how to boot another board

[Rahul]

hello,

i have developed one board using nRF52832-QFAA and trying to dump simple LED blinking code in it using nRF52 DK board. But code is always dumping into custom board not in my board. i am using P20 connector to dump code, i did connection i.e.

nRF52 DK --> my board

VDD --> VDD

SWDIO --> SWDIO

SWDCLK --> SWDCLK

GND detect --> GND

as it is new board so is there any drivers, soft device or anything is required before dumping code or we can dump code directly.

i am getting output voltage of 2.8V at debug port , is this fine or 3.0V is compulsory.

i am using KEIL MDK 5 , nrf52 DK , SDK11

[RK]

3.0V is compulsory

[Rahul]

yes i have also given 3.0V. but it didnot work

[endnode]

Give us a photo, you probably wire something wrongly. Either Target VDD or GND are not detected and so SEGGER J-Link on Nordic Dev Kit keeps targeting internal nRF5x chip. Don't use long and clumpsy/thin wires.

[Rahul]

hello sir, i have attached photo in the post

[endnode]

And we have a winner:

• Short VDD and VTG pins on P20 (red wire and the next PIN towards SWD lines).
• Power target from first PIN of P20 (VDD nRF).
• Ground target from some real GND PIN on DK nor GND detect (e.g. from P1 header or any other GND).
• Optionally also connect any GND on DK board with last PIN on P20 (GND detect).

By this you power the target properly (GND and VDD detect pins should really detect the power on target but that deosn't mean it also provides these levels!) and also you say to SEGGER J-Link through P20 that there is something to flash.