Concurrent system and subsystem power measurements with Otii

There are cases when you need to do two concurrent power consumption measurements to get a good understanding of what is going on in your system. In this video we will show you how to use the ADC pins in the expansion port to accomplish this with Otii.

The ADC pins can digitize a voltage between -81.9175 mV and +81.2 mV. It also measures the voltage from ADC+ to ground. By inserting a suitable resistor in series to the power feed of the sub-system you want to measure, and connect both ends to the ADC input pin, you are able record and display this power consumption in parallel to the main current.

For this tutorial we used Cypress CY5672 Remote Control Reference Design Kit.