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Discussion Groups | BasicX | GetADC() overhead

Discussion forum for the BasicX family of microcontroller chips.

GetADC() overhead - Author Unknown - Apr 19 5:22:00 2001

Does anyone know if the GetADC() functions always run code to
re-configure the input pins to A/D type, regardless of whether they
were already set that way? I would have thought that there was a
processor overhead associated with that method and that a coding
scheme such as:

Call ConfigADC(pinnumber) 'configure the pin as A/D
Do
iV = GetADC(pinnumber) 'faster as pin is already configured
Loop

would be better.

I doubt many applications switch pins from one mode to another as the
input circuitry would not support this very easily.

Ian




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