|
|||||||||||||||
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.
Loading
Tick Hook & semaphoresPosted by Jerry Durand on November 15, 2012 I often use Tick Hook to operate some low-jitter simple items and items where it's critical I don't miss a tick. Nothing that really would require its own task and priority level. Anyway, no trouble so far on several projects but I just came up with a need to send a semaphore. I assume I use xSemaphoreGiveFromISR() but do I need to use portEND_SWITCHING_ISR(xHigherPriorityTaskWoken) since I'm already in the FreeRTOS interrupt? Will this even work? RE: Tick Hook & semaphoresPosted by MEdwards on November 15, 2012 Yes you need to use the FromISR() version, and no you don't need to worry about the xHigherPriorityTaskWoken variable because a context switch will happen anyway after the tick hook finishes. In older FreeRTOS versions you would still have to supply the xHigherPriorityTaskWoken parameter, just don't use it afterwards. In newer FreeRTOS versions you can just pass NULL in place of xHigherPriorityTaskWoken. RE: Tick Hook & semaphoresPosted by Jerry Durand on November 15, 2012 Thanks! I'm still running 7.2.0, will update after this project is closed out, but will assume that's good enough to use null.
Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.
|
|||||||||||||||
NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.
Meet Richard Barry and learn about running FreeRTOS on RISC-V at FOSDEM 2019
Version 10.1.1 of the FreeRTOS kernel is available for immediate download. MIT licensed.
View a recording of the "OTA Update Security and Reliability" webinar, presented by TI and AWS.
FreeRTOS and other embedded software careers at AWS.
