Zhengguo Sheng / Mbed 2 deprecated exe5_3_Ethernet_UDP_client

Exercise 5: Ethernet

Dependencies:   EthernetInterface mbed-rtos mbed

main.cpp@0:3527566e031c, 2016-12-01 (annotated)

Committer:
steveshun
Date:
Thu Dec 01 14:11:05 2016 +0000
Revision:
0:3527566e031c
Exercise 5: Ethernet

Who changed what in which revision?

UserRevisionLine numberNew contents of line
steveshun 0:3527566e031c 1 /*------------------------------------------------------------------------------------*/
steveshun 0:3527566e031c 2 /* Ethernet UDP Client (to be used with Ethernet_UDP_server) */
steveshun 0:3527566e031c 3 /*------------------------------------------------------------------------------------*/
steveshun 0:3527566e031c 4
steveshun 0:3527566e031c 5 /*--COMPANY-----AUTHOR------DATE------------REVISION----NOTES-------------------------*/
steveshun 0:3527566e031c 6 /* NXP mareikeFSL 2015.12.23 rev 1.0 initial */
steveshun 0:3527566e031c 7 /* */
steveshun 0:3527566e031c 8 /*------------------------------------------------------------------------------------*/
steveshun 0:3527566e031c 9 /* This "Hello World" program is used in conjunction with the Ethernet_UDP_server */
steveshun 0:3527566e031c 10 /* program. It communicates between two FRDM-K64F boards via the Ethernet protocol. */
steveshun 0:3527566e031c 11 /* To use this program, you need to do the following: */
steveshun 0:3527566e031c 12 /* - Connect an Ethernet cable between two FRDM-K64F boards (a crossover cable */
steveshun 0:3527566e031c 13 /* is not required). */
steveshun 0:3527566e031c 14 /* - Flash one board with Ethernet_UDP_client and the other with */
steveshun 0:3527566e031c 15 /* Ethernet_UDP_server */
steveshun 0:3527566e031c 16 /* - [optional] If you would like to see the "Hello World" output on your */
steveshun 0:3527566e031c 17 /* monitor, install and open a terminal. Tera Term is used in the Wiki for */
steveshun 0:3527566e031c 18 /* this program. */
steveshun 0:3527566e031c 19 /*------------------------------------------------------------------------------------*/
steveshun 0:3527566e031c 20
steveshun 0:3527566e031c 21
steveshun 0:3527566e031c 22 /*--INCLUDES----------------------------------------------------------------------------*/
steveshun 0:3527566e031c 23 #include "mbed.h"
steveshun 0:3527566e031c 24 #include "EthernetInterface.h"
steveshun 0:3527566e031c 25
steveshun 0:3527566e031c 26
steveshun 0:3527566e031c 27 /*--DEFINES-----------------------------------------------------------------------------*/
steveshun 0:3527566e031c 28
steveshun 0:3527566e031c 29
steveshun 0:3527566e031c 30
steveshun 0:3527566e031c 31 /*--CONSTANTS---------------------------------------------------------------------------*/
steveshun 0:3527566e031c 32 const int PORT = 7;
steveshun 0:3527566e031c 33
steveshun 0:3527566e031c 34 static const char* SERVER_IP = "192.168.1.101"; //IP of server board
steveshun 0:3527566e031c 35 static const char* CLIENT_IP = "192.168.1.102"; //IP of client board
steveshun 0:3527566e031c 36 static const char* MASK = "255.255.255.0"; //mask
steveshun 0:3527566e031c 37 static const char* GATEWAY = "192.168.1.1"; //gateway
steveshun 0:3527566e031c 38
steveshun 0:3527566e031c 39
steveshun 0:3527566e031c 40 /*--INITS-------------------------------------------------------------------------------*/
steveshun 0:3527566e031c 41 Serial pc(USBTX, USBRX); //create PC interface
steveshun 0:3527566e031c 42 EthernetInterface eth; //create ethernet
steveshun 0:3527566e031c 43 UDPSocket sock; //creat Ethernet socket
steveshun 0:3527566e031c 44 Endpoint server; //create endpoint
steveshun 0:3527566e031c 45
steveshun 0:3527566e031c 46 DigitalOut red(LED_RED); //debug led
steveshun 0:3527566e031c 47 DigitalOut green(LED_GREEN); //debug led
steveshun 0:3527566e031c 48
steveshun 0:3527566e031c 49
steveshun 0:3527566e031c 50 /*--VARIABLES---------------------------------------------------------------------------*/
steveshun 0:3527566e031c 51 int n; //size of received message
