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# 1.1.4.9 DRV_METROLOGY_CalibrationCallbackRegister Function

## C

    DRV_METROLOGY_RESULT DRV_METROLOGY_CalibrationCallbackRegister (
        DRV_METROLOGY_CALIBRATION_CALLBACK callback
    );

## Summary

Registers a function with the metrology driver to be called back when the calibration process has completed.

## Description

This function allows a client to register a handling function with the driver to call back when a calibration process has completed. This function must be always called after DRV_METROLOGY_Initialize routine is called, since the initialization routine sets a NULL pointer to indicate no callback.

## Precondition

DRV_METROLOGY_Initialize must have been called before.

## Parameters

Parameters | Description
--- | ---
callback | Pointer to the function to be called

## Returns

If successful, returns DRV_METROLOGY_SUCCESS. Otherwise, it returns DRV_METROLOGY_ERROR.

## Example

        staticvoid_APP_METROLOGY_CalibrationCallback(bool result)
        {
            if (app_metrologyData.pCalibrationCallback)
            {
                app_metrologyData.pCalibrationCallback(result);
            }

            /* Signal Metrology to exit calibration status */
            OSAL_SEM_Post(&appMetrologyCalibrationSemID);
        }

        (...)

        /* Set Callback for calibration process */
        DRV_METROLOGY_CalibrationCallbackRegister(_APP_METROLOGY_CalibrationCallback);

## Remarks

None.

Rev: E