I am a research specialist at Arizona State University, and I have recently purchased a DA14585 Development Kit - Pro.
I am building an adapter/converter board based on the Development Kit - Basic design, which will program an application board using a DA14585. My end goal is to connect my computer to my adapter/converter board and to connect my adapter/converter board to my application board (which utilizes a DA14585). The adapter/converter board will be able to aid in debugging and load the OTP program into the DA14585. In the Basic design, I observe that the SAM3U2C was programmed using a TagConnect connection. I am using this same chip in my adapter/converter board.
I would like to ask, is the firmware for the SAM3U2C available? And if so, how shall I go about programming it? In this post, I read about someone using a J-Link programmer to achieve this. My knowledge of programming microcontrollers is relatively narrow, so I would be very grateful for any guidance you can provide.