Zhengguo Sheng / Mbed 2 deprecated exe5_3_Ethernet_UDP_server

Exercise 5: Ethernet

Dependencies:   EthernetInterface mbed-rtos mbed

main.cpp@0:86b7ebac3e60, 2016-12-01 (annotated)

Committer:
steveshun
Date:
Thu Dec 01 14:12:26 2016 +0000
Revision:
0:86b7ebac3e60
Exercise 5: Ethernet

Who changed what in which revision?

UserRevisionLine numberNew contents of line
steveshun 0:86b7ebac3e60 1 /*------------------------------------------------------------------------------------*/
steveshun 0:86b7ebac3e60 2 /* Ethernet UDP Server (to be used with Ethernet_UDP_client) */
steveshun 0:86b7ebac3e60 3 /*------------------------------------------------------------------------------------*/
steveshun 0:86b7ebac3e60 4
steveshun 0:86b7ebac3e60 5 /*--COMPANY-----AUTHOR------DATE------------REVISION----NOTES-------------------------*/
steveshun 0:86b7ebac3e60 6 /* NXP mareikeFSL 2015.12.23 rev 1.0 initial */
steveshun 0:86b7ebac3e60 7 /* */
steveshun 0:86b7ebac3e60 8 /*------------------------------------------------------------------------------------*/
steveshun 0:86b7ebac3e60 9 /* This "Hello World" program is used in conjunction with the Ethernet_UDP_client */
steveshun 0:86b7ebac3e60 10 /* program. It communicates between two FRDM-K64F boards via the Ethernet protocol. */
steveshun 0:86b7ebac3e60 11 /* To use this program, you need to do the following: */
steveshun 0:86b7ebac3e60 12 /* - Connect an Ethernet cable between two FRDM-K64F boards (a crossover cable */
steveshun 0:86b7ebac3e60 13 /* is not required). */
steveshun 0:86b7ebac3e60 14 /* - Flash one board with Ethernet_UDP_client and the other with */
steveshun 0:86b7ebac3e60 15 /* Ethernet_UDP_server */
steveshun 0:86b7ebac3e60 16 /* - [optional] If you would like to see the "Hello World" output on your */
steveshun 0:86b7ebac3e60 17 /* monitor, install and open a terminal. Tera Term is used in the Wiki for */
steveshun 0:86b7ebac3e60 18 /* this program. */
steveshun 0:86b7ebac3e60 19 /*------------------------------------------------------------------------------------*/
steveshun 0:86b7ebac3e60 20
steveshun 0:86b7ebac3e60 21
steveshun 0:86b7ebac3e60 22 /*--INCLUDES----------------------------------------------------------------------------*/
steveshun 0:86b7ebac3e60 23 #include "mbed.h"
steveshun 0:86b7ebac3e60 24 #include "EthernetInterface.h"
steveshun 0:86b7ebac3e60 25
steveshun 0:86b7ebac3e60 26
steveshun 0:86b7ebac3e60 27 /*--DEFINES-----------------------------------------------------------------------------*/
steveshun 0:86b7ebac3e60 28
steveshun 0:86b7ebac3e60 29
steveshun 0:86b7ebac3e60 30
steveshun 0:86b7ebac3e60 31 /*--CONSTANTS---------------------------------------------------------------------------*/
steveshun 0:86b7ebac3e60 32 const int PORT = 7; //arbitrary port
steveshun 0:86b7ebac3e60 33
steveshun 0:86b7ebac3e60 34 static const char* SERVER_IP = "192.168.1.101"; //IP of server board
steveshun 0:86b7ebac3e60 35 static const char* MASK = "255.255.255.0"; //mask
steveshun 0:86b7ebac3e60 36 static const char* GATEWAY = "192.168.1.1"; //gateway
steveshun 0:86b7ebac3e60 37
steveshun 0:86b7ebac3e60 38
steveshun 0:86b7ebac3e60 39 /*--INITS-------------------------------------------------------------------------------*/
steveshun 0:86b7ebac3e60 40 Serial pc(USBTX, USBRX); //create PC interface
steveshun 0:86b7ebac3e60 41 EthernetInterface eth; //create ethernet
steveshun 0:86b7ebac3e60 42 UDPSocket server; //creat server
steveshun 0:86b7ebac3e60 43 Endpoint client; //create endpoint
steveshun 0:86b7ebac3e60 44
steveshun 0:86b7ebac3e60 45 DigitalOut red(LED_RED); //debug led
steveshun 0:86b7ebac3e60 46 DigitalOut green(LED_GREEN); //debug led
