Target NRF51822 QFAA
Board Waveshare BLE400
The board is powered from its USB port (+regulator)
I am trying to connect for the first time using Jlink Edu Mini and a Win10 platform
I had planned to flash softDevice and then Blinky using Segger Embedded Systems. However neither SES nor JLINK Commander can establish connection with the device
How could I get more details on the error log? Attached is the transcript from Commander. I get the same result when I reduce the speed of the JLINK comms to 1000kHz
After failing to connect I tried to erase the factory firmware using nRFgo Studio and got the error:
Recover failed:
Can not connect to the device
With a DVM I measured VCC on the NRF51822 module at 3v3 (good)
I probed with a scope SWDIO and SWD (SWCLK?) which are brought out on a header on the motherboard. There is clearly traffic during the 'connect' dialog, i.e. SWDIO switches 3.3V<>0V several times. What should I be looking for?
How could I further diagnose (and hopefully fix) the problem?
I expect that the NRF51822 module is simply not working, but this would be surprising since it is new
Any help would be much appreciated!
Many thanks
SEGGER J-Link Commander V6.40 (Compiled Oct 26 2018 15:06:29) DLL version V6.40, compiled Oct 26 2018 15:06:02 Connecting to J-Link via USB...O.K. Firmware: J-Link EDU Mini V1 compiled Oct 26 2018 12:05:31 Hardware version: V1.00 S/N: 801005893 License(s): FlashBP, GDB VTref=3.281V Type "connect" to establish a target connection, '?' for help J-Link>connect Please specify device / core. <Default>: NRF51422_XXAC Type '?' for selection dialog Device>? Please specify target interface: J) JTAG (Default) S) SWD T) cJTAG TIF>S Specify target interface speed [kHz]. <Default>: 4000 kHz Speed>4000 Device "NRF51822_XXAA" selected. Connecting to target via SWD Cannot connect to target. J-Link>
