JLINK connect fails with new NRF51822 module on BLE400 board. What to do next?

RE: JLINK connect fails with new NRF51822 module on BLE400 board. What to do next?

northernLight — Thu, 07 Feb 2019 07:14:16 GMT

Continues to work :-)

RE: JLINK connect fails with new NRF51822 module on BLE400 board. What to do next?

northernLight — Mon, 21 Jan 2019 23:12:50 GMT

The problem JLink fails to connect disappeared after I reseated the module and debug cable in the motherboard. Though not a very satisfactory resolution, it has now been working for a couple of days . . .

RE: JLINK connect fails with new NRF51822 module on BLE400 board. What to do next?

Kenneth — Mon, 21 Jan 2019 12:27:13 GMT

If you have any nRF51- or nRF52-DK you can also program and debug external boards, provided the external board is using ~3V supply. You may also install the nrfjprog command line tool when using SEGGER:

https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF5-Command-Line-Tools

Just type 'nrfjprog --help' in a command line window for parameters.

Best regards,
Kenneth

RE: JLINK connect fails with new NRF51822 module on BLE400 board. What to do next?

kjhuebner — Sat, 19 Jan 2019 19:14:30 GMT

Hi, my experience with the $20 Segger JLInk MINI programmer was not good. I was programming an Atmel ATSAM chip and the programmer failed to connect after spending hours measuring voltages and signals. I found the solution was to purchase the Segger JLink standard programmer for about $65 from mouser. Within 10 minutes of effort, the programmer worked. The Segger JLink standard programmer is MUCH more robust than the Mini. I avoid the $20 Segger Mini ever since.