Hi,
I'm using an F28069 controller card attached to a TI Docking Station USB EMU (R3) and a custom motor controller based off of the DRV8301 EVM board made by D3 Engineering.
Anyways, I'm trying to use PM_Sensorless to control a 3 phase BLDC motor. I've confirmed that Level 1 for the program works and I'm in the process of getting the current measurements to the ADC. In the D3 schematic for their board, they use a differential amplifier to step up the voltage across their shunt resistor. However, instead of tying the positive side of the op amp to ground, they tie it to a 1.65V reference voltage. Correct me if I'm wrong, but this means that when the current is 0A, the output will be 1.65V which will then go to the ADC. Is this correct?
If it is, then does that mean that PM_sensorless is only using values in the ADC between 1.65V and 3.3V for current measurements?
I've attached a snippet of the circuit: 
Thanks,
Bryce