simple socket server connection established, but cannot ping/telnet

@Cris72

yes most of the time I am able to ping

but sometimes I can't ping

ping should always succeed.

It seems a problem related to signal integrity on your board or possibly to fpga timing.

@cRIS72

How can I verify Signal Integrity and FPGA timings?

--- Quote Start ---

How can I verify Signal Integrity and FPGA timings?

--- Quote End ---

Time Quest for FPGA timings. If you don't know how to use it, you'll have to learn it.

Signal integrity depends on how well is designed your pcb. Something can be evaluated with a good oscilloscope but first of all you must check if everything complies with component specifications (i.e. capacitive decoupling, ground/supply layers, board traces routing, ...)

In your situation I'll especially focus on PHY signals, both on fpga and wire sides.

@Cris72

Thanks for your support

This is to inform that my design is working now

I didn't modified my hardware or software design.

I used cross cable, link was established of 1000mbps and full duplex

It was working

but earlier link established was 100mbps and half duplex and it was not working

triple_speed_ethernet_design, I used this file. And I was ping for IP address successful.

But at that time, You should note your Ethernet, this mean that in your code you only need to consider some problem including, RX, TX, PHY, MAC address ... you ignore LCD, seg_led...

and you remember to include full file.

and Here you can see:

/* Dinh nghia MicroC/OS-II */

# include "includes.h"

# include <stdio.h>

# include <errno.h>

# include <ctype.h>

# include "system.h"

# include "altera_avalon_pio_regs.h"

# include <unistd.h>

/* Dinh nghia Web Server*/

# include "alt_error_handler.h"

# include "web_server.h"

/* Dinh nghia Nichestack*/

# include "ipport.h"

# include "libport.h"

# include "osport.h"

# include "tcpport.h"

# include "net.h"

# ifndef ALT_INICHE

# error

# endif

# ifndef __ucosii__

# error

# endif

# ifndef RO_ZIPFS

# error

# endif

extern int current_flash_block;

extern void WSTask();

static void WSCreateTasks();

/* NicheStack*/

extern struct net netstatic[STATIC_NETS];

TK_OBJECT(to_wstask);

TK_ENTRY(WSTask);

struct inet_taskinfo wstask = {

&to_wstask,

"web server",

WSTask,

HTTP_PRIO,

APP_STACK_SIZE,

};

/* WSInitialTask se khoi tao NichStack TCP/IP stack va ke do khoi tao

* nhung phan con lai cua web_server

*/

void WSInitialTask(void* pdata)

{

INT8U error_code = OS_NO_ERR;

// Bat dau khoi tao

alt_iniche_init();

//Cho den khi network san sang de thuc hien

netmain();

while (!iniche_net_ready)

TK_SLEEP(1);

TK_NEWTASK(&wstask);

WSCreateTasks();

printf("\nWeb Server Dang duoc bat dau\n");

error_code = OSTaskDel(OS_PRIO_SELF);

alt_uCOSIIErrorHandler(error_code, 0);

while(1); /*dang cho.*/

}

OS_STK WSInitialTaskStk[TASK_STACKSIZE];

OS_STK LEDTaskStk[TASK_STACKSIZE];

OS_STK SSDTaskStk[TASK_STACKSIZE];

OS_STK BCTaskStk[TASK_STACKSIZE];

OS_EVENT *board_control_mbox;

int main (int argc, char* argv[], char* envp[])

{

/* Khoi tao khoi Flash dang hien hanh*/

current_flash_block = -1;

INT8U error_code;

/* Xoa RTOS timer */

OSTimeSet(0);

error_code = OSTaskCreateExt(WSInitialTask,

NULL,

(void *)&WSInitialTaskStk[TASK_STACKSIZE-1],

WS_INITIAL_TASK_PRIO,

WS_INITIAL_TASK_PRIO,

WSInitialTaskStk,

TASK_STACKSIZE,

NULL,

0);

alt_uCOSIIErrorHandler(error_code, 0);

OSStart();

while(1); /* Cong lap cho. */

return -1;

}

static void WSCreateTasks()

{

INT8U error_code = OS_NO_ERR;

/* Start LED Task. */

error_code = OSTaskCreateExt(LED_task,

NULL,

(void *)&LEDTaskStk[TASK_STACKSIZE-1],

LED_PRIO,

LED_PRIO,

LEDTaskStk,

TASK_STACKSIZE,

NULL,

0);

alt_uCOSIIErrorHandler(error_code, 0);

/* Bat dau SSD Task. */

# ifdef SEVEN_SEG_PIO_NAME

error_code = OSTaskCreateExt(SSD_task,

NULL,

(void *)&SSDTaskStk[TASK_STACKSIZE-1],

SSD_PRIO,

SSD_PRIO,

SSDTaskStk,

TASK_STACKSIZE,

NULL,

0);

alt_uCOSIIErrorHandler(error_code, 0);

