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


Resume task from interrupt and end vTaskDelay

Posted by mayank15 on September 8, 2014

I am running FreeRTOS on STM32-Eval board. I create a task and call vTaskDelay(x) at the end to have the task block for x number of ticks and have the board enter sleep state.

Is there a way to resume the task when an interrupt triggers or it just has to wait until the block time has expired?

I cannot call vTaskSuspend because i do want the task to run on its own after x number of ticks as well. I want the interrupt as a way to wake the device earlier and resume normal operation.


Resume task from interrupt and end vTaskDelay

Posted by davedoors on September 8, 2014

Create a semaphore then replace the call to vTaskDelay() with a call to xSemaphoreTake() with the same block time. The interrupt can unblock the task by giving the semaphore, and the task will know if it was unblocked by an interrupt or by the delay expiring by testing the return value of xSemaphoreTake(). Here is an example (at the bottom) http://www.freertos.org/a00124.html

Resume task from interrupt and end vTaskDelay

Posted by mayank15 on September 8, 2014

Great i will take a look Thanks

[ 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