using internal a/d converter

[neil]

Hi Mark,
  I want to test the internal a/d converter of the 52259 chip. I have tied vrefH to 2.5v, and want to simply test one channel, is there an example on how to use this on the demo application?

Thanks
Neil

[mark]

Hi Neil

The file ADC_Timers.h includes code to do this. The fact that you are using 2.5V is not relevant apart for the fact that the result is a fraction of this voltage as given by the formula:

(value measured/ ADC_FULL_SCALE)*(VREFH - VREFL) Volts

where full scale is
#define ADC_FULL_SCALE                  (0xfff << 3)


Regards

Mark