Quality RTOS & Embedded Software

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


kernell feezes

Posted by Nobody/Anonymous on October 31, 2006

I am having strange problem (at least in my point of view).
When I do this:
__arm void vRPM_ISR ( void )
xNewRPM = xTaskGetTickCount();

whole freertos kernell freezes.
When I chanege it to this:
__arm void vRPM_ISR ( void )

xNewRPM = xTickCount;

everything runs well. So the problem must be in xTaskGetTickCount function in here:

any explanation appreciated

RE: kernell feezes

Posted by Nobody/Anonymous on October 31, 2006
You point out the answer yourself - do not call API functions from ISR's unless they have FromISR at the end of the function name. Critical sections inside an ISR is not good.

RE: kernell feezes

Posted by Nobody/Anonymous on November 1, 2006

Thank you for your reply. I thought that I have missed something.

thank you very much

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

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

Latest News

Version 10.1.0 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