steveshun 0:86b7ebac3e60 47
steveshun 0:86b7ebac3e60 48
steveshun 0:86b7ebac3e60 49 /*--VARIABLES---------------------------------------------------------------------------*/
steveshun 0:86b7ebac3e60 50 int n; //size of received message
steveshun 0:86b7ebac3e60 51 char counter[1] = {0}; //sample receive/send buffer
steveshun 0:86b7ebac3e60 52
steveshun 0:86b7ebac3e60 53
steveshun 0:86b7ebac3e60 54 /*--FUNCTION DECLARATIONS---------------------------------------------------------------*/
steveshun 0:86b7ebac3e60 55 void init_usb(void); //initializes pc.printf if required
steveshun 0:86b7ebac3e60 56 void init_eth(void); //initializes Ethernet
steveshun 0:86b7ebac3e60 57 void receive(void); //receives packets
steveshun 0:86b7ebac3e60 58 int main(void); //main
steveshun 0:86b7ebac3e60 59
steveshun 0:86b7ebac3e60 60
steveshun 0:86b7ebac3e60 61 /*--FUNCTION DEFINITIONS----------------------------------------------------------------*/
steveshun 0:86b7ebac3e60 62
steveshun 0:86b7ebac3e60 63 /*****************************************************************************INIT_USB***/
steveshun 0:86b7ebac3e60 64 void init_usb(void)
steveshun 0:86b7ebac3e60 65 {
steveshun 0:86b7ebac3e60 66 pc.baud(9600); //baud
steveshun 0:86b7ebac3e60 67
steveshun 0:86b7ebac3e60 68 } //end init_usb()
steveshun 0:86b7ebac3e60 69
steveshun 0:86b7ebac3e60 70 /*****************************************************************************INIT_ETH***/
steveshun 0:86b7ebac3e60 71 void init_eth(void)
steveshun 0:86b7ebac3e60 72 {
steveshun 0:86b7ebac3e60 73 eth.init(SERVER_IP, MASK, GATEWAY); //set up IP
steveshun 0:86b7ebac3e60 74 eth.connect(); //connect ethernet
steveshun 0:86b7ebac3e60 75 pc.printf("\nSERVER - Server IP Address is %s\r\n", eth.getIPAddress()); //get server IP address;
steveshun 0:86b7ebac3e60 76
steveshun 0:86b7ebac3e60 77 server.bind(PORT); //bind server
steveshun 0:86b7ebac3e60 78
steveshun 0:86b7ebac3e60 79 } //end init_eth()
steveshun 0:86b7ebac3e60 80
steveshun 0:86b7ebac3e60 81 /******************************************************************************RECEIVE***/
steveshun 0:86b7ebac3e60 82 void receive(void)
steveshun 0:86b7ebac3e60 83 {
steveshun 0:86b7ebac3e60 84 pc.printf("\nSERVER - Waiting for UDP packet...\r\n"); //wait for packet
steveshun 0:86b7ebac3e60 85 n = server.receiveFrom(client, counter, sizeof(counter)); //receive message from client
steveshun 0:86b7ebac3e60 86 counter[n] = '\0'; //add \0 to end of message
steveshun 0:86b7ebac3e60 87
steveshun 0:86b7ebac3e60 88 pc.printf("SERVER - Received '%i' from client %s\r\n", counter[0], client.get_address()); //print message and client
steveshun 0:86b7ebac3e60 89 pc.printf("SERVER - Sending '%i' back to client %s\r\n", counter[0], client.get_address()); //print sending back
steveshun 0:86b7ebac3e60 90 server.sendTo(client, counter, n); //send message
steveshun 0:86b7ebac3e60 91
steveshun 0:86b7ebac3e60 92 } //end receive()
steveshun 0:86b7ebac3e60 93
steveshun 0:86b7ebac3e60 94 /*********************************************************************************MAIN***/
steveshun 0:86b7ebac3e60 95 int main(void)
steveshun 0:86b7ebac3e60 96 {
steveshun 0:86b7ebac3e60 97 red = 1;
steveshun 0:86b7ebac3e60 98 green = 0; //server
steveshun 0:86b7ebac3e60 99
steveshun 0:86b7ebac3e60 100 init_usb(); //initialize the PC interface
steveshun 0:86b7ebac3e60 101 init_eth(); //initialize the Ethernet connection
steveshun 0:86b7ebac3e60 102
steveshun 0:86b7ebac3e60 103 while (true) //repeat forever
steveshun 0:86b7ebac3e60 104 {
steveshun 0:86b7ebac3e60 105 receive(); //wait for message
steveshun 0:86b7ebac3e60 106 }
steveshun 0:86b7ebac3e60 107
steveshun 0:86b7ebac3e60 108 } //end main()