Can't download file to nRF51822

[brianbscho]

Hi,

I was using nRF51DK with Keil uVision ver 5.14 and SDK 8.0.0. It worked okay yesterday and I tried HW peripheral as well as BLE peripheral.

But today it doesn't work. Whenever I tried to compile and download file to nRF51822 it shows me error message, saying "No JLink Device found" and "Error: Flash Download failed - Target DLL has been cancelled".

Before I click download button, I was able to see JLINK (E:) device from Computer but as soon as I click download button it disappears (when I unplug and plug it, I can see the device again). I don't know exactly why this issue happens. I was working with 'ble_app_uart_static_passkey' and at one point the issue happens and it never goes away. Can anyone please help me to fix this?

Thanks,

Brian

[MartinBL]

Hi

We see cases like this pretty often. Try to install the latest firmware and drivers as suggested in this thread. See also this thread. These two guys are having issues with the Target DLL. Also please do a search on your error here on the forum. There are several cases with similar issues.

EDIT: Here is another explination on why you'll get the Target DLL error.

[brianbscho]

and one thing I noticed is I directly used Keil, without downloading SoftDevice using nRFgo Studio. I guess it caused some problem.