nrf51 DK JLink not detected by Keil

[Andreas]

My nrf51 DK Board is not detected by Keil as jlink probe, but with other tools. As a result I am unable to download demo projects to my board.

1. unmodified nrf51 dk has been equipped with jlink .bin file via USB bootloader (J-Link OB-SAM3U128-V2-NordicSemi 140918.bin)
2. nrf51 dk is detected as Segger xxxxxx in nRFgo Studio
3. nrf51 dk is detected by segger j-link configuration tool
4. Keil download attempt fails with "No JLink Device found"
5. Keil uVision V5.13.0.0 does not detect jlink under project/options/debug
6. Keil JLink Cmd button detects JLink and reports Cortex M0 of nrf51422 in DOS box
7. Windows Restart did not help
8. a second nrf51 dk hardware shows same behaviour
9. I tried segger 4.96d/f, Keil and nrf Installations in all sequence (incl. manual removal of related folders on HDD and computer restarts)
10. By now there are 4 segger entries that cannot be removed by windows anymore (see picture)
11. Some installled Keil driver seems to be pretty old and seems to be reinstalled everytime Keil 5.13 is installed (see picture)
12. During segger installation I am now getting an install error (see picture)

Please help in getting toochain working properly. Any hints appreciated.

Thanks very much in advance.

[Nguyen Hoan Hoang]

Have you clicked on the setting button after you selected the JLink ? You need to press setting for Keil to retrieve the Jlink serial # ... to connect to. Would not operate if not pressed that button at least once. You only need to do it once.

[Andreas]

Thanks very much for your response. I touched the button earlier and did it again on your suggestion, but unfortunately it did not work.

My feeling is that it is project setting related: blinky and two ANT sensor applications would not work while just now the experimental ANT bootloader example showed up with a DOS box on programming. Build output shows erased pages, programming and applying system reset. Sensor projects still won't download.

[Nguyen Hoan Hoang]

Perhaps you can try to update to the latest driver from segger. I have both DK and EK. They all work fine under Windows and Mac (no Keil on OS X though). Ver 4.94 and above works fine, bellow that bad.

[Andreas]

Thanks again, but my machine is already using dll version 4.94.

By the way, bootloader example project downloads because of "Use external tool for flash programming" --> nrfjprog.exe

[Nguyen Hoan Hoang]

Try installing Keil first. Then the latest jlink software. During the jlink installation process you will get a prompt to update DLL ... Select keil and update the DLL. Jlink will then update Keil driver with the new dll.

[Andreas]

Thanks, I have uninstalled all segger and keil related stuff. Then installed Keil 5.13, followed by segger 4.96f. Still no sucess...