Other Parts Discussed in Thread: LAUNCHXL-CC26X2R1, ENERGYTRACE
I'm trying to use the LaunchXL-CC26X2R1 board to measure the current consumption of a custom board which uses the CC2650MODA. I can successfully use the LaunchXL to program the custom board (using the RF Flash programmer) and debug the sensor controller (using the SensorController Studio). I have the LaunchXL connected to the custom board using the 10pin ribbon cable.
When I remove the 3V3 and RXD jumpers, the currents are zero.
When I remove the "XDS110 Power" jumper, the currents are implausibly high.
With the 3V3, RXD and "XDS110 Power" jumpers in, I see pulses of current every 100ms. I do have a task running on my custom board with a period of 100ms. When I change that period to 200ms, I can see by LED toggles that it has changed, but my current waveforms do not change.
1) should it be possible to use the LaunchXL and EnergyTrace to measure the current on an external board connected by ribbon cable?
2) what should the jumper settings be? The SWRA478 says to take them all out but that makes my current readings zero.
3) what configuration option or jumper tells the LaunchXL to measure the external current and not the current of the on-board CC26X2R1?