Ben Schueler / Mbed 2 deprecated UDPSocket_Node

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Dependencies:   EthernetNetIf NTPClient_NetServices mbed

UDPSocketExample.cpp@1:2e2d0b0b57e0, 2010-11-24 (annotated)

Committer:
Schueler
Date:
Wed Nov 24 23:32:52 2010 +0000
Revision:
1:2e2d0b0b57e0
Parent:
0:c111a981bfb8
Child:
2:ae37f80efd23
0.02

added automatic mbed ID mechanism.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Schueler 0:c111a981bfb8 1 #include "mbed.h"
Schueler 0:c111a981bfb8 2 #include "EthernetNetIf.h"
Schueler 0:c111a981bfb8 3 #include "UDPSocket.h"
Schueler 0:c111a981bfb8 4
Schueler 0:c111a981bfb8 5 Serial pc(USBTX, USBRX);
Schueler 0:c111a981bfb8 6 EthernetNetIf eth;
Schueler 0:c111a981bfb8 7 UDPSocket udp;
Schueler 0:c111a981bfb8 8 DigitalOut led(LED1);
Schueler 0:c111a981bfb8 9 InterruptIn button(p5);
Schueler 1:2e2d0b0b57e0 10 Ticker AliveTicker;
Schueler 0:c111a981bfb8 11
Schueler 1:2e2d0b0b57e0 12 // xxx will be replaced by LSByte of the IP address
Schueler 1:2e2d0b0b57e0 13 //
Schueler 0:c111a981bfb8 14 // Message to let the other know we are alive
Schueler 1:2e2d0b0b57e0 15 char strAlive[15];
Schueler 0:c111a981bfb8 16 // Address other MBED to turn on the LED
Schueler 1:2e2d0b0b57e0 17 const char* strON = "MBED yyy LED ON \0";
Schueler 1:2e2d0b0b57e0 18 const char* strOFF = "MBED yyy LED OFF \0";
Schueler 1:2e2d0b0b57e0 19 char mebed_list[16];
Schueler 1:2e2d0b0b57e0 20
Schueler 1:2e2d0b0b57e0 21 char ButtonPressed = 0;
Schueler 1:2e2d0b0b57e0 22 char SendAlive = 0;
Schueler 1:2e2d0b0b57e0 23 char mbed_id = 0;
Schueler 0:c111a981bfb8 24
Schueler 1:2e2d0b0b57e0 25 void Alive() // ticker routine
Schueler 1:2e2d0b0b57e0 26 {
Schueler 1:2e2d0b0b57e0 27 SendAlive = 1;
Schueler 1:2e2d0b0b57e0 28 }
Schueler 1:2e2d0b0b57e0 29
Schueler 1:2e2d0b0b57e0 30 void button_pressed() // irq routine for button
Schueler 1:2e2d0b0b57e0 31 {
Schueler 1:2e2d0b0b57e0 32 ButtonPressed = 1;
Schueler 0:c111a981bfb8 33 }
Schueler 0:c111a981bfb8 34
Schueler 0:c111a981bfb8 35
Schueler 0:c111a981bfb8 36 void onUDPSocketEvent(UDPSocketEvent e)
Schueler 0:c111a981bfb8 37 {
Schueler 0:c111a981bfb8 38 switch(e)
Schueler 0:c111a981bfb8 39 {
Schueler 0:c111a981bfb8 40 case UDPSOCKET_READABLE: //The only event for now
Schueler 0:c111a981bfb8 41 char buf[64] = {0};
Schueler 0:c111a981bfb8 42 Host host;
Schueler 0:c111a981bfb8 43 while( int len = udp.recvfrom( buf, 63, &host ) )
Schueler 0:c111a981bfb8 44 {
Schueler 0:c111a981bfb8 45 if( len <= 0 )
Schueler 0:c111a981bfb8 46 break;
Schueler 0:c111a981bfb8 47
Schueler 0:c111a981bfb8 48 // should implement a parser...
Schueler 0:c111a981bfb8 49 // but this will do the trick for the moment
Schueler 0:c111a981bfb8 50 if ( strncmp ( buf, "MBED", 4 ) == 0 )
Schueler 0:c111a981bfb8 51 {
Schueler 1:2e2d0b0b57e0 52 //pc.printf ("message from %d.%d.%d.%d: %s\n", host.getIp()[0], host.getIp()[1], host.getIp()[2], host.getIp()[3], buf );
Schueler 0:c111a981bfb8 53
Schueler 0:c111a981bfb8 54 int mbed_client = 0;
Schueler 1:2e2d0b0b57e0 55 for ( int i = 5; i < 8; i++ )
Schueler 0:c111a981bfb8 56 {
