J-link OB cannot find nRF52811 on custom board

RE: J-link OB cannot find nRF52811 on custom board

Sigurd — Fri, 17 Jul 2020 11:54:30 GMT

[quote user="bardia3000"]does jlink need a firmware update to support nrf52811?[/quote]

I believe support for nRF52811 was added in Jlink V6.44. You could try to download the latest version J-Link Software and Documentation Pack from https://www.segger.com/downloads/jlink/

RE: J-link OB cannot find nRF52811 on custom board

bardia3000 — Fri, 17 Jul 2020 11:42:29 GMT

I tried both jlink ob and jlink pro, I also set it's voltage target to both 3v3 and 1v8, does jlink need a firmware update to support nrf52811? beacause an almost same pcb with nrf52832 works fine.

RE: J-link OB cannot find nRF52811 on custom board

Sigurd — Fri, 17 Jul 2020 10:58:28 GMT

[quote userid="74854" url="~/f/nordic-q-a/63688/j-link-ob-cannot-find-nrf52811-on-custom-board"] JLink OB as programmer.[/quote]

What JLink OB is this ? Is it the one located on a nRF52-series DK ? If yes, what DK did you try ? nRF52832DK, nRF52840DK, etc ?

For e.g. nRF52840 DK we have this note about programming external boards:

Note: The voltage supported by external debugging/programming is VDD voltage. Normally, this is 3 V when running from USB, but if the onboard nRF52840 SoC is supplied from either USB or Li-Ion, the nRF power source switch (SW9) is in either Li-Po or USB position, and VDD can be set by the nRF52840 firmware. Make sure the voltage level of the external board matches the VDD of the nRF52840 DK.

RE: J-link OB cannot find nRF52811 on custom board

bardia3000 — Fri, 17 Jul 2020 10:07:46 GMT

1) Yes all borads are the same.

2) No there are some other chips which must be powered with 1v8.

3) I double-checked it, It is okay

RE: J-link OB cannot find nRF52811 on custom board

Sigurd — Fri, 17 Jul 2020 09:03:11 GMT

[quote user="bardia3000"]but still the same problem happens, It cannot find the nrf52811.[/quote]

1) Do you see this issue on several custom boards, or is it only one board ?

2) Could you try to power it at 3V, and see if you are able to program it then ?

3) Also make sure that you have not accidentally switched SWDCLK and SWDIO when connecting the debugger.

RE: J-link OB cannot find nRF52811 on custom board

bardia3000 — Fri, 17 Jul 2020 08:26:17 GMT

There was a problem about this pin, I solved It, It was connected to another chip, but It can be unsoldered, now the NRST is high, but still the same problem happens, It cannot find the nrf52811.

RE: J-link OB cannot find nRF52811 on custom board

Sigurd — Fri, 17 Jul 2020 07:57:34 GMT

Hi,

[quote userid="74854" url="~/f/nordic-q-a/63688/j-link-ob-cannot-find-nrf52811-on-custom-board/259986"]Is it normal for the P0.21/nRST to be Low in this situation?[/quote]

No, in this situation the pin should not be low.

Do you see this issue on several custom boards, or is it only one board ?

RE: J-link OB cannot find nRF52811 on custom board

bardia3000 — Thu, 16 Jul 2020 17:58:24 GMT

Sorry Sigurd, Is it possible to answer me?

RE: J-link OB cannot find nRF52811 on custom board

bardia3000 — Tue, 14 Jul 2020 19:01:19 GMT

By the way, I checked voltage on all pins, It is a bit strange that P0.21/nRST is Low( while I used pull up resistor on it) and also I've never program it, So this GPIO shouldn't be configured as an active-low Reset!

Is it normal for the P0.21/nRST to be Low in this situation?

RE: J-link OB cannot find nRF52811 on custom board

bardia3000 — Tue, 14 Jul 2020 12:20:56 GMT

I also run "it as administrator" with J-link OB:

and this is the log file:devzone.nordicsemi.com/.../2211.log.log

RE: J-link OB cannot find nRF52811 on custom board

bardia3000 — Mon, 13 Jul 2020 14:34:44 GMT

No I can't recover the device.

nRF52811 is powering with 1v8, by the way I checked the programmer, It can program a nrf52832 (powered with 1v8) on another board correctly!

I also tried Segger J-Flash (and I change the programmer device): Here is the result of Log:

Connecting ...
- Connecting via USB to probe/ programmer device 0
- Probe/ Programmer firmware: J-Link V9 compiled Jun 2 2222 22:22:22
- Device "NRF52811_XXAA" selected.
- Target interface speed: 4000 kHz (Fixed)
- VTarget = 1.790V
- InitTarget() start
- InitTarget() end
- InitTarget() start
- InitTarget() end
- ERROR: Failed to connect.
Could not establish a connection to target.

and after I changed the speed to auto mode:

Connecting ...
- Connecting via USB to probe/ programmer device 0
- Probe/ Programmer firmware: J-Link V9 compiled Jun 2 2222 22:22:22
- Device "NRF52811_XXAA" selected.
- InitTarget() start
- InitTarget() end
- InitTarget() start
- InitTarget() end
- Target interface speed: 200 kHz (Auto)
- VTarget = 1.815V
- InitTarget() start
- InitTarget() end
- InitTarget() start
- InitTarget() end
- ERROR: Failed to connect.
Could not establish a connection to target.

RE: J-link OB cannot find nRF52811 on custom board

Sigurd — Mon, 13 Jul 2020 14:09:36 GMT

[quote user="bardia3000"]Unfortunately it is the same as before.[/quote]

Are you able to recover the device using nrfjprog ?

nrfjprog --recover

What voltage are you powering the nRF52811 with?

RE: J-link OB cannot find nRF52811 on custom board

bardia3000 — Mon, 13 Jul 2020 11:18:09 GMT

Unfortunately it is the same as before.

RE: J-link OB cannot find nRF52811 on custom board

Sigurd — Mon, 13 Jul 2020 07:31:38 GMT

Hi,

[quote user=""]Whenever I try to connect to nRF52811 on the board[/quote]

Looking at the screenshot attached, you seem to be using a project that is configured to be used for the nRF52840.

Please try the pca10056e project instead. For the ble_app_blinky project, see the project in the folder SDK_folder\examples\ble_peripheral\ble_app_blinky\pca10056e\s112\ses

You might find the Developing for nRF52811 user guide useful. See this link: infocenter.nordicsemi.com/.../nrf52811_user_guide.html