The FreeRTOS kernel is now an MIT licensed AWS open source project, and these pages are being updated accordingly.

Quality RTOS & Embedded Software About   Contact   Support   FAQ   Download Menu      Quick Start Supported MCUs PDF Books Trace Tools Ecosystem Quick Start Guide ⇓ Download Source ⇓ FreeRTOS+ Ecosystem  FreeRTOS+TCP:  Thread safe TCP/IP stack  SafeRTOS:  TUV certified RTOS  OpenRTOS:  Commercial Licensed RTOS  Fail Safe File System:  Ensures data integrity  FreeRTOS BSPs:  3rd party driver packages  UDP/IP:  Thread aware UDP stack  Trace & Visualisation:  Tracealyzer for FreeRTOS  CLI:  Command line interface  WolfSSL SSL / TLS:  Networking security protocols  RTOS Training:  Delivered online or on-site  IO:  read(), write(), ioctl() interface FreeRTOS+ Lab Projects  FreeRTOS+FAT:  Thread aware file system Hint: Use the tree menu to navigate groups of related pages   Semaphores [API]  TIP: 'Task Notifications' can provide a light weight alternative to semaphores in many situations  Modules xSemaphoreCreateBinary xSemaphoreCreateBinaryStatic vSemaphoreCreateBinary [use xSemaphoreCreateBinary() for new designs] xSemaphoreCreateCounting xSemaphoreCreateCountingStatic xSemaphoreCreateMutex xSemaphoreCreateMutexStatic xSemaphoreCreateRecursiveMutex xSemaphoreCreateRecursiveMutexStatic vSemaphoreDelete xSemaphoreGetMutexHolder xSemaphoreTake xSemaphoreTakeFromISR xSemaphoreTakeRecursive xSemaphoreGive xSemaphoreGiveRecursive xSemaphoreGiveFromISR uxSemaphoreGetCount vSemaphoreDelete semphr.h void vSemaphoreDelete( SemaphoreHandle_t xSemaphore ); Deletes a semaphore, including mutex type semaphores and recursive semaphores. Do not delete a semaphore that has tasks blocked on it (tasks that are in the Blocked state waiting for the semaphore to become available). Parameters: xSemaphore  The handle of the semaphore being deleted. [ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ] Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News FreeRTOS kernel V10.0.1 is available for immediate download. Now MIT licensed. Video: Watch James Gosling & Richard Barry at re:Invent, Las Vegas 2017. New FAQ page about the FreeRTOS kernel and Amazon FreeRTOS. FreeRTOS Partners