Difference: CmsisRtos (5 vs. 6)

Revision 62020-04-20 - PeterSchmid

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title="CMSIS-RTOS for Mecrisp-Cube" titlestyle="color:#F00000;" }%

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Intro

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Intro

Why a Preemptive Real Time Operating System?

Forth systems traditionally make use of cooperative multitasking. It is very simple and clever. But it has its limits. If you write all your software by yourself, each software part can be cooperative. But if you want to benefit from middleware written by somebody else (and most probably not written in Forth), you can be sure that software is not cooperative (in the context of multitasking). Forth wants to rule your system. I would like to have a Forth system that is cooperative. It should extend the system, to make it interactive and easy to use. The Forth itself is only a thread and can be used as some sort of CLI for testing purposes or could be the main part of the application.

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Contents

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Contents

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movs tos, 42 pop {r0-r3, pc}

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CMSIS-RTOS API

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The C function prototype for osThreadNew looks like this:

osThreadId_t osThreadNew (osThreadFunc_t func, void *argument, const osThreadAttr_t *attr);

param[in]     func          thread function.
param[in]     argument      pointer that is passed to the thread function as start argument.
param[in]     attr          thread attributes; NULL: default values.

return        thread ID for reference by other functions or NULL in case of error.

The parameter order for the Forth Word is the same: a1 is func, a2 is argument, and a3 is attr.

osThreadNew  ( a1 a2 a3 -- u )   Create a thread and add it to Active Threads.

RTOS Support Functions

osNewDataStack
xPortGetFreeHeapSize

Kernel Management Functions

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> Kernel Information and Control

osKernelGetTickCount
osKernelGetTickFreq
osKernelGetSysTimerCount
osKernelGetSysTimerFreq

Generic Wait Functions

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> Generic Wait Functions

osDelay
osDelayUntil

Thread Management

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> Thread Management

osThreadNew
osThreadGetId
osThreadGetState

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osThreadEnumerate

Timer Management Functions

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> Timer Management

osTimerNew
osTimerGetName
osTimerStart

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osTimerDelete

Event Flags Management Functions

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> Event Flags

osEventFlagsNew
osEventFlagsSet
osEventFlagsClear

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osEventFlagsDelete

Mutex Management Functions

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> Mutex Management

osMutexNew
osMutexAcquire
osMutexRelease

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osMutexDelete

Semaphore Management Functions

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> Semaphores

osSemaphoreNew
osSemaphoreAcquire
osSemaphoreRelease

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osSemaphoreDelete

Message Queue Management Functions

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> Message Queue

osMessageQueueNew
osMessageQueuePut
osMessageQueueGet

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