This example uses the mbed libraries to check Ethernet TCP Echo Server Example. It was tested successfully with K64F.

Dependencies:   EthernetInterface mbed-rtos mbed

Fork of FRDM_K64F-Ethernet by Rangel Alvarado

Revision:
1:f4d12640cd54
Parent:
0:bbc9cfdee3bc
--- a/main.cpp	Mon Sep 22 02:34:12 2014 +0000
+++ b/main.cpp	Tue Sep 29 14:50:45 2015 +0000
@@ -1,29 +1,32 @@
 #include "mbed.h"
 #include "EthernetInterface.h"
  
-#define MBED_DEV_IP       "192.168.0.52"
-#define MBED_DEV_MASK     "255.255.255.0"
-#define MBED_DEV_GW       "0.0.0.0"
+#define MBED_DEV_IP       "172.16.3.100"
+#define MBED_DEV_MASK     "255.255.0.0"
+#define MBED_DEV_GW       "172.16.0.254"
 #define ECHO_SERVER_PORT   5000
 
+Serial PC(USBTX,USBRX);
  
 int main (void) {
     EthernetInterface eth;
+    PC.baud(9600);
+    PC.printf("K64F is alive!!!\r\n");
     eth.init(MBED_DEV_IP, MBED_DEV_MASK, MBED_DEV_GW); //Assign a device ip, mask and gateway
     eth.connect();
-    printf("IP Address is %s\n", eth.getIPAddress());
+    PC.printf("IP Address is %s\r\n", eth.getIPAddress());
     
     TCPSocketServer server;
     server.bind(ECHO_SERVER_PORT);
     server.listen();
     
     while (true) {
-        printf("\nWait for new connection...\n");
+        PC.printf("Wait for new connection...\r\n");
         TCPSocketConnection client;
         server.accept(client);
-        client.set_blocking(false, 1500); // Timeout after (1.5)s
+        client.set_blocking(false, 5000); // Timeout after (5)s
         
-        printf("Connection from: %s\n", client.get_address());
+        PC.printf("Connection from: %s\r\n", client.get_address());
         char buffer[256];
         while (true) {
             int n = client.receive(buffer, sizeof(buffer));