Energy Probe overview
To capture energy data for Arm Streamline you must have either an Energy Probe or a supported NI DAQ device.
The Energy Probe is designed to be a low impact, inexpensive solution to give application and system software developers quick feedback on the impact of their code on the system energy footprint. It is intended to provide a better understanding of the static and dynamic behavior of the target system for the purposes of debugging, profiling, and analysis. It is not intended to be a high-precision data acquisition instrument for power benchmarking.
The Energy Probe has three power connectors, each of which is designed to connect to a 2-pin header for measuring the power. This allows the energy probe to provide three independent power, current, or voltage measurements.
Figure 11-1 Energy Probe schematic
In addition to the three power connectors, the Energy Probe has a single pin GND connector that must be connected to ground on your target board. It provides a ground connection for the Energy Probe.
Each of the three power connectors measures:
- The current flow through a shunt resistor of a known value on your target system
- The voltage at the positive terminals of the Energy Probe.
Figure 11-2 Energy Probe electrical connection example