Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Real time embedded FreeRTOS mailing list 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem TCP & FAT Training


lwIP_Demo_Rowley_ARM7 crash with a ping

Posted by pdesii on March 14, 2008
lwIP_Demo_Rowley_ARM7 seems to crash if I make a ping with big packet.

The ping used is:
ping -l 4096

I compiled the project with gcc.

Someone can confirm me the problem?
Someone can help me?

Thanks a lot for your time.


RE: lwIP_Demo_Rowley_ARM7 crash with a ping

Posted by Richard on March 14, 2008
I imagine this is something to do with the buffer sizes. Am I right in assuming that pings of size less than 1500 work ok?


RE: lwIP_Demo_Rowley_ARM7 crash with a ping

Posted by pdesii on March 17, 2008
Yes, you are right. It works well with ping until 2000 byte. Then, with bigger ping, application crashes; if some packet was discarded, it have been not a big problem, but crashing, all application is unusable.
I tried to change al lot of lwip options, but the result was always the same.
I am very sorry, ... but I have no more ideas!! (:<)


RE: lwIP_Demo_Rowley_ARM7 crash with a ping

Posted by danilo vendruscolo on March 18, 2008
i have run into the same problem and I had it fixed when I disabled ip frag and ip reassembly
at lwiopt.h

You could try the lwip forum too, there are some bugs in pbuf.c that they say it would cause this problem, but when I download a newer pbuf.c, version 1.86, the bug persisted.

So the solution was to add these two lines to lwiopts.h

#define IP_FRAG 0

hope it helps.


[ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ]

Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2016 Real Time Engineers Ltd.
Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.

Latest News:

FreeRTOS V9.0.0 is now available for download.

Free TCP/IP and file system demos for the RTOS

Sponsored Links

⇓ Now With No Code Size Limit! ⇓
⇑ Free Download Without Registering ⇑

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Renesas Electronics Gold Alliance RTOS Partner.jpg

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

Atmel RTOS partner supporting ARM Cortex-M3 and AVR32 microcontrollers

STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Xilinx Microblaze and Zynq partner

Silicon Labs low power RTOS partner

Altera RTOS partner for Nios II and Cortex-A9 SoC

Freescale Alliance RTOS Member supporting ARM and ColdFire microcontrollers

Infineon ARM Cortex-M microcontrollers

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

Cypress RTOS partner supporting ARM Cortex-M3

Fujitsu RTOS partner supporting ARM Cortex-M3 and FM3

Microsemi (previously Actel) RTOS partner supporting ARM Cortex-M3

Atollic Partner

IAR Partner

Keil ARM Partner

Embedded Artists