Programming nRF52840 SOC with SWD

RE: Programming nRF52840 SOC with SWD

Amanda Hsieh — Mon, 15 Jun 2020 11:02:41 GMT

Hi Nikos,

[quote user="Nikosant03"]by only using SWDIO and SWDSLK I can both debug and connecting via RTT right?[/quote]

You should need (SWDIO, SWCLK, VCC and GND). In the project, you should enable the Log RTT backend configuration. See debugging with real-time terminal.

-Amanda H.

RE: Programming nRF52840 SOC with SWD

Nikosant03 — Mon, 15 Jun 2020 09:31:40 GMT

Hi Amanda,

Thank you for your support. Yes I mean connecting via RTT. So, by only using SWDIO and SWDSLK I can both debug and connecting via RTT right?

RE: Programming nRF52840 SOC with SWD

Amanda Hsieh — Mon, 15 Jun 2020 07:53:42 GMT

Hi Nikos,

[quote user=""]SWO pin is enough for visualing data (e.g using PUTTY)?[/quote]

Not sure what you mean by "visualing data (e.g using PUTTY)". Do you mean Connecting via RTT? RTT works over SWD, no need for SWO. As far as I know, SWO is the Serial wire output trace of ITM data. Please see Debug and trace.

-Amanda H.

RE: Programming nRF52840 SOC with SWD

Nikosant03 — Fri, 12 Jun 2020 13:52:14 GMT

Thank you Amanda for your assistance so far,

Sure, I will wait for your complete answer.

Nick

RE: Programming nRF52840 SOC with SWD

Amanda Hsieh — Fri, 12 Jun 2020 13:34:54 GMT

Hi Nikos,

[quote user=""]I am correct so far? [/quote]

Yes, you should only need (SWDIO, SWCLK, VCC and GND) to program the device. Also remember to power your nRF52 device!

VDD: Reference voltage for programmer
SWDIO: Serial wire debug data
GND: Ground
SWDCLK: Serial wire debug clock

[quote user=""]SWO pin is enough for visualing data (e.g using PUTTY)?[/quote]

Will give complete answer next week.

[quote user=""]Are these equipement enough for programming the nRF52840 IC?[/quote]

Yes, you also could use nRF52840 DK to connect your custom board to debug. Please see Debug output.

[quote user=""]What is the purpose of this pin on the SDW connector?[/quote]

You don't need RESET pin to program/debug. You can do softreset if you don't have access to the RESET pin. RESET pin is optional on nRF52, you can actually disable RESET and use the pin as normal GPIO pin.

[quote user=""]Should I use these resistors? Maybe they are included inside the MDBT50Q-1MV2 module?[/quote]

No, Please see Debug and trace/Electrical specification, nRF52840 already has internal SWDIO and SWDCLK pull up/down resistance.

-Amanda H.