Hello Cameron thanks for the quick response, I typically use the forum as a help guide and typically I find many of my questions answered by others who previously had a problem. In this case I could not find and assistance ( sorry for the formatting error, Don't really send messages ) Below is the schematic of the circuit I'm connecting to the MSP432 at C1.0, I currently measuring a constant level of VCC, it should be at GND level as the resistor value is 100K, to remove any parasitic charge at the input. I used a variable resistor at C1.1 (V- of OP-AMP) to control the voltage, so I can set my own trigger level point. When the light beam is broken at the phototransistor, this will create a pulse. and with the Variable resistor I can control when to trigger depending on pulse height. By the COMP_E diagram it appears I'm still getting the VCC from (See RED LINE) voltage generator (CERSEL) CE1CTL2 CEREFL (14~13) is set to 00b ( Reference amplifier is disabled ), but I get a voltage V+ input.
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