| CMSIS-RTOS RTX Version 4.75 CMSIS-RTOS RTX: Real-Time Operating System for Cortex-M processor-based devices

- RTX

- Main Page
- Usage and Description
- Reference

Function Overview

The following list provides a brief overview of all CMSIS-RTOS functions. Functions marked with $ are optional. A CMSIS RTOS implementation may not provided functions, but this is clearly indicated with osFeatureXXXX defines.

- Kernel Information and Control
  - osKernelInitialize : Initialize the RTOS kernel.
  - osKernelStart : Start the RTOS kernel.
  - osKernelRunning : Query if the RTOS kernel is running.
  - osKernelSysTick $ : Get RTOS kernel system timer counter.
  - osKernelSysTickFrequency $ : RTOS kernel system timer frequency in Hz.
  - osKernelSysTickMicroSec $ : Convert microseconds value to RTOS kernel system timer value.

- Thread Management
  - osThreadCreate : Start execution of a thread function.
  - osThreadTerminate : Stop execution of a thread function.
  - osThreadYield : Pass execution to next ready thread function.
  - osThreadGetId : Get the thread identifier to reference this thread.
  - osThreadSetPriority : Change the execution priority of a thread function.
  - osThreadGetPriority : Obtain the current execution priority of a thread function.

- Generic Wait Functions
  - osDelay : Wait for a specified time.
  - osWait $ : Wait for any event of the type Signal, Message, or Mail.

- Timer Management $
  - osTimerCreate : Define attributes of the timer callback function.
  - osTimerStart : Start or restart the timer with a time value.
  - osTimerStop : Stop the timer.
  - osTimerDelete : Delete a timer.

- Signal Management
  - osSignalSet : Set signal flags of a thread.
  - osSignalClear : Reset signal flags of a thread.
  - osSignalWait : Suspend execution until specific signal flags are set.

- Mutex Management $
  - osMutexCreate : Define and initialize a mutex.
  - osMutexWait : Obtain a mutex or Wait until it becomes available.
  - osMutexRelease : Release a mutex.
  - osMutexDelete : Delete a mutex.

- Semaphore Management $
  - osSemaphoreCreate : Define and initialize a semaphore.
  - osSemaphoreWait : Obtain a semaphore token or Wait until it becomes available.
  - osSemaphoreRelease : Release a semaphore token.
  - osSemaphoreDelete : Delete a semaphore.

- Memory Pool Management $
  - osPoolCreate : Define and initialize a fix-size memory pool.
  - osPoolAlloc : Allocate a memory block.
  - osPoolCAlloc : Allocate a memory block and zero-set this block.
  - osPoolFree : Return a memory block to the memory pool.

- Message Queue Management $
  - osMessageCreate : Define and initialize a message queue.
  - osMessagePut : Put a message into a message queue.
  - osMessageGet : Get a message or suspend thread execution until message arrives.

- Mail Queue Management $
  - osMailCreate : Define and initialize a mail queue with fix-size memory blocks.
  - osMailAlloc : Allocate a memory block.
  - osMailCAlloc : Allocate a memory block and zero-set this block.
  - osMailPut : Put a memory block into a mail queue.
  - osMailGet : Get a mail or suspend thread execution until mail arrives.
  - osMailFree : Return a memory block to the mail queue.