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Ethernet Class Reference

Ethernet Class Reference

An ethernet interface, to use with the ethernet pins. More...

#include <Ethernet.h>

Public Member Functions

 Ethernet ()
 Initialise the ethernet interface.
virtual ~Ethernet ()
 Powers the hardware down.
int write (const char *data, int size)
 Writes into an outgoing ethernet packet.
int send ()
 Send an outgoing ethernet packet.
int receive ()
 Recevies an arrived ethernet packet.
int read (char *data, int size)
 Read from an recevied ethernet packet.
void address (char *mac)
 Gives the ethernet address of the mbed.
int link ()
 Returns if an ethernet link is pressent or not.
void set_link (Mode mode)
 Sets the speed and duplex parameters of an ethernet link.

Detailed Description

An ethernet interface, to use with the ethernet pins.

Example:

 // Read destination and source from every ethernet packet

 #include "mbed.h"

 Ethernet eth;

 int main() {
     char buf[0x600];

     while(1) {
         int size = eth.receive();
         if(size > 0) {
             eth.read(buf, size);
             printf("Destination:  %02X:%02X:%02X:%02X:%02X:%02X\n",
                     buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
             printf("Source: %02X:%02X:%02X:%02X:%02X:%02X\n",
                     buf[6], buf[7], buf[8], buf[9], buf[10], buf[11]);
         }

         wait(1);
     }
 }

Definition at line 53 of file Ethernet.h.


Constructor & Destructor Documentation

Ethernet (  )

Initialise the ethernet interface.

virtual ~Ethernet (  ) [virtual]

Powers the hardware down.


Member Function Documentation

void address ( char *  mac )

Gives the ethernet address of the mbed.

Parameters:
macMust be a pointer to a 6 byte char array to copy the ethernet address in.
int link (  )

Returns if an ethernet link is pressent or not.

It takes a wile after Ethernet initializion to show up.

Returns:
0 if no ethernet link is pressent, 1 if an ethernet link is pressent.

Example:

 // Using the Ethernet link function
 #include "mbed.h"

 Ethernet eth;

 int main() {
     wait(1); // Needed after startup.
     if (eth.link()) {
          printf("online\n");
     } else {
          printf("offline\n");
     }
 }
int read ( char *  data,
int  size 
)

Read from an recevied ethernet packet.

After receive returnd a number bigger than 0it is possible to read bytes from this packet. Read will write up to size bytes into data.

It is possible to use read multible times. Each time read will start reading after the last read byte before.

Returns:
The number of byte read.
int receive (  )

Recevies an arrived ethernet packet.

Receiving an ethernet packet will drop the last received ethernet packet and make a new ethernet packet ready to read. If no ethernet packet is arrived it will return 0.

Returns:
0 if no ethernet packet is arrived, or the size of the arrived packet.
int send (  )

Send an outgoing ethernet packet.

After filling in the data in an ethernet packet it must be send. Send will provide a new packet to write to.

Returns:
0 if the sending was failed, or the size of the packet successfully sent.
void set_link ( Mode  mode )

Sets the speed and duplex parameters of an ethernet link.

  • AutoNegotiate Auto negotiate speed and duplex
  • HalfDuplex10 10 Mbit, half duplex
  • FullDuplex10 10 Mbit, full duplex
  • HalfDuplex100 100 Mbit, half duplex
  • FullDuplex100 100 Mbit, full duplex
Parameters:
modethe speed and duplex mode to set the link to:
int write ( const char *  data,
int  size 
)

Writes into an outgoing ethernet packet.

It will append size bytes of data to the previously written bytes.

Parameters:
dataAn array to write.
sizeThe size of data.
Returns:
The number of written bytes.