Hello-
I recently got a custom board made with a nrf9160 module and am having trouble programming it. This project was reviewed by your team (private case ID: 321889) and other members of our team (in another office) have been successful flashing their boards so I'm inclined to think it's an issue with my setup. Can you please help suss out what could be wrong and/or come up with other tests for me to try? I feel like I must be missing something simple.
I have a Jlink Base with an Olimex interface board which connects the Jlink to a 10-pin header on the custom board. I've installed the Jlink software package and nRF connect for desktop on my windows computer. When I open the 'Programmer' and try to connect to the Jlink, I can see it but when I try to connect to the device I get the following text output:
I have done the following to try and find issues after reading various posts on similar issues:
- Checked that there is continuity from each of the pins on the Olimex to the custom board for VTref, SWDIO, SWDCLK, SWO, and nRESET
- Verified with a scope that there is data flowing on the SWDIO and SWDCLK lines
- Verified that the RESET line is at 2.2V and that it is briefly pulled low when a connection is attempted from the windows machine
- Verified that the custom board consumes ~1.7mA of current from the 10V power supply (17mW including voltage regulation, peripherals, etc...)
- Tried connecting with a different computer, same result
Other details:
- The system runs on 3.3V
- The custom board design was uploaded to Case 321889 (I do not want it to be published publicly). But here are the connections associated with the programmer:
Thank you so much!
Dave Y