nRF51922 (PCA10022)

[Rasit Eskicioglu]

Hi,

I am trying to program the sample application given in sdk_nrf519_addon_v0.2.0-1.beta.zip file, and following the instructions in the readme.txt. However, when I try to download the code to the module, I get:

***JLink Error: Supply voltage too low (1 Volt is required, Measured: 0.1 Volt).
Please check target power.
Error: Flash Download failed  -  Target DLL has been cancelled

What I am missing?

My setup:

The latest Keil uVision 5, nRF51 sdk 4.4.1 with the above addon.

j-link edu with olimex 20-pin to 10-pin adapter.

Thanks,

--Rasit

[Rasit Eskicioglu]

I also would like to know what type of ext antenna (specs) I should use.

Thanks,

--Rasit

[Ole Morten]

This error indicates that the J-Link can't see that your chip is powered. If you use the module without an nRFgo Starter Kit, you must make sure that you connect the power appropriately, which is easiest done as explained here.

[Rasit Eskicioglu]

Sorry, I should've indicated in my original post that I'm using the nRFgo Starter kit. I tried powering the kit both from the usb (VBUS) and with 12V external power (VSupply). There results were the same, indicating that the problem is elsewhere.

--Rasit

[Rasit Eskicioglu]

Hi,

It seems I had a bad cable;-( After replacing the SWD cable, I was able to flash the module.

One question remains, though. I did not get an external antenna with the module. Can someone tell me what type of antenna I should buy?

Thanks,

--Rasit

[Marc Nicholas]

Any 2.4Ghz "rubber ducky" should be fine. That's basically what's in the base dev kit.

Something else that causes the problem you saw was not ensuring that Keil/Jlink is set to SWD. If it hasn't autosensed properly, it can still be set to JTAG in the Programmer section of Keil.

-m