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


SPRINTF is causing an FIQ exception

Posted by Nobody/Anonymous on March 16, 2006
Im using the STR711 with FreeRtos and the Idealist IDE ( GCC compiler ).
Using the sprintf function causes an FIQ exception. The sprintf is performed properly, but the next instruction after the exception. I have core and user level Fiq interrupts disabled. Also have increased my stack and heap sizes.
_STACKSIZE = 2048;
_HEAPSIZE = 2048;

#define configTOTAL_HEAP_SIZE((size_t)(20480))

has anyone come across something like this ?


RE: SPRINTF is causing an FIQ exception

Posted by Nobody/Anonymous on March 17, 2006
You have an STR711 with 20.5K of RAM?

I think you are probably right in thinking it could be a stack problem as the GCC string handling functions are very stack hungry. One of the few problems with using GCC on ARM.

The _STACKSIE=2048 I am guessing is setting up the user/system mode stack? If so then increasing this setting will have no effect once the scheduler has been started as the stack actually allocated to each task is given by the parameter passed to the xTaskCreate() function. Have you tried increasing the stack allocated to the function that calls sprintf()? You may be surprised as to how much it needs.

[ 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