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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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xQueuePeekPosted by Dennis Tan on September 3, 2009 Hi: Is it safe to call xQueuePeek inside an ISR function? Dennis RE: xQueuePeekPosted by MEdwards on September 3, 2009 that is an easy question, the answer is no. Only functions with FromISR in their name can be called from an interrupt. RE: xQueuePeekPosted by Dennis Tan on September 3, 2009 If I want to peek an item from an ISR function, how could I do it? RE: xQueuePeekPosted by dave m on September 4, 2009 You might have good luck by starting with the xQueueReceiveFromISR code and modifying it appropriately. I just looked at that code for the first time, so this suggestion may miss a subtle and important point, but if you leave out "--( pxQueue->uxMessagesWaiting )" and the subsequent "if(){}else{}" block, you should be pretty close.
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NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.
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