Quality RTOS & Embedded Software

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


Number of threads Created

Posted by pradnya123 on August 21, 2017

how many Number of threads can be Created in STM32F207. I have created 6 threads successfully but when i am trying to created 7th thread its not working. On which factor thread number is defined how to increase it?

Number of threads Created

Posted by rtel on August 21, 2017

From the API documentation for the xTaskCreate() return value:

"If the task was created successfully then pdPASS is returned. Otherwise errCOULDNOTALLOCATEREQUIREDMEMORY is returned."

So the task was not created because you ran out of heap memory?

Then read http://www.freertos.org/a00111.html which says how to allocate more memory to FreeRTOS - see the configTOTALHEAPSIZE parameter.

Googling configTOTALHEAPSIZE then also provides a little more information and links: http://www.freertos.org/a00110.html#configTOTALHEAPSIZE

Hope that helps!

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

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

Latest News

FreeRTOS v10.2.1 is available for immediate download. MIT licensed, includes 64-bit RISC-V, NXP Cortex-M33 demo & Nuvoton Cortex-M23 demo.

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

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

Cadence Tensilica Cortes

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