Diff: main.cpp

Revision:

0:3527566e031c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Dec 01 14:11:05 2016 +0000
@@ -0,0 +1,119 @@
+/*------------------------------------------------------------------------------------*/
+/*  Ethernet UDP Client (to be used with Ethernet_UDP_server)                         */
+/*------------------------------------------------------------------------------------*/
+
+/*--COMPANY-----AUTHOR------DATE------------REVISION----NOTES-------------------------*/
+/*  NXP         mareikeFSL  2015.12.23      rev 1.0     initial                       */
+/*                                                                                    */
+/*------------------------------------------------------------------------------------*/
+/*  This "Hello World" program is used in conjunction with the Ethernet_UDP_server    */
+/*  program. It communicates between two FRDM-K64F boards via the Ethernet protocol.  */
+/*  To use this program, you need to do the following:                                */
+/*      - Connect an Ethernet cable between two FRDM-K64F boards (a crossover cable   */
+/*        is not required).                                                           */
+/*      - Flash one board with Ethernet_UDP_client and the other with                 */
+/*        Ethernet_UDP_server                                                         */
+/*      - [optional] If you would like to see the "Hello World" output on your        */
+/*        monitor, install and open a terminal. Tera Term is used in the Wiki for     */
+/*        this program.                                                               */
+/*------------------------------------------------------------------------------------*/
+
+
+/*--INCLUDES----------------------------------------------------------------------------*/
+#include "mbed.h"
+#include "EthernetInterface.h"
+ 
+
+/*--DEFINES-----------------------------------------------------------------------------*/
+
+
+
+/*--CONSTANTS---------------------------------------------------------------------------*/
+const int PORT = 7;
+
+static const char* SERVER_IP = "192.168.1.101"; //IP of server board
+static const char* CLIENT_IP = "192.168.1.102"; //IP of client board
+static const char* MASK = "255.255.255.0";      //mask
+static const char* GATEWAY = "192.168.1.1";     //gateway
+
+
+/*--INITS-------------------------------------------------------------------------------*/
+Serial pc(USBTX, USBRX);        //create PC interface
+EthernetInterface eth;          //create ethernet
+UDPSocket sock;                 //creat Ethernet socket
+Endpoint server;                //create endpoint
+
+DigitalOut red(LED_RED);        //debug led
+DigitalOut green(LED_GREEN);    //debug led
+
+
+/*--VARIABLES---------------------------------------------------------------------------*/
+int n;                  //size of received message
+char in_buffer[1];      //create receive buffer
+char counter[1] = {0};  //sample send buffer
+
+
+/*--FUNCTION DECLARATIONS---------------------------------------------------------------*/
+void init_usb(void);    //initializes pc.printf if required
+void init_eth(void);    //initializes Ethernet
+void end_eth(void);     //closes Ethernet socket
+int main(void);         //main
+
+
+/*--FUNCTION DEFINITIONS----------------------------------------------------------------*/
+
+/*****************************************************************************INIT_USB***/
+void init_usb(void)
+{
+    pc.baud(9600);    //baud
+    
+}   //end init_usb()
+
+/*****************************************************************************INIT_ETH***/
+void init_eth(void)
+{
+    eth.init(CLIENT_IP, MASK, GATEWAY);                                         //set up IP
+    eth.connect();                                                              //connect ethernet
+    pc.printf("\nCLIENT - Client IP Address is %s\r\n", eth.getIPAddress());    //get client IP address
+    
+    sock.init();                                                                //initialize socket
+    
+    server.set_address(SERVER_IP, PORT);                                        //set address of server
+    
+}   //end init_eth()
+
+/******************************************************************************END_ETH***/
+void end_eth(void)
+{
+    sock.close();       //close socket
+    eth.disconnect();   //close Ethernet
+    
+}   //end end_eth()
+
+/*********************************************************************************MAIN***/
+int main(void)
+{
+    red = 0;                                                                                //client
+    green = 1;
+        
+    init_usb();                                                                             //initialize the PC interface
+    init_eth();                                                                             //initialize the Ethernet connection
+
+    while(true)                                                                             //repeat forever
+    {
+        pc.printf("\nCLIENT - Sending '%i' to server %s\r\n", counter[0], SERVER_IP);       //print message to send
+        sock.sendTo(server, counter, sizeof(counter));                                      //send message
+        
+        pc.printf("CLIENT - Waiting for UDP packet...\r\n");                                //wait for message
+        
+        n = sock.receiveFrom(server, in_buffer, sizeof(in_buffer));                         //receive message from server
+        
+        in_buffer[n] = '\0';                                                                //add \0 to end of message
+        pc.printf("CLIENT - Received '%i' from server %s\r\n", in_buffer[0], SERVER_IP);    //print message received
+        
+        counter[0] = (counter[0] + 1)%11;                                                   //only count up to 10, then reset to 0
+        
+        wait(1);                                                                            //wait 1 second
+    }
+    
+}   //end main()