Quality RTOS & Embedded Software

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



Posted by phani0913 on December 15, 2013


I will be grateful, can anyone let me know the dependencies or definitions missing, inorder to proceed compiling my creating semaphore prog., Tried to followp with earlier threads, but didn't serve the need.

Error: L6218E: Undefined symbol xSemaphoreCreateBinary (referred from main.o).

Thank you


Posted by rtel on December 15, 2013

Which version of FreeRTOS are you using? xSemaphoreCreateBinary() was only introduced in V7.6.0, prior to that the vSemaphoreCreateBinary() macro was used (note the 'v' prefix). xSemaphoreCreateBinary() was introduced to ensure the calling semantics were the same for all semaphore functions.



Posted by phani0913 on December 15, 2013

Thanks for the quick reply.

My FreeRTOS version is 7.1.1, I'm able to compile now with vSemaphoreCreateBinary()


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

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

Latest News

Meet us at Embedded World. Hall 3A-525.

Hear from Richard Barry at Embedded World. Feb 28, 16:00, Hall 4-428.

Video: Watch James Gosling & Richard Barry at re:Invent, Las Vegas 2017.

FreeRTOS kernel V10.0.1 is available for immediate download. Now MIT licensed.

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

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