Context Navigation

Switch to source view

Ethernet

Ethernet

class Ethernet : public Base

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);
    }
}

Ethernet	An ethernet interface, to use with the ethernet pins.
Functions
Ethernet	Initialise the ethernet interface.
Ethernet	Powers the hardware down.
write	Writes into an outgoing ethernet packet.
send	Send an outgoing ethernet packet.
receive	Recevies an arrived ethernet packet.
read	Read from an recevied ethernet packet.
address	Gives the ethernet address of the mbed.
link	Returns if an ethernet link is pressent or not.
set_link	Sets the speed and duplex parameters of an ethernet link

Functions

Ethernet

Ethernet()

Initialise the ethernet interface.

Ethernet

virtual ~Ethernet()

Powers the hardware down.

write

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.

Variables

data	An array to write.
size	The size of data.

Returns

The number of written bytes.

send

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.
1	If the package is successfully sent.

receive

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. The size of the arrived packet.

read

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.

address

void address( char * mac )

Gives the ethernet address of the mbed.

Variables

mac	Must be a pointer to a 6 byte char array to copy the ethernet address in.

link

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");
    }
}

set_link

void set_link( Mode mode )

Sets the speed and duplex parameters of an ethernet link

Variables

mode	the speed and duplex mode to set the link to:

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

class Ethernet : public Base

An ethernet interface, to use with the ethernet pins.

Ethernet()

Initialise the ethernet interface.

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