# endif

error_code = OSTaskCreateExt(board_control_task,

NULL,

(void *)&BCTaskStk[TASK_STACKSIZE-1],

BOARD_PRIO,

BOARD_PRIO,

BCTaskStk,

TASK_STACKSIZE,

NULL,

0);

alt_uCOSIIErrorHandler(error_code, 0);

OSTaskSuspend(LED_PRIO);

OSTaskSuspend(SSD_PRIO);

}

void board_control_task(void *pdata)

{

INT8U error_code = OS_NO_ERR;

board_control_mbox = OSMboxCreate((void *)NULL);

struct http_form_data* board_control_mbox_contents;

while(1)

{

board_control_mbox_contents = (void*)OSMboxPend(board_control_mbox, 0, &error_code);

if (board_control_mbox_contents->LED_ON)

{

OSTaskResume(LED_PRIO);

}

else

{

OSTaskSuspend(LED_PRIO);

IOWR_ALTERA_AVALON_PIO_DATA( LED_PIO_BASE, 0 );

}

if (board_control_mbox_contents->SSD_ON)

{

OSTaskResume(SSD_PRIO);

}

else

{

OSTaskSuspend(SSD_PRIO);

# ifdef SEVEN_SEG_PIO_NAME

sevenseg_set_hex(0);

# endif

}

}

}

void LED_task(void* pdata)

{

alt_u8 led = 0x2;

alt_u8 dir = 0;

while (1)

{

if (led & 0x81)

{

dir = (dir ^ 0x1);

}

if (dir)

{

led = led >> 1;

}

else

{

led = led << 1;

}

IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE, led);

OSTimeDlyHMSM(0,0,0,50);

}

}

Hi everyone,

In TCP client programming, we use connect() to establish a new TCP connection.

connect() returns zero on success or -1 on error.

If server is up , connect() returns zero and client connects to server.

what if server is down?

I placed connect() in while loop with a condition to exit from while loop when it returns ZERO(connects successfully).

It doesn't work.........

suggest me a solution in client program to connect a server which can come UP and go DOWN at any time.

--- Quote Start ---

If you can ping the board, there's definitely no problem at the mac/phy levels, so I don't think you need to include that.

Probably you have a wrong SSS code or made a mistake in tcp configuration: infact ping relies on UDP, while the server-client connection requires TCP which is a bit more complex.

Using a network analyzer like Wireshark can easily help you to find out if connection initiates and where it fails before being established.

--- Quote End ---

Hi,Cris72

The output of NIOS II is:

************************************************** *************

InterNiche Portable TCP/IP, v3.1

Copyright 1996-2008 by InterNiche Technologies. All rights reserved.

prep_tse_mac 0

Your Ethernet MAC address is 00:07:ed:ff:61:06

Static IP Address is 192.168.10.234

prepped 1 interface, initializing...

[tse_mac_init]

INFO : TSE MAC 0 found at address 0x0b442000

INFO : PHY Marvell 88E1111 found at PHY address 0x10 of MAC Group[0]

INFO : PHY[0.0] - Automatically mapped to tse_mac_device[0]

INFO : PHY[0.0] - Restart Auto-Negotiation, checking PHY link...

INFO : PHY[0.0] - Auto-Negotiation PASSED

MARVELL : Mode changed to RGMII/Modified MII to Copper mode

MARVELL : Enable RGMII Timing Control

MARVELL : PHY reset

INFO : PHY[0.0] - Checking link...

INFO : PHY[0.0] - Link not yet established, restart auto-negotiation...

INFO : PHY[0.0] - Restart Auto-Negotiation, checking PHY link...

INFO : PHY[0.0] - Auto-Negotiation PASSED

INFO : PHY[0.0] - Link established

INFO : PHY[0.0] - Speed = 1000, Duplex = Full

OK, x=0, CMD_CONFIG=0x00000000

MAC post-initialization: CMD_CONFIG=0x0400020b

[tse_sgdma_read_init] RX descriptor chain desc (1 depth) created

mctest init called

IP address of et1 : 192.168.10.234

Created "Inet main" task (Prio: 2)

Created "clock tick" task (Prio: 3)

Simple Socket Server starting up

[sss_task] Simple Socket Server listening on port 30

Created "simple socket server" task (Prio: 4)

************************************************** ******

I can send words or command via Telnet or Ping, when I use a router. However, I always failed when I directly connect the board and PC with a cross-over cable. I am really confused, I hope that you could help me.

Have a good day!

--- Quote Start ---

Hi everyone,

In TCP client programming, we use connect() to establish a new TCP connection.

connect() returns zero on success or -1 on error.

If server is up , connect() returns zero and client connects to server.

what if server is down?

I placed connect() in while loop with a condition to exit from while loop when it returns ZERO(connects successfully).

It doesn't work.........

suggest me a solution in client program to connect a server which can come UP and go DOWN at any time.

--- Quote End ---

Hi,rahul

Can you still remember how to solve the problem, which is metioned previously.I can send words or command via Telnet or Ping, when I use a router(100M). But, when I I directly connect the board and PC with a cross-over cable or a router(1000M), I failed. I hope you could give me some advice.