Alex Austin

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8 years ago.

Ethernet on the Nucleo stm32f767zi

I'm in able to get the Ethernet demo to work. it doesn't seams to fail at the eth.connect() any ideas?

Question relating to:

Last updated: 20 Apr 2021
STM32 Nucleo-144 development board with STM32F767ZIT6 MCU, supports Arduino, ST Zio and morpho connectivity

1 Answer

Seth King
8 years ago.

I was able to get it working with this code below. I used the python scripts to send and receive the data from the board. Use the latest mbed-os 5.2

ethernet support

#include "mbed.h"
#include "lwip-interface/EthernetInterface.h"

#include <string>
DigitalOut led1(LED1);


using std::string;
const int BROADCAST_PORT_T = 58080;
const int BROADCAST_PORT_R = 58081;
EthernetInterface eth;



void transmit()
{
    UDPSocket socket(&eth);
    string out_buffer = "very important data";
    SocketAddress transmit("192.168.1.159", BROADCAST_PORT_T);

    while (true)
    {
        int ret = socket.sendto(transmit, out_buffer.c_str(), out_buffer.size());
        printf("sendto return: %d\n", ret);

        Thread::wait(5000);
    }
}

void receive()
{
    SocketAddress receive;
    UDPSocket socket(&eth);
    int bind = socket.bind(BROADCAST_PORT_R);
    printf("bind return: %d\n", bind);

    char buffer[256];
    while (true)
    {
        printf("\nWait for packet...\n");
        int n = socket.recvfrom(&receive, buffer, sizeof(buffer));
        buffer[n] = '\0';
        printf("Packet from \"%s\": %s\n", receive.get_ip_address(), buffer);

        Thread::wait(500);
    }
}


int main()
{
    Thread transmitter;
    Thread receiver;
    eth.connect();

    printf("Controller IP Address is %s\r\n", eth.get_ip_address());
    Thread::wait(5000);

    transmitter.start(transmit);
    receiver.start(receive);

    while (true)
    {
        led1 = !led1;
        Thread::wait(500);
    }
}

I'll give it a try later have you got the complete project I can just open?

posted by Alex Austin 15 Dec 2016

This is based on the blinky example so get that working and copy this code over the blinky main.

posted by Seth King 15 Dec 2016

I've tried this but it still returns an error on eth.connect()

posted by Alex Austin 15 Dec 2016