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FreeRTOS Support ArchiveThe FreeRTOS support forum is used to obtain active support directly from Real Time Engineers Ltd. In return for using our top quality software and services for free, we request you play fair and do your bit to help others too! Sign up to receive notifications of new support topics then help where you can.
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How to 'reset' counting semaphore?Posted by npkz on March 7, 2017 Hello people, is there any way to set inital count of counting semaphore after the semaphore is created? If I create semaphore like this xSemaphore = xSemaphoreCreateCounting( 10, 0 ), after some time I would like to put semaphore current value to 0 again. I was thinking to go with for loop uxSemaphoreGetCount times, and do xSemaphoreTake in each iteration, but this function (...GetCount) is not present in v8.2.3 that I am using right now. Regards How to 'reset' counting semaphore?Posted by richarddamon on March 7, 2017 You could do xSemaphoreTake() with a timeout of 0 until it fails. How to 'reset' counting semaphore?Posted by npkz on March 7, 2017 That's nice idea. Thanks! How to 'reset' counting semaphore?Posted by rtel on March 7, 2017 You can probably use xQueueReset() too - you might have to cast the semaphore handle to a queue handle when passing in the parameter to avoid compiler warnings. How to 'reset' counting semaphore?Posted by npkz on March 8, 2017 Yes, xQueueReset() works as well. Cast doesn't seem to be needed.
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NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.
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