External Programming with nRF5-DK P20

RE: External Programming with nRF5-DK P20

Santosh Kumar — Sun, 27 Mar 2022 10:26:29 GMT

Hi,

I have this exact setting for a nRF52810 custom board programmed from nRF52840 DK.

But every time, Keil programs the chip in the DK and doesn't recognize the custom board.

Any hints on this?

Thanks,

Santosh

RE: External Programming with nRF5-DK P20

Anne van Rossum — Wed, 09 Oct 2019 09:40:38 GMT

Ah, never mind! It's just the same when nothing has been changed. I see now in Figure 7. Power supply circuitry. It's meant to be able to current measurements by adding R6 and cutting SB9 as described in 6.9.1 and 6.9.2.

RE: External Programming with nRF5-DK P20

Anne van Rossum — Wed, 09 Oct 2019 09:33:16 GMT

Hakon What's actually the difference between the first setup and the second? In other words, between VDD nRF (pin 1) and VDD (pin 2). Does the former provide more power to an external board? I couldn't find it in https://infocenter.nordicsemi.com/pdf/nRF52_DK_User_Guide_v1.2.pdf where actually pin 2 is labelled RESET in section 6.1. Hardware Drawings.

RE: External Programming with nRF5-DK P20

DanKA — Tue, 17 Jul 2018 11:12:59 GMT

Hi,

I can confirm that this schematic works
(physically wired P20:GND Detect --> P1:GND and then P1:GND -->Custom Board:GND) :

Unfortunately, I have no further details to add. As I mentioned in my post, there was soldering issue. I was able to use all functions of the device after resoldering.

Have you tried nrfjprog and J-Link commander?

RE: External Programming with nRF5-DK P20

Duncan Xu — Tue, 17 Jul 2018 01:53:28 GMT

I set up the wire according to your schematic on the right, and had the same issue in nrfgo studio, no device detected. Can you tell me how you make it work with a little bit more details?

Appreciate it.

RE: External Programming with nRF5-DK P20

Håkon Alseth — Thu, 22 Mar 2018 11:58:14 GMT

Good to hear that you found the source of the issue!

Cheers,

Håkon

RE: External Programming with nRF5-DK P20

DanKA — Thu, 22 Mar 2018 07:23:44 GMT

Hello Hakon,

i captured a screenshot from nRFgo Studio which i attached

As i said, the nRF-DK seems to reset. So the Output disappears. Using nrfjprog --program is basically the same message:

ERROR: Cannot connect to any nRF device. Please make sure the device is
ERROR: connected to the debugger and supplied.

Using nrfjprog --recover, it takes a while and then this is displayed:

Recovering device. This operation might take 30s.
ERROR: Cannot connect to any nRF device. Please make sure a device is
ERROR: connected to the debugger and supplied.

In Addition, the Dialog from J-Link commander. I tried with different Speed.

Type "connect" to establish a target connection, '?' for help
J-Link>connect
Please specify device / core. <Default>: NRF51822_XXAA
Type '?' for selection dialog
Device>?
Please specify target interface:
J) JTAG (Default)
S) SWD
TIF>S
Specify target interface speed [kHz]. <Default>: 4000 kHz
Speed>100
Device "NRF52832_XXAA" selected.

****** Error: Communication timed out: Requested 20 bytes, received 0 bytes !
Could not read hardware status!
Can not connect to target.

I tried with different DKs and multiple custom boards. I measure 2.85V on VDD_nRF of custom board, P20.2 and P20.3. I tried with these wirings, with and without external supply.

I made one board, for nRF51822 and another for nRF52810/52832. Schematics and Layout are close to the ref layout. SWDCLK is not pulled down:

devzone.nordicsemi.com/.../nRF51822_5F00_Pi_5F00_Meander.sch-_2800_1_2900_.pdf devzone.nordicsemi.com/.../nRF52810_5F00_Pi_5F00_Meander.sch.pdf

Any help how to debug this is appreciated.

Thank you and kind regards

DanKa

Update:

It seems that there was a soldering problem. I am able to program the blinky Project. Further testing in Progress.

The wiring of the second picture worked for me - no battery connected.

RE: External Programming with nRF5-DK P20

Håkon Alseth — Wed, 21 Mar 2018 14:08:33 GMT

That is strange.

Have you tried using nrfjprog (from cmd, "nrfjprog --program <hex> --sectorerase"), or using J-Link Commander from the segger utils?

Cheers,

Håkon

RE: External Programming with nRF5-DK P20

DanKA — Wed, 21 Mar 2018 10:11:04 GMT

I am not sure if i understand you correctly:

P20 Pin 2 VDD and Pin 3 to VDD of custom board OR just shorting Pin 2 and Pin

I understand you as:

Custom Board powered by VDD_NRF (P20, pin 1), no battery.
P20 Pin 2 VDD and Pin 3 VTG shorted, no Connection to custom board
P20 Pin 4 SWDIO to SWDIO of custom board
P20 Pin 5 SWD CLK to SWD CLK of custom board
P20 Pin 8 GND DETECT shorted with GND (to supply) to GND of custom board.

Is that correct?

Edit:

I did it as i mentioned above. With this setup i do not detect the inernal nRF5 anymore (as wanted), but if click on the SEGGER in nRFgo Studio, the nRF-DK resets. nRfgo Studio seems to Output a report or something but it disappears immediately. Something with no device detection...Is there a log or something? i can't read it in nRFgo Studio directly.

Kind regards

RE: External Programming with nRF5-DK P20

Håkon Alseth — Wed, 21 Mar 2018 09:54:13 GMT

Hi,

You'll need to apply voltage to the "VTG" pin on header P20 (pin 3).

You can do this by shorting P20, pin 2 and 3, as this will force the segger IC to externally program on P20.

You can then power your external board from "VDD_NRF" (P20, pin 1), just remember to remove the battery first.

Could you try this and see if you have any luck?

Best regards,

Håkon