SWD connection with TC2050-IDC-NL 10-Pin No-Legs Cable

[kc9999]

This is our first time using TC2050 for the smaller footprint in our prototype. But we can't establish a connection with JTAG in nRG Programmer. 

Below is the log from the attempted connection:

19:08:22.150	Selecting device with the serial number 000069661042
19:08:23.217	Error: Failed with exit code 1. Failed to device info one or more devices: * 69661042: [Probe] Device error: Failed to write DebugPort register 2: Unknown Error in J-Link DLL (error code =-1), code: Generic. Message: Operation device-info failed, [Probe] Device error: Failed to write DebugPort register 2: Unknown Error in J-Link DLL (error code =-1).
19:08:23.218	Selected device with the serial number 000069661042
19:08:23.218	Using nrfutil device to communicate with target via JLink
19:08:24.123	Reading readback protection status for Application core
19:08:24.123	Failed "reading readback protection status for application core". Error: code: 1, description: Generic, message: Batch task protection-get failed, [Probe] Device error: Failed to write DebugPort register 2: Unknown Error in J-Link DLL (error code =-1)
19:08:24.352	Error: Failed with exit code 1. One or more batch tasks failed: - [Probe] Device error: Failed to write DebugPort register 2: Unknown Error in J-Link DLL (error code =-1), code: Generic. Message: Batch task protection-get failed, [Probe] Device error: Failed to write DebugPort register 2: Unknown Error in J-Link DLL (error code =-1).
19:08:24.352	Error: Failed with exit code 1. One or more batch tasks failed: - [Probe] Device error: Failed to write DebugPort register 2: Unknown Error in J-Link DLL (error code =-1), code: Generic. Message: Batch task protection-get failed, [Probe] Device error: Failed to write DebugPort register 2: Unknown Error in J-Link DLL (error code =-1).

This is my current setup:

One thing that could improve is the length of the wires.

What might be the possible issues of my setup not working out?

Thank you,
Kevin

[Kazi Afroza Sultana]

Hello Kevin,

The error you are seeing seems related to the connection error or voltage mismatch between the debugger and the target board. Maybe the wire is connected wrong way. I agree with Fischer's comment.

You need to check if the target device is powered and that VTref is present at the debugger. To identify the correct voltage, you can use Jlink commander tools. For example, it will show the VTref volatge in follwing way. 

If the target is not powered or VTref is missing, you will get this error —Failed to write DebugPort register 2: Unknown Error in J-Link DLL (error code =-1).

Can look at this case (22) Flashing nRF52840 SOC in nRF52840 DK using External J-link, without using interface MCU (so, using nRF only mode) - Nordic Q&A - Nordic DevZone - Nordic DevZone

You can try to use a different PC or reinstall the jlink driver.

[kc9999]

Hi Kazi,

I’ve double-checked all the wiring, and everything should be correctly wired. This project is meant to downsize our previous prototype, which is why we’re using the TC2050, and we’ve never encountered this kind of issue before.

The log from Jlink commander:

and our schematics:

Thank you,

Kevin

[Turbo J]

You can try a very slow SWD clock, 500 kHz sometimes works better with bad cabling.

I spot 2 big issues: Reset pin must be accessible from the debug port (or at least from a test point), and the debug interface must have access to the actual target voltage (VDD) from the nordic chip.

If you supplied 5V to the debug pins, you might have grilled the MCU. The pins do not tolerate 5V levels.

Edit: It would also surprise me if your antenna setup worked for more than 5-10m range. We are missing an important layer but that HF signal does not look properly routed to me. Won't affect the debug connection yet and I don't design 2.4 GHz PCBs - we use 3rd party modules here.

[kc9999]

Transferred the ticket a to private ticket: Case ID: 350478 for all the schematic design