Hello,
I just calibrated the current measurement of my J-Link Ultra+ while having nothing connected
J-Link>Calibrate
Please disconnect emulator from target.
Press any key to start the calibration...
Calibrating...Emulator already calibrated.
No re-calibration necessary.
Min=0.0mA Max=0.0mA Avg=0.0mA Offs=0.0mA...DONESo far so good.
Then same with just a 5V to 3.3V LDO connected, so that its quiescent current will not be part of the measurement.
J-Link>Calibrate
Please disconnect emulator from target.
Press any key to start the calibration...
Calibrating...Emulator already calibrated.
Emulator calibrated.
Min=0.0mA Max=70.0mA Avg=14.0mA Offs=14.0mA...DONENumbers are a bit high?, but ok ... after that the current in Ozone was always 0mA (in reality it should be around 1..13mA).
With a bit more load, so I get 20..33mA,I can see the measurements again but as 4..17mA
so I calibrated again with nothing connected:
J-Link>Calibrate
Please disconnect emulator from target.
Press any key to start the calibration...
Calibrating...Emulator already calibrated.
No re-calibration necessary.
Min=0.0mA Max=0.0mA Avg=0.0mA Offs=14.0mA...DONEno noticeable change. So again:
J-Link>Calibrate
Please disconnect emulator from target.
Press any key to start the calibration...
Calibrating...Emulator already calibrated.
Emulator calibrated.
Min=-1.0mA Max=-1.0mA Avg=-1.0mA Offs=-1.0mA...DONEbut that does not change anything and further attempts give the same output.
So I still have an offset of something like -14mA that does not go away and Ozone/J-Link won't display negative numbers so I won't get any useable output at all.
What to do?