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


Multi-Task to Multi-Task event ...

Posted by debugasm on May 1, 2014


I need a little input on how to accomplish this. My project is structured as follows :

Input A - Thread Input A -----+ Input B - Thread Input B -----+ Input C - Thread Input C -----+----- Thread Output A - Output A Input D - Thread Input D -----+----- Thread Output B - Output B Input E - Thread Input E -----+----- Thread Output C - Output C Input F - Thread Input F -----+----- Thread Output D - Output D Input G - Thread Input G -----+ Input H - Thread Input H -----+

Thread Input X running the same code on different input. Thread Output X running the same code on different output.

I have to be able to send from one Thread Input X an event / message or another to all Thread Output X (also not in the same instant).

In my first approach I used a message queue. In Thread Output X I have create 4 message queue on which the Thread Input X write (Thread Output X only read).

On event in Thread Input X I write the same message on all 4 message queue, but it does not seem like the ideal solution.

What technique can I use ? Event Group ?

Thanks for any suggestions.


Multi-Task to Multi-Task event ...

Posted by davedoors on May 1, 2014

How detailed is the event? If it can be conveyed as a single bit then an event group would let all the tasks block on the same bits in the same event group with each bit having a different meaning.

Multi-Task to Multi-Task event ...

Posted by debugasm on May 1, 2014

How detailed is the event?

Yes, a single bit is sufficient.

Then with an EventGroup of 4-bit size I should be able to simplify things.

I create one EventGroup with 4-bit size, each Thread Input X writes the corresponding bit to wake up Thread Output X. On Thread Output X waiting an EventGroup on single bit.

It should go, I try.

Thanks very much.


[ 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