Add Comm Fallback

NewExtInst_Zynq_Net/src/main.c

@@ -35,12 +35,6 @@
 #endif
 
 #include "xil_cache.h"
-
-#include "GPIO_Driv.h"
-#include "SPI_Driv.h"
-#include "cal_meas.h"
-#include "uart_IO.h"
-
 #include "lwip/tcp.h"
 extern void tcp_tmr(void);  /* declared in tcp_priv.h, not in public tcp.h */
 #include "xil_cache.h"
@@ -49,6 +43,12 @@ extern void tcp_tmr(void);  /* declared in tcp_priv.h, not in public tcp.h */
 	#include "lwip/dhcp.h"
 #endif
 
+#include "GPIO_Driv.h"
+#include "SPI_Driv.h"
+#include "cal_meas.h"
+#include "uart_IO.h"
+#include "lwip_server.h"
+
 u8 recvbuffer[1024] = {0};
 
 /* defined by each RAW mode application */
@@ -84,6 +84,17 @@ void print_ip_settings(ip_addr_t *ip, ip_addr_t *mask, ip_addr_t *gw)
 	print_ip("Gateway : ", gw);
 }
 
+static int net_is_available(void)
+{
+	if (echo_netif == NULL)
+		return 0;
+	if (!netif_is_up(echo_netif))
+		return 0;
+	if (echo_netif->ip_addr.addr == 0)
+		return 0;
+	return 1;
+}
+
 int main()
 {
 	int iMainCom = 1;
@@ -150,8 +161,18 @@ int main()
 
 	print_ip_settings(&ipaddr, &netmask, &gw);
 
+	/* start the application (web server, rxtest, txtest, etc..) */
+	start_application();
+
 //LWIP Related Init END
-	xil_printf("=====================\r\n[I] System Init Done!\r\n");
+
+	/* Check if network is actually available, fallback to UART if not */
+	if (!net_is_available()) {
+		xil_printf("[W] Network unavailable, falling back to UART\r\n");
+		iMainCom = 0;
+	}
+
+	xil_printf("=====================\r\n[I] System Init Done!=====================\r\n");
 
 	
 	
@@ -170,12 +191,7 @@ int main()
 	interface_initial(CPLD_U2);
 	interface_initial(CPLD_U3);
 
-
+	xil_printf("\r\n=====================[I] Board Init Complete!\r\n=====================[I] Waiting for Command...\r\n");
-
-	xil_printf("[I] Board Init Complete!\r\n[I] Waiting for Command...\r\n");
-
-	/* start the application (web server, rxtest, txtest, etc..) */
-	start_application();
 
 	/* receive and process Instructions */
 	if (iMainCom == 1)