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makerdiary / nrf52840-mdk

An Open-Source, Micro Development Kit for IoT Applications using the nRF52840 SoC
https://wiki.makerdiary.com/nrf52840-mdk/
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DAPLINK programming and board disconnecting issues #12

Closed lukaszmargielewski closed 5 years ago

lukaszmargielewski commented 5 years ago

I m using Mac OS and pyocd tool to program mdk board. I have following issues since the beginging:

  1. Board keeps disconnecting with message: "Disk Not Ejected Properly Eject DAPLINK before disconnecting or turning off"

  2. Programming board works only for 2 or so times and then keeps failing more and more until I restart Mac for it to work for a while again.

I am using following programming command: pyocd-flashtool -t nrf52 -ce binay.hex

What I tried (with no success):

To be honest I am not sure what is the source of the problem (hardware / software / Mac OS). I am also not sure if it is the correct place but I couldn't find solution myself nor better place to ask for help.

caizelin commented 5 years ago

I m using Mac OS and pyocd tool to program mdk board. I have following issues since the beginging:

  1. Board keeps disconnecting with message: "Disk Not Ejected Properly Eject DAPLINK before disconnecting or turning off"
  2. Programming board works only for few times and then keeps failing more and more until I restart Mac for it to work for a while again. I am using following programming command: pyocd-flashtool -t nrf52 -ce binay.hex I am also using screen command to listen to logs from the board: screen /dev/tty.usbmodem141102 115200

Upgrading firmware to the most recent version did not help.

To be honest I am not sure what is the source of the problem (hardware / software / Mac OS) and if it is the correct place but I couldn't find solution myself nor better place to ask for help.

Could you have a try on another host PC to check if it is caused by the host?

stefanosky commented 5 years ago

hi same situation to me, in a new mac os. maybe the current of the circuits leds? it's too much for mac book pro?

stefanosky commented 5 years ago

still there the problem of disconnected and connected device on mac book pro 2018 with original adapter usb c -> usb

caizelin commented 5 years ago

@lukaszmargielewski brew install libusb should be implemented. Also see #14

stefanosky commented 5 years ago

whoaw what a mess, with the official apple usb adapter didn't works, but with a chinese adapter for android phone usbc -> usb works, the connection is stable, and resolve this issue of disconnected continuosly

caizelin commented 5 years ago

whoaw what a mess, with the official apple usb adapter didn't works, but with a chinese adapter for android phone usbc -> usb works, the connection is stable, and resolve this issue of disconnected continuosly

You can also connect the board without an adapter, if you have a USB-C to USB-C cable. I have tested that it works on a new MBP with USB-C interface.

lukaszmargielewski commented 5 years ago

@caizelin : Sorry for late response - it took me a while to find other Mac and install all tools. Similar things there. I ended up uninstalling pyocd and using DAPLINK only (just cp into /Volumes/DAPLINK). I still get disconnecting popup but things are working much better now: I am successfully programming device all the time now without my Mac hanging.

caizelin commented 5 years ago

Pls reopen this issue if you have any concerns. Thanks!