MicroBlaze lwIP Echo Server Application on Spartan 3E (Rel. 11.4)

[kp9mueller]

In EDK the managed C application project "lwIP Echo Server" did not work. After some experiments it turns out that the following change in "platform.c" was required to successfully ran the application:

void platform_setup_interrupts()
{
	XIntc *intcp;
	intcp = &intc;

    	XIntc_Initialize(intcp, XPAR_XPS_INTC_0_DEVICE_ID);
	XIntc_Start(intcp, XIN_REAL_MODE);

	/* Start the interrupt controller */
	XIntc_mMasterEnable(XPAR_XPS_INTC_0_BASEADDR);

	/*
	** ### proper location is here...
	*/
	platform_setup_timer();

#ifdef __PPC__
   	XExc_Init();
    	XExc_RegisterHandler(XEXC_ID_NON_CRITICAL_INT,
                         (XExceptionHandler)XIntc_DeviceInterruptHandler,
                         (void*) XPAR_XPS_INTC_0_DEVICE_ID);
#elif __MICROBLAZE__
	microblaze_register_handler((XInterruptHandler)XIntc_InterruptHandler, intcp);
#endif

#ifdef XPAR_ETHERNET_MAC_IP2INTC_IRPT_MASK
	/* Enable timer and EMAC interrupts in the interrupt controller */
	XIntc_mEnableIntr(XPAR_XPS_INTC_0_BASEADDR, 
#ifdef __MICROBLAZE__
			PLATFORM_TIMER_INTERRUPT_MASK | 
#endif
		        XPAR_ETHERNET_MAC_IP2INTC_IRPT_MASK);
#endif

	/*
	** ### DO NOT PLACE
	**   ==>>  platform_setup_timer();
	** after "XIntc_mEnableIntr" since this disables Ethernet MAC interrupts!?!
	*/
}

 Note that platform_setup_timer() was moved to the top.

If platform_setup_timer() is called at the end of platform_setup_interrupts() it will probably disable the Ethernet MAC interrupt since platform_setup_timer() contains

	XIntc_mEnableIntr(XPAR_XPS_INTC_0_BASEADDR, PLATFORM_TIMER_INTERRUPT_MASK);

(and thus no data from the MAC will be received). I don't think that PPC is affected since it works different.

Hopefully it helps people running into the same problem using MicroBlaze and Release 11.4 of EDK/SDK.

After the modification everything works fine with different telnet clients.

[speccy]

Thanks!!! This works.

My setup was the ML402 board, with emaclite and microblaze.

[billblade]

I was having the same problem with my Spartan SP601 board, and this fix solved the problem - thanks.

[miracle]

Many thanks! Now my echo server works fine.

[aarunach]

Hello Mr. kp9mueller,

Thanks a ton. I was stuck with this issue for more than 3 days with very little success.

Just got hold off this page and your solution worked.

Really appreciate your effort/initiate to document this.

[aarunach]

Hi,

I am now trying to add my software program to process the data received from the PC. 

I am currently adding it to the transfer_data() function in echo.c. I am using the XEmacLite_RecvFrame API defined for emaclite. Somehow, when I add these additional piece of code, it fails to respond. 

Is this the right place to do? Do I need to call any timer functions before doing this?

Could you send me some sample working user code where XEmacLite_RecvFrame is used?

BTW, I would appreciate if someone could educate me what the *FramePtr argument should be for XEmacLite_RecvFrame.

Thanks!

[aarunach]

Could anyone who have used the XEmacLite_RecvFrame or XEmacLite_SendFrame kindly reply to my above query.

Do timers or interrupts need to be called explicitly? 

I am stuck and am looking for a way out.

Thanks!

[aarunach]

Hi,

Could someone reply to my previous query?

Thanks!

[gentlebreeze5]

Hi,  I'm using EDK 13.2, where the postion of platform_setup_timer() is originally right. But still I cannot even ping my board (virtex 605) which is connnected directly with cat5 cable, not to mention the telnet trial.

Can you please help me?  Thanks!

[kp9mueller]

Hi gentlebreeze5,

I cannot verify the problem you have with "lwip_echo_server". Currently I am using EDK/SDK 13.1 and indeed the position of

platform_setup_timer(); in platform.c is correct. The program should give the following output:

-----lwIP TCP echo server ------

TCP packets sent to port 6001 will be echoed back
Board IP: 192.168.220.155
Netmask : 255.255.255.0
Gateway : 192.168.220.1
TCP echo server started @ port 7

 (according to your IP settings).

Ping results in (sorry it's german):

C:\dobudish-1.1.4>ping 192.168.220.155

Ping wird ausgeführt für 192.168.220.155 mit 32 Bytes Daten:
Antwort von 192.168.220.155: Bytes=32 Zeit=1ms TTL=255
Antwort von 192.168.220.155: Bytes=32 Zeit=1ms TTL=255
Antwort von 192.168.220.155: Bytes=32 Zeit=1ms TTL=255
Antwort von 192.168.220.155: Bytes=32 Zeit=1ms TTL=255

Ping-Statistik für 192.168.220.155:
    Pakete: Gesendet = 4, Empfangen = 4, Verloren = 0
    (0% Verlust),
Ca. Zeitangaben in Millisek.:
    Minimum = 1ms, Maximum = 1ms, Mittelwert = 1ms

 I used telnet on port 7 and if I enter "12345" I get this result (local echo forced on):

112233445566

 Please check if the following conditions are met:

• xps_timer is present in design and interrupt is connected to interrupt controller (xps_intc)
• Ethernet_MAC (xps_ethernetlite) has interrupt output connection to xps_intc
• Connect your board to the same ethernet cable as an ordinary PC (direct connection PC <-> board with a normal cable does not work!)
• watch LEDs on ethernet connector - every character you send should flash an LED (usually two times R/T)
• the same thing happens with PING, which should/must work
• take care of the correct network mask

I am confident it will work for you also - good luck! :smileyhappy:

[sxl630828191]

Hello,

         I'm reading your last reply, and I have checked all the details you mentioned in my porject.

         But I cannot get connected to the board.

         The terminal prints what may print. And i used the ethernet cross wire.

         Hoping you can read this post.

         Best regards!

[sachinteotia]

Hi sir, I am very new in EDK projects and I need an example code for the lwIP Echo- server program on xilinx EDK virtex 2 pro kit.........

Thanx in advance.....