I'm new to this processor family and need a bit of help understanding the pin setup.
I am using the DEVKIT-S12ZVC. I want to do a simple read of a pin.
I have the following code but fear there is more or I am doing something extra.
// Data Direction Register (Associated pin is configured as input)
DDRADH_DDRADH0 = 0;
DDRADH_DDRADH1 = 0;
// Digital Input Enable Register (Associated pin is configured as digital input)
DIENADH_DIENADH1 = 1;
DIENADH_DIENADH0 = 1;
// Port ADH Pull Device Enable Register (Pull device enabled)
PERADH_PERADH0 = 1;
PERADH_PERADH1 = 1;
//Port ADH Polarity Select Register (Pulldown device selected)
PPSADH_PPSADH0 = 1;
PPSADH_PPSADH1 = 1;
if(PTADH_PTADH1 != PTADH_PTADH0)
I can understand setting the pull down since the DEVKIT has a capacitor on those lines.
Setting the Digital Register is to enable the digital function and disable the analog function.
ADH and AHL are the only ports with the Digital Register.