Posted on May 03, 2018 at 09:25I am using STM32F4 EVALUATION Board. I want to implement an echo server based on netconn. I did the configuration of ethenret and tcp/ip and lwip. When I ping it works correctly but when type ' C:\>echotool IP_address /p tcp /r 7 /n 15 /t 2 /d Testing LwIP TCP echo server' in the command prompt it shows me this error ' reponse time out ' I did not understand why it is not working ???
when I debug the programm I noticed that the OS by osKernelStart does not call the function of tcpecho_thread that contains the foncions of receiving and sending datas. But it calls all the other thread.. I did not understand why It does not call the thread of tcp echo server.
I used this code for the tcp echo server
/*
* tcp_echoserver.c
*/
//Includes
#include 'DeclarationsCommunes.h'
#if LWIP_TCP
#if LWIP_NETCONN
#include 'lwip/sys.h'
#include 'lwip/api.h'
#define TCPECHO_THREAD_PRIO ( tskIDLE_PRIORITY + 4 )
/*tcpecho_thread function description*/
void tcpecho_thread(void *arg)
{
struct netconn *conn, *newconn;
err_t err, accept_err;
struct netbuf *buf;
void *data;
u16_t len;
LWIP_UNUSED_ARG(arg);
/* Create a new connection identifier. */
conn = netconn_new(NETCONN_TCP);
if (conn!=NULL)
{
/* Bind connection to well known port number 7. */
err = netconn_bind(conn, NULL, 7);
if (err == ERR_OK)
{
/* Tell connection to go into listening mode. */
netconn_listen(conn);
while (1)
{
/* Grab new connection. */
accept_err = netconn_accept(conn, &newconn);
/* Process the new connection. */
if (accept_err == ERR_OK)
{
while (netconn_recv(newconn, &buf) == ERR_OK)
{
do
{
netbuf_data(buf, &data, &len);
netconn_write(newconn, data, len, NETCONN_COPY);
}
while (netbuf_next(buf) >= 0);
netbuf_delete(buf);
}
/* Close connection and discard connection identifier. */
netconn_close(newconn);
netconn_delete(newconn);
}
}
}
else
{
netconn_delete(newconn);
}
}
}
/****************** SERVER CODE ****************/
/*TCP echo server thread is created in tcpecho_init function*/
void tcpecho_init(void)
{
sys_thread_new('tcpecho_thread', tcpecho_thread, NULL, DEFAULT_THREAD_STACKSIZE, TCPECHO_THREAD_PRIO);
}
#endif /* LWIP_TCP */
#endif /* LWIP_TCP */
I am so blocked. Can anyone help me please ??
