PPK with nRF52840 PDK flat line

RE: PPK with nRF52840 PDK flat line

maxx44 — Mon, 30 Apr 2018 21:32:18 GMT

Sorry for the long delay. I finally got around to plugging the PPK onto the nRF52 DK. Appears to work fine measuring power running the blinky example and advertising. It did not appear that the on board LED(s) were included in the power profile.

At this point, I'm assuming the PPK is operating properly and there's some problem connecting the PPK to the PCA10056 board, either my board or in general. I'll leave it up to Nordic to check this and we can close this as answered.

RE: PPK with nRF52840 PDK flat line

wlgrd — Sat, 24 Mar 2018 09:06:25 GMT

I see in this thread, that cutting sb41 was the solution, so disregard my comments about that one.

RE: PPK with nRF52840 PDK flat line

wlgrd — Fri, 23 Mar 2018 17:53:37 GMT

Without making sure, I think sb41 is only for the high voltage setting. Yes, instead of soldering you can also just use a junior.

Yes, cut sb9 and try on that board. The ppk was developed primarily for pca10028 and pca10040, but should work on pca10056 as well.

The external measurements doesn't care what device it is, it can be just a resistor if you want ;)

RE: PPK with nRF52840 PDK flat line

maxx44 — Fri, 23 Mar 2018 17:46:19 GMT

Wilhemsen,

I thought I had originally tried the PPK on the PA10056 board with just SB40 cut and wasn't getting any results. Then some online research seemed to indicate I had to also cut SB41, so I did that. From your reply, this seems to have been misinformation? I can revisit this and try resoldering SB41. But I was under the impression that putting a jumper on the VDDH connector would have the same effect. Is this correct? That would be easier than soldering.

Are there schematics available for the PA10056 board?

The only other board I have to try is a PCA10040 1.2.1 also just purchased. I can try that with the PPK is you think it would help. This will require cutting SB9, correct?

The power readings I mentioned above were taken off a non-Nordic board with a BLE module advertising at 100 msec intervals. The readings I got appeared to be what I expected, but I didn't try to verify with a meter or other instrument. TBD.

Thanks, Max

RE: PPK with nRF52840 PDK flat line

wlgrd — Fri, 23 Mar 2018 14:11:56 GMT

The PPK should only be able to measure on the VDD domain, not the VDDH. Could you try to resolder SB41 and see if that makes a difference at all? Not saying it will, just curious before we move forward. Is the PPK working with other DK-s (nrf51, 52830)?

RE: PPK with nRF52840 PDK flat line

ketil — Fri, 23 Mar 2018 09:47:09 GMT

Hi Max,

Great to know that you have the PPK up and running!

Do you still require help with the nRF52840 PDK?

Ketil

RE: PPK with nRF52840 PDK flat line

maxx44 — Mon, 19 Mar 2018 21:30:36 GMT

I was able to connect a different development board with a BLE module to the external DUT connector. I can get current readings and see the BLE advertising pulses from this board. So it seems my PPK is operational and the interface to the nRFConnect Power Profiler is working.

RE: PPK with nRF52840 PDK flat line

maxx44 — Mon, 19 Mar 2018 19:15:26 GMT

Thanks.

As some additional information, I have PPK model PCA63511 Rev. 1.1.0 just purchased with the nRF52840 PDK PCA10056 0.9.3.

I tried a single trigger at on the PPK at 1 mA, and it just says "Waiting". I switched to 1uA and got the same thing. This seems to me to indicate the PDK is not getting connected. I have another BLE board I will try to connect as an external DUT to verify the PPK is showing any signs of being able to measure something.

RE: PPK with nRF52840 PDK flat line

ketil — Mon, 19 Mar 2018 12:50:32 GMT

Hi,

We are looking into your issue and will get back to you as soon as possible.

Ketil