topic Re: LPC4330 Xplorer Board aborted the connection via lwIP in LPC Microcontrollers

LPC4330 Xplorer Board aborted the connection via lwIP

eugenr — Wed, 07 Jun 2017 11:58:04 GMT

I'm trying to connect the LPC4330 Xplorer Board to my computer via ethernet TCP/IP. The board is the Client, which supposed to send data to my computer, which is the server, which I programmed with python.

This is the python server:

import socket
import sys

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
   s.bind(('134.28.56.14', 12693))
except socket.error as msg:
   print("{}".format(str(msg)))
   sys.exit()
s.listen(1)
try:
   while True:
      conn, addr = a.accept()
      while True:
         data = conn.recv(1024)
         if not data:
            conn.close()
            break
finally:
   s.close()‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

I am using lwIP and netconn_connect() always returns ERR_ABRT, which makes no sense to me since it is the right port and the correct IP Adress which I am using.

This is the conection part:

static void tcpTxThread( void *arg )
{
struct netconn *out;
 err_t err;
 ip_addr_t connectIP;
 portTickType lastWakeTime;
uint8_t sendBuffer[ 1500 ];
 struct netbuf *netBuffer;
 size_t sendSize = 0;
 uint16_t lengthOfData = 0;
char *pcRxString;
LWIP_UNUSED_ARG( arg );
/* Create new connection identifier. */
 out = netconn_new( NETCONN_TCP );
/* bind connection to port 10 */
 netconn_bind( out , NULL , LOCAL_PORT );
/* Set the IP address from the server for the connection */
 IP4_ADDR( &connectIP, 134, 28, 56, 14);

 while( 1 ) {/* Try to connect to the server */
    err = netconn_connect( out , &connectIP , SERVER_PORT );
    if( err == ERR_OK )
       break;
    else {/* If the connection could not be established, rebind the netconn-interface and try again */
       netconn_close( out );
       netconn_delete( out );
       out = netconn_new( NETCONN_TCP );
       netconn_bind( out , NULL , LOCAL_PORT );
       }
   /* Try again every 50 milliseconds */
    vTaskDelay( 50 );
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Thanks in andvance for help.

Re: LPC4330 Xplorer Board aborted the connection via lwIP

jeremyzhou — Fri, 09 Jun 2017 02:02:22 GMT

Hi eugenr,

Thank you for your interest in NXP Semiconductor products and

the opportunity to serve you.

To provide the fastest possible support, I'd highly recommend you to refer to the Lwip demos in the LPCOpen library to view the details.

Have a great day,

TIC

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Re: LPC4330 Xplorer Board aborted the connection via lwIP

eugenr — Sat, 10 Jun 2017 12:58:04 GMT

Hi jeremyzhou,

I did it already and I have an equal system already running on the raspberry pi. That is also why I am so confused about it. The only difference between those two are that I wrote the server program on the computer with python and on the raspberry pi its made with C.

Have a great day.

Re: LPC4330 Xplorer Board aborted the connection via lwIP

jeremyzhou — Mon, 12 Jun 2017 06:01:36 GMT

Hi eugenr,

Thanks for your reply.

Whether you use some softwares likes the Wireshark to exemplify communication between the client and server.

I think it's good method to figure the root cause of the issue.
Have a great day,
TIC