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]

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