Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem


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 ]    [ Privacy ]    [ Sitemap ]    [ ]

Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.

Meet Richard Barry and learn about running FreeRTOS on RISC-V at FOSDEM 2019

Version 10.1.1 of the FreeRTOS kernel is available for immediate download. MIT licensed.

View a recording of the "OTA Update Security and Reliability" webinar, presented by TI and AWS.


FreeRTOS and other embedded software careers at AWS.

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Espressif ESP32

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers


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

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

OpenRTOS and SafeRTOS

Xilinx Microblaze and Zynq partner