ip, 10, 0, 2, 15);
+  // IP4_ADDR(&ip_info.gw, 10, 0, 2, 2);
+  // IP4_ADDR(&ip_info.netmask, 255, 255, 255, 0);
+  // tcpip_adapter_set_ip_info(TCPIP_ADAPTER_IF_ETH, &ip_info);
+
   // Network stack will still work via QEMU's user-mode networking (slirp)
   DEBUG_PRINTLN(F("initC: QEMU mode - skipping ETH.begin() hardware initialization"));
   successfullyConfiguredEthernet = true;