nRF51822 and J-Link Base connections

RE: nRF51822 and J-Link Base connections

MBlau — Tue, 30 Dec 2014 17:56:44 GMT

@Andrew Lentvorski "I was figuring that there are some magic commands needed in J-Link Commander to get things to work." Do you mean you had to to something else on the software side? If so, what exactly did you need to do?

RE: nRF51822 and J-Link Base connections

jjww — Mon, 08 Dec 2014 06:21:08 GMT

The jlink can program with mother board but not my own board.

RE: nRF51822 and J-Link Base connections

jjww — Mon, 08 Dec 2014 06:20:17 GMT

I got the same problem. but have not fix it with the above method

RE: nRF51822 and J-Link Base connections

Asbjørn — Mon, 17 Nov 2014 10:47:14 GMT

What drivers have you installed for the J-link base? If the programmer doesn't show up at all, then it must be related to drivers of the l-link base. Do you see the programmer in "Device manager" in windows (if you're using Windows)?

There's shouldn't be any commands you have to write to be able to detect it, but the correct drivers must be installed before you are able to use it to program the nRF51.

RE: nRF51822 and J-Link Base connections

Andrew Lentvorski — Sun, 16 Nov 2014 21:18:18 GMT

It's my own board. The J-Link Lite that comes with the eval kits programs the board fine.

When I try to use the J-Link Base, it won't even recognize that the device is present.

I was figuring that there are some magic commands needed in J-Link Commander to get things to work.

RE: nRF51822 and J-Link Base connections

Philip Freidin — Sun, 16 Nov 2014 13:42:57 GMT

Are you trying to use J-Link Base to program a nRF51822 on your own PCB, or the one on the eval board?

If it is the one on the eval board, you will have to disconnect the the embedded Segger. On EK boards V2.0.0, this is done with SW4 and U4. You still have to solder wires to get to SWDIO and SWDCLK, which is pretty tricky.

If this is your own board, then the 4 signals you need are

CPU VCC so J-Link knows what signal levels to use

GND

SWDIO

SWDCLK