nRF52832 custom board, chip not getting detected

RE: nRF52832 custom board, chip not getting detected

MartinBL — Mon, 29 Oct 2018 13:02:58 GMT

Serial Wire Debug (SWD) has nothing to do with Serial COM port (UART) and to program an nRF52 device you need SWD (a serial port is an optional feature). With external programmers like yours, you won't see "Serial port: COMx" listed in the nRF Connected apps. The latest version of nRF Connect Programmer should support JLink EDU Mini anyway, although we haven't tested this specific programmer.

Do you have problems programming or are you just wondering why you don't get a serial port?
Do you get any error messages in the Log window?
Can you confirm that you have connected VDD and GND on your board to VTref and GND on the JLINK EDU?

If you are having problems programming, I suggest that you try nrfjprog as Turbo J mentioned, just to rule out any issues with nRF Connect Programmer.

RE: nRF52832 custom board, chip not getting detected

Turbo J — Sun, 28 Oct 2018 15:31:00 GMT

Your choice of software seems weired, just use either the nrfjprog command line tool or nRFGo studio. Both support programming via SWD.

You can also use the JLInk Commander to manually check wether it can connect to the target MCU. I use this when I'm suspecting cabling problems.

RE: nRF52832 custom board, chip not getting detected

AshokY — Sun, 28 Oct 2018 12:33:13 GMT

my JLink does support SWD. I connected SWDIO and SWDCLK pins from JLink to the nRF52832.

I followed the diagram explained in the thread,

https://devzone.nordicsemi.com/f/nordic-q-a/20536/programming-external-custom-nrf52832-board-using-nrf52-dk

to connect jLInk to the custom board.

Do I additionally need to connect serial port from custom board to flash boot loader to make it detected via SWD by JLink?

Thanks,

AshokY

RE: nRF52832 custom board, chip not getting detected

Turbo J — Sat, 27 Oct 2018 21:24:55 GMT

Your Jlink Mini probably does not support the serial port. It would also need additional wires to the NRF chip (RX and TX for the UART).

Speaking of wires: You need VCC (might be called VRef on the JLink) and GND in order to be able to talk to the NRF chip via SWD.

RE: nRF52832 custom board, chip not getting detected

droghio — Sat, 27 Oct 2018 20:28:47 GMT

Are you trying to upload using a serial bootloader or just flash using the SWO lines? Either way I would just try uploading one of the sample programs using the JLink to ensure the device is communicating correctly.