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Why does the user need to provide DeviceData in every Processor Expert LDD API call?

Question asked by Stephen Langstaff on Jul 6, 2014
Latest reply on Jul 7, 2014 by Stephen Langstaff

If I create an instance of a driver using Processor Expert, why do I have to pass a DeviceData pointer into the API?

 

For example, if I create a component for the blue LED on my FRDM-KL25Z board named 'LED_BLUE' and of type 'BitIO_LDD', files are created called 'LED_BLUE.c' and 'LED_BLUE.h' and the API functions are prefixed by the name LED_BLUE (e.g. LED_BLUE_Init(), LED_BLUE_PutVal()).

 

I would have thought that this would be enough context for the component to know what object we are talking about without also having to pass LED_BLUE_DeviceData as the first parameter of each function.

 

Couldn't the component store a reference to its own DeviceData? Is there something I am missing?

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