Revision 0:c1be031ca851, committed 2010-06-18

Comitter:

darran

Date:

Fri Jun 18 09:09:57 2010 +0000

Commit message:

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AutoDiscoveryBroadcaster.cpp	Fri Jun 18 09:09:57 2010 +0000
@@ -0,0 +1,38 @@
+#include "AutoDiscoveryBroadcaster.h"
+
+AutoDiscoveryBroadcaster::AutoDiscoveryBroadcaster() {
+    running = 0;
+    // Create the UDP socket
+    udpSock = new UDPSocket;
+}
+
+AutoDiscoveryBroadcaster::~AutoDiscoveryBroadcaster() {
+    stop();
+    udpSock->close();
+    // Delete the UDP socket
+    delete udpSock;
+}
+
+void AutoDiscoveryBroadcaster::start(int udpPort, int period) {
+    if ( !running ) {
+        msg.init();
+        udpSock->bind(Host(IP_ADDR_ANY, udpPort));
+        host = Host(IP_ADDR_BROADCAST, udpPort);
+        //host = Host(IpAddr(192,168,1,141), udpPort);
+        ticker.attach(this, &AutoDiscoveryBroadcaster::broadcast, period);
+        running = 1;
+        // call once now
+        broadcast();
+    }
+}
+
+void AutoDiscoveryBroadcaster::stop() {
+    if ( running ) {
+        ticker.detach();
+        running = 0;
+    }
+}
+
+void AutoDiscoveryBroadcaster::broadcast() {
+    printf("Sending result = %d\r\n", udpSock->sendto(msg.getBytes(), msg.getLength(), &host));
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AutoDiscoveryBroadcaster.h	Fri Jun 18 09:09:57 2010 +0000
@@ -0,0 +1,54 @@
+#ifndef AUTO_DISCOVERY_BROADCASTER_H
+#define AUTO_DISCOVERY_BROADCASTER_H
+
+#include "mbed.h"
+#include "UDPSocket.h"
+#include "BroadcastMessage.h"
+
+/*
+    Class: AutoDiscoveryBroadcaster
+    Periodically sends out hostname
+    and IP address on UDP port 2010
+*/
+class AutoDiscoveryBroadcaster {
+public:
+    // Constructor: AutoDiscoveryBroadcaster
+    // Creates the UDP sockets
+    AutoDiscoveryBroadcaster();
+    // Destructor: ~AutoDiscoveryBroadcaster
+    // Deletes the UDP socket
+    ~AutoDiscoveryBroadcaster();
+    /*
+        Function: start
+        Starts periodically sending out the information datagrams
+        Parameters:
+            udpPort - The UDP port to send on (default 2010)
+            period  - The period between broadcasts
+     */
+    void start(int udpPort=2010, int period=5);
+    /*
+        Function: stop
+        Stops sending out the information datagrams
+     */
+    void stop();
+private:
+    // Variable: udpSock
+    // The UDP socket
+    UDPSocket* udpSock;
+    // Variable: running
+    // Flag to indicate whether we're running or not
+    char running;
+    // Variable: ticker
+    // Ticker used to periodically call broadcast()
+    Ticker ticker;
+    Host host;
+    
+    // Function: broadcast
+    // The method that actually broadcasts the information
+    // about this mbed
+    void broadcast();
+    
+    BroadcastMessage msg;
+};
+
+#endif

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BroadcastMessage.cpp	Fri Jun 18 09:09:57 2010 +0000
@@ -0,0 +1,26 @@
+#include "BroadcastMessage.h"
+
+BroadcastMessage::BroadcastMessage() {
+}
+
+BroadcastMessage::~BroadcastMessage() {
+}
+
+void BroadcastMessage::init() {
+    NetIf* netIf = Net::getDefaultIf();
+    IpAddr ip = netIf->getIp();
+    len = sprintf(buff, 
+        "mbed microcontroller\r\n"
+        "IP: %d.%d.%d.%d!\r\n"
+        "Service: CANWIFI\r\n",
+        ip[0], ip[1], ip[2], ip[3]
+    );
+}
+
+char* BroadcastMessage::getBytes() {
+    return buff;
+}
+
+int BroadcastMessage::getLength() {
+    return len;
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BroadcastMessage.h	Fri Jun 18 09:09:57 2010 +0000
@@ -0,0 +1,31 @@
+#ifndef BROADCAST_MESSAGE_H
+#define BROADCAST_MESSAGE_H
+
+#include "mbed.h"
+#include "UDPSocket.h"
+
+/*
+    Class: AutoDiscoveryBroadcaster
+    Periodically sends out hostname
+    and IP address on UDP port 2010
+*/
+class BroadcastMessage {
+public:
+    // Constructor: AutoDiscoveryBroadcaster
+    // Creates the UDP sockets
+    BroadcastMessage();
+    // Destructor: ~AutoDiscoveryBroadcaster
+    // Deletes the UDP socket
+    ~BroadcastMessage();
+    void init();
+    // Function: getBytes
+    // Returns the message to transmit
+    char* getBytes();
+    int getLength();
+private:
+    char buff[1024];
+    int len;
+};
+ 
+#endif
+ 
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EthernetNetIf.lib	Fri Jun 18 09:09:57 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/donatien/code/EthernetNetIf/#bc7df6da7589

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jun 18 09:09:57 2010 +0000
@@ -0,0 +1,53 @@
+/*
+ * Auto Discovery
+ * Broadcasts information about this mbed on port 2010
+ * Enables other devices on the same network to find it
+ */
+
+#define LWIP_NETIF_HOSTNAME "mbed_dms"
+
+#include "mbed.h"
+#include "EthernetNetIf.h"
+
+#include "AutoDiscoveryBroadcaster.h"
+
+// Our Ethernet interface
+EthernetNetIf eth;
+// Static IP address information
+/*
+EthernetNetIf eth(
+  IpAddr(192,168,1,158), //IP Address
+  IpAddr(255,255,255,0), //Network Mask
+  IpAddr(192,168,1,254), //Gateway
+  IpAddr(192,168,1,2)    //DNS
+);
+*/
+// Our AutoDiscoveryBroadcaster server
+AutoDiscoveryBroadcaster adb;
+
+/*
+    Function: main
+    
+    Sets up the Ethernet interface using DHCP, sets
+    up the AutoDiscoveryBroadcaster which then
+    fires out UDP datagrams with info about the mbed
+*/
+int main() {
+
+    printf("\r\nSetting up...\r\n");
+    EthernetErr ethErr = eth.setup();
+    if (ethErr) {
+        printf("Error %d in setup on DHCP.\r\n", ethErr);
+        return -1;
+    }
+    printf("Trying to get IP address\r\n");
+    IpAddr ip = eth.getIp();
+    printf("mbed IP Address is %d.%d.%d.%d\r\n", ip[0], ip[1], ip[2], ip[3]);
+
+    adb.start();
+
+    printf("Entering while loop Net::poll()ing\r\n");
+    while (1) {
+        Net::poll();
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Jun 18 09:09:57 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/029aa53d7323