Hi - this is similar to this…
…but I didn’t want to bump it after all this time, so tagging @nrobinson2000 in case he has any insights.
Basically, I have what I think is a bricked Xenon - no LED, no serial, can’t put it into any mode with the buttons. I have probed round the board with a multimeter and all the voltages seem ok.
So I thought I would try to re-flash the bootloader incase it was corrupt?
First I installed openocd from homebrew and ran the following command:
openocd -f interface/cmsis-dap.cfg -f target/nrf52.cfg -c "init; program /Users/mhazley/Downloadsemail@example.com 0xf4000 verify reset exit"
This resulted in the following error (same as @nrobinson2000 in linked thread)
Open On-Chip Debugger 0.10.0 Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html Info : auto-selecting first available session transport "swd". To override use 'transport select <transport>'. adapter speed: 10000 kHz cortex_m reset_config sysresetreq Info : CMSIS-DAP: SWD Supported Info : CMSIS-DAP: Interface Initialised (SWD) Info : CMSIS-DAP: FW Version = 1.10 Info : SWCLK/TCK = 1 SWDIO/TMS = 1 TDI = 0 TDO = 0 nTRST = 0 nRESET = 1 Info : CMSIS-DAP: Interface ready Info : reduce speed request: 10000kHz to 5000kHz maximum Info : clock speed 10000 kHz Info : SWD DPIDR 0x2ba01477 Info : nrf52.cpu: hardware has 6 breakpoints, 4 watchpoints target halted due to debug-request, current mode: Thread xPSR: 0x01000000 pc: 0x00000998 msp: 0x20000400 ** Programming Started ** ** Programming Failed ** shutdown command invoked embedded:startup.tcl:512: Error: in procedure 'flash' called at file "embedded:startup.tcl", line 512
So, as the guys did in the linked thread, I built openocd from source - I tired master and the version at the commit used in the linked thread, in both cases I get the same error:
Open On-Chip Debugger 0.10.0+dev-00620-g02279e2f (2019-11-27-09:21) Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html Info : auto-selecting first available session transport "swd". To override use 'transport select <transport>'. embedded:startup.tcl:21: Error: target requires -dap parameter instead of -chain-position! in procedure 'script' at file "embedded:startup.tcl", line 60 in procedure 'target' called at file "target/nrf52.cfg", line 22 in procedure 'ocd_bouncer' at file "embedded:startup.tcl", line 21
So, I did some digging around on that and found a web-page noting that this was something to do with the way the scripts have been changed in openocd - I started going down into the
.cfg files but I honestly got a bit lost (not familiar with openocd that much).
Anyone come across this issue? Or know a way around it…?