jlinkarm.dll not found keil

[Lalit Kumar]

Hi,
I am trying to upload dual_bank_ble_s110 example on nrf51-dk using Keil. But it shows error:

C:\Program Files (x86)\Nordic Semiconductor\nrf5x\bin\nrfjprog.exe --family NRF51 --program "C:\Users\katph\Documents\Keil\dfu\bootloader\pca10028\dual_bank_ble_s110\arm5_build\nrf51422_xxac.HEX"

I copied the JLinkArm.dll file from segger folder to nrfjprog folder, to _build folder without success.
I am able to upload files using nrfgo studio, so what exactly am I missing here? Also if I am to use nrfgo Studio, what should I upload the hex file as, bootloader or application? I've uploaded as both, and the uploading as bootloader seems to be working. And thats confusing as I was expecting it to be an application.
Thanks in advance for help :)

[Anders Strand]

Is what you have pasted the whole error message? It looks like it is only the command executed. Have you assured that you have installed nrfjprog in the path you posted? It is bundled with the nrfTools which can be downloaded from our website. The hex file is a bootloader, and it therefore makes sense that it worked to flash it as one. You can see that it is inside the bootloader folder in the path you posted. Have you checked out the DFU tutorial?

[Lalit Kumar]

I followed your nrfTools link and updated my current setup. I am able to upload the program now. But it requires that I erase the flash first, why? Also in the tutorial mentioned, it just demonstrated a use case, is there any tutorial where dfu is explained in details, or will I have to rely on the infocenter for it? Thanks for the reply :)

[Anders Strand]

The BLE DFU Bootloader description on infocenter.nordicsemi.com provides a lot of information on the subject.