rigado BMD-300 with nRF52 DK

[Vishnu Pradeep]

HI, Can anybody give me the connections to a BMD-300 with nRF52DK and the steps to program a BMD-300 from scratch? Which document provides the information, if there is any?

thanks, Vishnu

[Wojtek]

I once tried using P20 as debug output, but I failed and never came back to trying again. I am using p19 with no problems. just connect GND,SWDIO and SWCLK from P19, power the BMD board and you are all set.

[Vishnu Pradeep]

Is it? I don't have a cable to connect to P19. That is why I go with P20. I'll give a try with P19.

thanks

[Wojtek]

I tested that with my custom board, not the BMD, but i think that should be the same. I also dont have special cable, I just soldered 3 wires to the (GND, SWDIO, SWCLK) pads of the header. And remember about powering board you are willing to program.

[Vishnu Pradeep]

Thanks, Only 3 wires are required? how does the programmer detects the external chip then? Will it be able to detect using the GND? I didn't find the pinout of P19. can you please share the pinout details of P19 header, if you dont't mind? For powering up the BMD-300 module, Can I use the VDD and GND from nRF Dev board?

[Wojtek]

Yes, i am using only 3 wires and it works ok. I don't know how exactly it detects, but when i power up external board and it is connected as I said, it is programmed by DK. if it is not powered - internal MCU of DK is being programmed. So detection works ok. P19 pinout is standard 10-pin SWD connector - just note where pin 1is! You can find schematics on nordic website

I don't know about powering. I am powering my board from power supply. probably depends of current consumption