The FreeRTOS kernel is an MIT licensed AWS open source project.

Quality RTOS & Embedded Software About   Contact   Support   FAQ   Download Menu      Quick Start Supported MCUs PDF Books Trace Tools Ecosystem Quick Start Guide Support Forum ⇓ 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  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+POSIX:  POSIX threading API  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 ]    [ Privacy ]    [ Sitemap ]    [ ] Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News Meet Richard Barry and learn what's new in the FreeRTOS project at Embedded World 2019 NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS. 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. Careers FreeRTOS and other embedded software careers at AWS. FreeRTOS Partners