[RTOS Support] no definition for "xQueueCreateCountingSemaph

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no definition for "xQueueCreateCountingSemaph

Posted by Beja Nissim on April 20, 2009

Dear all,

I using the STM3210E-EVAL board which is based on the ST microelectronics STM32f103 uController.
I'm trying to use FreeRTOSV5.1.1 with IAR embedded workbench 5.20.

Based on the Demo project, i tried to use xSemaphoreCreateCounting() function but got the following
Linking Error:
Error[Li005]: no definition for "xQueueCreateCountingSemaphore" [referenced from F:\OS_Projects
\_FreeRTOS\FreeRTOSV5.1.1\FreeRTOS\Demo\

After digging a bit i found the following:
1. Inside semphr.h - there is this line

#define xSemaphoreCreateCounting( uxMaxCount, uxInitialCount )
xQueueCreateCountingSemaphore( uxMaxCount, uxInitialCount )

it seems that xSemaphoreCreateCounting( uxMaxCount, uxInitialCount ) does not have any
implementation at all.

Is this the reason i got the linking error which i mentioned above?
If not, can some let me know what would be the problem?

2. Does anyone know used xSemaphoreCreateCounting() function? if so, i would be happy to know
how?

Thanks in advanced
Beja.

RE: no definition for "xQueueCreateCountingSe

Posted by MEdwards on April 20, 2009

xQueueCreateCountingSemaphore() is defined in queue.c line 419 (version 5.2.0). configUSE_COUNTING_SEMAPHORES must be defined.

It is used by some of the demo app tasks.