Hi Peter, I use an ST-LINK V2, which costs $3-$12 depending where you buy online.
Loading and debugging works with the stock nrf52.cfg and stlink-v2.cfg files provided by OpenOCD 0.10.0. Though ST-LINK is not a FOSS hw design, it is cheap and doesn't require proprietary drivers. Regards, Chris On Thu, May 25, 2017 at 3:05 PM, Wayne Keenan <wayne.kee...@gmail.com> wrote: > Hi Peter, > > I've used OpenOCD on a Pi with just jumper wires to program an nRF51, for > reference: > > https://chisight.wordpress.com/2016/03/22/openocd-for- > programming-nrf51822-via-nothing-but-wires-and-a-raspberry-pi/ > > https://learn.adafruit.com/programming-microcontrollers- > using-openocd-on-raspberry-pi/wiring-and-test > > > > Just as a FYI: I was doing the above and also using avrdude + jumper wires > for AVR's at the same time and although I don't recall having many/any > issues using OpenOCD I was having to manually 'free' the Pi's GPIO pins > occasionally using something like: > > echo 4 22 23 18 | xargs -n 1 gpio unexport > > If you run into troubles then maybe try that (check the pins match your > OpenOCD config) > > > Regards > Wayne > > On 25 May 2017 at 19:39, Peter Jones <mlists+myn...@devalot.com> wrote: > > > Is it possible to use newt to flash a nRF52 without having to use > > J-Link? > > > > The getting started guide seems to imply that OpenOCD version 0.10.0 is > > an option but I can't seem to figure out how to make `newt load' use > > it. I tried setting `OPENOCD_DEBUG=1' without luck: > > > > $ newt target set nrf52_blinky syscfg=OPENOCD_DEBUG=1 > > $ newt load --verbose nrf52_boot > > > > ...still tries to use J-Link. > > > > I want to avoid using J-Link because: > > > > 1) Pragmatic reason: I'm having a hard time getting J-Link to work on > > my OS (NixOS) > > > > 2) Philosophical reason: I'm building a completely open product and > > would like to have the entire tool chain open as well. I'm a firm > > supporter of Open Source and relying on proprietary software like > > J-Link makes me uncomfortable. > > > > Thanks. > > > > -- > > Peter Jones, Founder, Devalot.com > > Defending the honor of good code > > >
