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


Software Reset

Posted by Mathias Zenger on May 15, 2009

I am using the ATMEL EVK1100 with AVR ONE!, FreeRTOS and lwIP stack.

I would like to reset my application when certain configuration changes happened (switches which I read in). Therefor I call the routine wdt_reset_mcu() which immediately forces the watchdog timer to bite.

So far so good but unfortunately the program doesn't start again. Only pressing the hardware reset button on the kit helps.

Does anybody know if there are any limitations for shutting down / restarting FreeRTOS which could cause the problem?

Thanks for helping.

RE: Software Reset

Posted by Adam Turowski on May 15, 2009
As far as I know there are no such limitations in FreeRTOS.

I also think that your particular problem is caused by lack of proper initialization in you application. I mean I suspect that your application is based on assumption that some parts of memory/registers/etc. have a specific value after hardware reset. Which can be not the case if you are doing "software" reset. But it is just a guess. Suggest check where exactly program stops working after "software" reset.

RE: Software Reset

Posted by Dave on May 15, 2009
You could also try deinitializing all timers and interrupts before resetting so it doesn't matter if the software reset does not reset peripherals.

The Atmel ARM7 parts have a register you can write to to force all different types of reset. Maybe the AVR32 has the same?

[ 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