Fávero Santos

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6 years, 3 months ago.

LPC4088 + ethernet interface is not working

Hi, all!

I'm working with an LPC4088 QuickStart Board and using the TCPSocket_HelloWorld - main.cpp from https://os.mbed.com/handbook/Ethernet-Interface.

The code is running Ok, except for the ethernet and socket connections - when using eth.connect(), error -1 is returned. The same applies to sock.connect("os.mbed.com", 80).

Does anyone knows if there's any change I have to code or change to make the ethernet interface work?

Thanks

Ps. Code below.

Fávero

#include "mbed.h"
#include "EthernetInterface.h"

Serial serial_debug(USBTX, USBRX);

int main() {
    EthernetInterface eth;
    int16_t is_connected = 9;
    int16_t is_socketed = 9;
    
    serial_debug.baud(115200);
    serial_debug.printf("\033[2J");
    serial_debug.printf("\r -- Aloha! \n");
    eth.init(); //Use DHCP
    //eth.init("192.168.201.59", "255.255.255.0", "192.168.201.253");

    is_connected = eth.connect(3000); 
    if (is_connected == 0){
        serial_debug.printf("\r -- Connection OK!! \n");
    }else if (is_connected != 0){
        serial_debug.printf("\r -- Connect NOK!! \n");
        serial_debug.printf("\r -- Error code: %d\n", is_connected);
    }
    
    serial_debug.printf("\r -- IP Address is %s\n", eth.getIPAddress());
    TCPSocketConnection sock;
    is_socketed = sock.connect("os.mbed.com", 80);
    serial_debug.printf("\r -- Socket error: %d\n", is_socketed);
    
    char http_cmd[] = "GET /media/uploads/mbed_official/hello.txt HTTP/1.0\n\n";
    sock.send_all(http_cmd, sizeof(http_cmd)-1);
    
    char buffer[300];
    int ret;
    while (true) {
        ret = sock.receive(buffer, sizeof(buffer)-1);
        if (ret <= 0)
            break;
        buffer[ret] = '\0';
        serial_debug.printf("Received %d chars from server:\n%s\n", ret, buffer);
    }
      
    sock.close();
    serial_debug.printf("\r -- Socket closed!\n");
    
    eth.disconnect();
    serial_debug.printf("\r -- Ethernet disconnected!\n");
    
    while(1) {}
}

Hi! I did more research and I found out that error -1 in eth.connect is related to the error ERR_MEM - Out of memory, available in dhcp.c.

posted by Fávero Santos 11 Jan 2018
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