Schueler 1:2e2d0b0b57e0 57 if ( ( buf[i] >= '0' ) & ( buf[i] <= '9' ) ) { mbed_client *=10; mbed_client += ( buf[i] - '0' ); }
Schueler 0:c111a981bfb8 58 }
Schueler 0:c111a981bfb8 59 if ( strstr (buf, "ALIVE") != NULL )
Schueler 0:c111a981bfb8 60 {
Schueler 0:c111a981bfb8 61 pc.printf ("MBED %d is alive\n", mbed_client );
Schueler 0:c111a981bfb8 62 }
Schueler 0:c111a981bfb8 63 if ( strstr (buf, "LED") != NULL )
Schueler 0:c111a981bfb8 64 {
Schueler 1:2e2d0b0b57e0 65 pc.printf ("MBED %d send a message\n", mbed_client );
Schueler 0:c111a981bfb8 66 if ( strstr (buf, "ON") != NULL ) { led = 1; }
Schueler 0:c111a981bfb8 67 if ( strstr (buf, "OFF") != NULL ) { led = 0; }
Schueler 0:c111a981bfb8 68 }
Schueler 0:c111a981bfb8 69 }
Schueler 0:c111a981bfb8 70 }
Schueler 0:c111a981bfb8 71 break;
Schueler 0:c111a981bfb8 72 }
Schueler 0:c111a981bfb8 73 }
Schueler 0:c111a981bfb8 74
Schueler 0:c111a981bfb8 75 int main() {
Schueler 0:c111a981bfb8 76 char pos = 0;
Schueler 0:c111a981bfb8 77 pc.baud(115200);
Schueler 0:c111a981bfb8 78 pc.printf("Ethernet...\n");
Schueler 0:c111a981bfb8 79 EthernetErr ethErr = eth.setup();
Schueler 0:c111a981bfb8 80 if(ethErr)
Schueler 0:c111a981bfb8 81 {
Schueler 1:2e2d0b0b57e0 82 pc.printf("Error %d in setup.\n", ethErr);
Schueler 0:c111a981bfb8 83 return -1;
Schueler 0:c111a981bfb8 84 }
Schueler 1:2e2d0b0b57e0 85 pc.printf(" OK\n\r");
Schueler 0:c111a981bfb8 86
Schueler 1:2e2d0b0b57e0 87 IpAddr ethIp = eth.getIp();
Schueler 1:2e2d0b0b57e0 88 sprintf( strAlive, "MBED %d ALIVE\0", ethIp[3] );
Schueler 1:2e2d0b0b57e0 89 pc.printf( "%s\n\r", strAlive );
Schueler 1:2e2d0b0b57e0 90 // set Alive Broadcast to 10 seconds
Schueler 1:2e2d0b0b57e0 91 AliveTicker.attach(&Alive, 10);
Schueler 0:c111a981bfb8 92 Host multicast(IpAddr(239, 192, 1, 100), 50000, NULL); //Join multicast group on port 50000
Schueler 0:c111a981bfb8 93
Schueler 0:c111a981bfb8 94 udp.setOnEvent(&onUDPSocketEvent);
Schueler 0:c111a981bfb8 95
Schueler 0:c111a981bfb8 96 udp.bind(multicast);
Schueler 0:c111a981bfb8 97
Schueler 1:2e2d0b0b57e0 98 udp.sendto( strAlive, strlen(strAlive), &multicast );
Schueler 0:c111a981bfb8 99
Schueler 0:c111a981bfb8 100 button.rise(&button_pressed);
Schueler 0:c111a981bfb8 101 while(true)
Schueler 0:c111a981bfb8 102 {
Schueler 0:c111a981bfb8 103 Net::poll();
Schueler 1:2e2d0b0b57e0 104 if ( SendAlive == 1 ) { udp.sendto( strAlive, strlen(strAlive), &multicast ); SendAlive = 0; } // Send Alive Signal
Schueler 1:2e2d0b0b57e0 105
Schueler 1:2e2d0b0b57e0 106 if( ButtonPressed != 0 )
Schueler 0:c111a981bfb8 107 {
Schueler 0:c111a981bfb8 108 char strout[20];
Schueler 0:c111a981bfb8 109 pos = !pos;
Schueler 0:c111a981bfb8 110 if ( pos == 0 ) strncpy( strout, strOFF, 17 ); else strncpy( strout, strON, 17 );
Schueler 0:c111a981bfb8 111 udp.sendto( strout, strlen(strout), &multicast );
Schueler 1:2e2d0b0b57e0 112 //pc.printf("%s\n", str);
Schueler 1:2e2d0b0b57e0 113 ButtonPressed = 0;
Schueler 0:c111a981bfb8 114 }
Schueler 0:c111a981bfb8 115 }
Schueler 0:c111a981bfb8 116
Schueler 0:c111a981bfb8 117
Schueler 0:c111a981bfb8 118 }