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 BasicWeb block at sys_mbox_fetch(conn->m

Posted by Nobody/Anonymous on February 15, 2006

Inside vBasicWebServer(), when it tries to open up a new connection, "pxHTTPListener = netconn_new( NETCONN_TCP );", it tries to call "sys_arch_mbox_fetch(mbox, msg, 0);". Since there is no message in the mbox, it blocks and will not continue to do "netconn_bind()....".

The reason it uses "block" mode to do mbox fetch is because when vBasicWebServer task is created, the timeout structure has a "next" field with value 0.

Is this normal behavior?


RE: lwIP BasicWeb block at sys_mbox_fetch(conn->m

Posted by Nobody/Anonymous on February 16, 2006
Most likely, nobody will help me out on this one. However, I'll still give it a try.

It seems that I'm not alone on this issue also. I found some one on the internet had the same issue when he tried to use lwIP's netconn_new(). It blocks on the call.

FreeRTOS used lwIP in one of the samples, i.e., lwIP_demo_Rowley_ARM7 . I'm just wondering did this issue come up when netconn_new() was called? How was it handled? I'm thinking send a fake message to itself before calling netconn_new() so that it will not block.

Thanks for any input.


[ 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