My nRF52840-DK stopped working. When trying to connect using nRF Programmer v2.2.0 I get the following in the log:
15:45:05.011 Using @nordicsemiconductor/nrf-device-lib-js version: 0.4.115:45:05.012 Using nrf-device-lib version: 0.9.815:45:05.012 Using nrfjprog dll version: 10.15.115:45:05.012 Using JLink version: 7.60e15:45:05.448 Application data folder: /Users/dev/Library/Application Support/nrfconnect/pc-nrfconnect-programmer15:45:16.671 Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device.15:45:16.671Please make sure J-Link Software is installed. See https://github.com/NordicSemiconductor/pc-nrfconnect-launcher/#macos-and-linux
I have tried to connect also with JFlash but I get this:
Application log started - J-Flash V7.60e (J-Flash compiled Jan 20 2022 11:11:07) - JLinkARM.dll V7.60e (DLL compiled Jan 20 2022 11:10:57)Reading flash device list [/Applications/SEGGER/JLink_V760e/JFlash.app/Contents/MacOS/../../../ETC/JFlash/Flash.csv] ... - List of flash devices read successfully (451 Devices)Reading MCU device list ... - List of MCU devices read successfully (8886 Devices)Creating new project ... - New project created successfullyConnecting ... - Connecting via USB to probe/ programmer device 0 - Probe/ Programmer firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Dec 3 2021 15:41:28 - Device "NRF52840_XXAA" selected. - Target interface speed: 1000 kHz (Fixed) - VTarget = 3.300V - InitTarget() start - InitTarget() end - TotalIRLen = ?, IRPrint = 0x..000000000000000000000000 - InitTarget() start - InitTarget() end - TotalIRLen = ?, IRPrint = 0x..000000000000000000000000 - Executing init sequence ... - ERROR: Could not perform target reset - ERROR: Failed to connect.Could not perform custom init sequence.
Is the chip dead? How can I verify it?
Please go through the check points in this post, also make sure the USB cable can support data.
I have gone through the post and I've tried several USB cables. The ATMEL chip works, the problem is when it tries to connect to the nrf52840.
Try the last version of nRF-Command-Line-Tools or another PC.