PxDelaySched()

Schedule a delay job (task service).

APPLIES TO

8.2.0

SYNOPSIS
PxError_t PxDelaySched (PxDelay_t delayId, PxTicks_t ticks, void (*handler) (PxArg_t), PxArg_t arg);
ARGUMENTS






delayId




Delay job handle


















ticks




PXROS ticks after which the job is executed


















handler




Handler function to be executed


















arg




Argument for the handler function

















RETURN VALUES






    

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    PXROS error code
    

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ERROR CODES















PXERR_DELAY_ILLDELAY




delayId is not a valid delay handler








PXERR_REQUEST_ILLEGAL




The caller task is not the requester of the delayId object








PXERR_TASK_ILLCALL




Task service called by the handler









DESCRIPTION










PxDelaySched cancels a potential delay job associated with delayId. If ticks is not zero, PXROS schedules activation of the handler call handler(arg) after ticks PXROS ticks and associates this delay job with delayId object. The PxDelaySched can only be called from task level, otherwise PXERR_TASK_ILLCALL error is returned.






















IMPLEMENTATION GUIDELINES
















Before call






    

  • 

    delayId must be a valid PXROS-HR delay object created with a PxDelayRequest call (V). The validity of delayId may also be checked by the PxDelayIsValid macro (F). The delay object must be created on the same core as the caller runs on. The creator core id can be read with the macro PxDelayCoreId and the own core id with PxGetCoreId (C).
    

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  • 

    If ticks is zero, the delay job identified by delayId is stopped. (C)
    

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  • 

    The parameter handler must be a pointer to a valid function (V).
    

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After call






    

  • 

    The function returns PXERR_NOERROR if the delay job could be scheduled. Any other return value describes an error, which has to be interpreted (C).
    

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Best Practice






    

  • 

    This function may be called from tasks only. (V)
    

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SEE ALSO











USAGE








#include "pxdef.h"

#define TICKS 0x500l

PxError_t Err = PxDelaySched(delayId, TICKS, DelHandler, (PxArg_t) 0);

if (Err != PXERR_NOERROR) {
    // Report error
}