SW device "no target connected " nRF52840

RE: SW device "no target connected " nRF52840

Håkon Alseth — Tue, 10 Jan 2023 08:43:53 GMT

Hi,

Great to hear that the programming/recovering is now working!

Kind regards,

Håkon

RE: SW device "no target connected " nRF52840

Marcos Tadeo — Mon, 09 Jan 2023 15:22:47 GMT

Hello

i did it, you right , i used the command nrfjprog --recover using a j-link debugger and now my IDE detected the micro i can program it also

thanks and regards

RE: SW device "no target connected " nRF52840

Marcos Tadeo — Wed, 04 Jan 2023 17:59:03 GMT

[quote userid="2115" url="~/f/nordic-q-a/95058/sw-device-no-target-connected-nrf52840/403169"]are you certain that it enumerates properly as a J-Link device?[/quote]

I have these one

segger web site

Converting ST-LINK On-Board Into a J-Link

I will buy a J-link debugger, and im going to try again

thanks and regards

RE: SW device "no target connected " nRF52840

Håkon Alseth — Wed, 04 Jan 2023 12:06:38 GMT

Hi,

[quote user="Marcos Tadeo"]Can I do it using hardware (pin P0.18 press reset)? [/quote]

No, you will need to issue SWD AP commands over the SWD interface to recover the nRF.

[quote user="Marcos Tadeo"]I tried to convert stlink to jlink also, no changes the result [/quote]

The picture that you posted shows that nrfjprog cannot find any jlink capable debuggers. are you certain that it enumerates properly as a J-Link device?

If you have a nRF5-series DK, you can use that as a debugger.

Kind regards,

Håkon

RE: SW device "no target connected " nRF52840

Marcos Tadeo — Tue, 03 Jan 2023 22:54:35 GMT

hello,

thank you for your reply

Can I do it using hardware (pin P0.18 press reset)? if no, then i need to buy a segger debuger

becasue im using ST Link v2, I tried to send the command but not works,

I tried to convert stlink to jlink also, no changes the result

thnaks and regards

RE: SW device "no target connected " nRF52840

Håkon Alseth — Mon, 02 Jan 2023 09:55:23 GMT

Hi,

With newer IC revisions of the nRF52-series, an improved APPROTECT has been implemented, meaning that a recover must be performed first in order to open up the device. Please see this informational notice for more details:

https://infocenter.nordicsemi.com/pdf/in_141_v1.1.pdf?cp=4_0_2_7

This effectively means that you need to issue an ERASEALL command first, then program your firmware. I would recommend that you reach out to the openocd community to ask if this feature is implemented.

If you use a segger based debugger, you can use "nrfjprog --recover" and "nrfjprog --program <hexfile> --sectorerase --verify" to program.

Kind regards,

Håkon

RE: SW device "no target connected " nRF52840

Marcos Tadeo — Thu, 29 Dec 2022 17:01:08 GMT

Hello

I was checking the circuit and i did some modifications , now i was traying to add a bootloader to my IC

i have seen the tutorial

the cmd shows this error

i saw the datasheet nrf52840

and this post also

Disabling CTRL-AP for nRF52840 DK does not work for new nRF52833 board

i didn't catch that , how can i disable CTRL -AP, i was thinking that is the reason that i cant to program my IC, because according to the post , "The newest revision devices (with improved APPROTECT) always requires a recover as the first step to program a blank IC (as it is locked by default, and the recover unlocks it, allowing you to write to the UICR and include firmware that unlocks it semi-permanently)."

can you help me ?

thanks regards

RE: SW device "no target connected " nRF52840

ketiljo — Fri, 23 Dec 2022 09:40:26 GMT

[quote user="Marcos Tadeo"]yes, we checked the power supply and its ok apparently , 1.8v in "VDD nrf" tag[/quote]

Check if the debugger supports 1.8 V. Not all does that.

You can program the device using the SWD interface without any bootloader.

RE: SW device "no target connected " nRF52840

Marcos Tadeo — Thu, 22 Dec 2022 17:49:30 GMT

Hello

thanks for your reply

[quote userid="2125" url="~/f/nordic-q-a/95058/sw-device-no-target-connected-nrf52840/401854"]There's no bootloader in the nRF52840 when it hasn't been programmed before. [/quote]

do you mean that i can charge my code without flashing a bootloader before?, I customized a board for nrf52840 and I bought a Chip micontrollorer with Nordic distributors

I was testing whit nrf52840 dk generic over SWDIO and SWCLK with st link v2 debugger, no problem

when i created a custom board the keil IDE no detected the micro , my custom board has not been programmed before,

im following this tutorioal:

www.youtube.com/watch

Does nRF52840 need Bootloader for the first time?

sorry my english grammar is not good

RE: SW device "no target connected " nRF52840

ketiljo — Thu, 22 Dec 2022 08:55:20 GMT

There's no bootloader in the nRF52840 when it hasn't been programmed before. What programmer are you using? If it's the ST-Link, it may or may not work. Hard to say as it's not supported.

Download this: https://www.nordicsemi.com/Products/Development-tools/nrf-command-line-tools/download

and write nrfjprog --recover

RE: SW device "no target connected " nRF52840

Marcos Tadeo — Wed, 21 Dec 2022 16:16:57 GMT

Hello

yes, we checked the power supply and its ok apparently , 1.8v in "VDD nrf" tag
I saw a post says the chip dont have a "bootloader " precharged, then that reason i cant to program the microcontroller , is this correct?

i was thinking, didnt need to do it

if yes , how can i do that ?

thanks and regards

RE: SW device "no target connected " nRF52840

Senchoi — Wed, 21 Dec 2022 04:52:03 GMT

Are you supplying the power to the device? As debuggers don't supply power when connected, I guess it could be a similar issue.