steveshun 0:3527566e031c 52 char in_buffer[1]; //create receive buffer
steveshun 0:3527566e031c 53 char counter[1] = {0}; //sample send buffer
steveshun 0:3527566e031c 54
steveshun 0:3527566e031c 55
steveshun 0:3527566e031c 56 /*--FUNCTION DECLARATIONS---------------------------------------------------------------*/
steveshun 0:3527566e031c 57 void init_usb(void); //initializes pc.printf if required
steveshun 0:3527566e031c 58 void init_eth(void); //initializes Ethernet
steveshun 0:3527566e031c 59 void end_eth(void); //closes Ethernet socket
steveshun 0:3527566e031c 60 int main(void); //main
steveshun 0:3527566e031c 61
steveshun 0:3527566e031c 62
steveshun 0:3527566e031c 63 /*--FUNCTION DEFINITIONS----------------------------------------------------------------*/
steveshun 0:3527566e031c 64
steveshun 0:3527566e031c 65 /*****************************************************************************INIT_USB***/
steveshun 0:3527566e031c 66 void init_usb(void)
steveshun 0:3527566e031c 67 {
steveshun 0:3527566e031c 68 pc.baud(9600); //baud
steveshun 0:3527566e031c 69
steveshun 0:3527566e031c 70 } //end init_usb()
steveshun 0:3527566e031c 71
steveshun 0:3527566e031c 72 /*****************************************************************************INIT_ETH***/
steveshun 0:3527566e031c 73 void init_eth(void)
steveshun 0:3527566e031c 74 {
steveshun 0:3527566e031c 75 eth.init(CLIENT_IP, MASK, GATEWAY); //set up IP
steveshun 0:3527566e031c 76 eth.connect(); //connect ethernet
steveshun 0:3527566e031c 77 pc.printf("\nCLIENT - Client IP Address is %s\r\n", eth.getIPAddress()); //get client IP address
steveshun 0:3527566e031c 78
steveshun 0:3527566e031c 79 sock.init(); //initialize socket
steveshun 0:3527566e031c 80
steveshun 0:3527566e031c 81 server.set_address(SERVER_IP, PORT); //set address of server
steveshun 0:3527566e031c 82
steveshun 0:3527566e031c 83 } //end init_eth()
steveshun 0:3527566e031c 84
steveshun 0:3527566e031c 85 /******************************************************************************END_ETH***/
steveshun 0:3527566e031c 86 void end_eth(void)
steveshun 0:3527566e031c 87 {
steveshun 0:3527566e031c 88 sock.close(); //close socket
steveshun 0:3527566e031c 89 eth.disconnect(); //close Ethernet
steveshun 0:3527566e031c 90
steveshun 0:3527566e031c 91 } //end end_eth()
steveshun 0:3527566e031c 92
steveshun 0:3527566e031c 93 /*********************************************************************************MAIN***/
steveshun 0:3527566e031c 94 int main(void)
steveshun 0:3527566e031c 95 {
steveshun 0:3527566e031c 96 red = 0; //client
steveshun 0:3527566e031c 97 green = 1;
steveshun 0:3527566e031c 98
steveshun 0:3527566e031c 99 init_usb(); //initialize the PC interface
steveshun 0:3527566e031c 100 init_eth(); //initialize the Ethernet connection
steveshun 0:3527566e031c 101
steveshun 0:3527566e031c 102 while(true) //repeat forever
steveshun 0:3527566e031c 103 {
steveshun 0:3527566e031c 104 pc.printf("\nCLIENT - Sending '%i' to server %s\r\n", counter[0], SERVER_IP); //print message to send
steveshun 0:3527566e031c 105 sock.sendTo(server, counter, sizeof(counter)); //send message
steveshun 0:3527566e031c 106
steveshun 0:3527566e031c 107 pc.printf("CLIENT - Waiting for UDP packet...\r\n"); //wait for message
steveshun 0:3527566e031c 108
steveshun 0:3527566e031c 109 n = sock.receiveFrom(server, in_buffer, sizeof(in_buffer)); //receive message from server
steveshun 0:3527566e031c 110
steveshun 0:3527566e031c 111 in_buffer[n] = '\0'; //add \0 to end of message
steveshun 0:3527566e031c 112 pc.printf("CLIENT - Received '%i' from server %s\r\n", in_buffer[0], SERVER_IP); //print message received
steveshun 0:3527566e031c 113
steveshun 0:3527566e031c 114 counter[0] = (counter[0] + 1)%11; //only count up to 10, then reset to 0
steveshun 0:3527566e031c 115
steveshun 0:3527566e031c 116 wait(1); //wait 1 second
steveshun 0:3527566e031c 117 }
steveshun 0:3527566e031c 118
steveshun 0:3527566e031c 119 } //end main()