Hello, I can finally reproduce the bug. It occurs when trying to flash the tock-bootloader on a microbit v2.
~~~ git clone https://github.com/tock/tock cd tock/boards/microbit_v2/ make flash-bootloader ... openocd -f openocd.cfg -c "program /tmp/tock-bootloader.microbit_v2.vv1.1.1.bin; verify_image /tmp/tock-bootloader.microbit_v2.vv1.1.1.bin; reset; shutdown;" Open On-Chip Debugger 0.11.0-rc2 Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html Error: flash bank name 'nrf52.flash' already exists Error: flash bank name 'nrf52.uicr' already exists -4 Info : Using CMSIS-DAPv2 interface with VID:PID=0x0d28:0x0204, serial=9904360258994e450062900c00000033000000009796990b Warn : could not claim interface: Resource busy Error: error writing data: Input/Output Error Error: CMSIS-DAP command CMD_INFO failed. Error: No Valid JTAG Interface Configured. make: *** [Makefile:37: flash-bootloader] Error 255 ~~~ When I posted my original message I didn't realize that the bug was this weird message `Error: flash bank name 'nrf52.flash' already exists Error: flash bank name 'nrf52.uicr' already exists -4`. What is even more suspicious is that on one laptop that I tested this, the bug went away after a reboot. (Lenvo Yoga running ArchLinux) On another laptop (ThinkPad running Fedora) it disappeared after two reboots :) As you have request of me last time, I was finally able to attach a some debugging information. I would also like to note that the same error appears when flashing the [tock-bootloader](https://github.com/tock/tock-bootloader), whether I use a pre-build version or not. Thank you for your patience, for I am beginner. Attachments: - [odd.txt](https://sourceforge.net/p/openocd/tickets/_discuss/thread/421e8071d5/6338/attachment/odd.txt) (9.1 kB; text/plain) --- ** [tickets:#356] fail to debug a micro:bit v2 application** **Status:** new **Milestone:** 0.11.0 **Created:** Wed Jul 13, 2022 01:04 PM UTC by Matei Barbu **Last Updated:** Wed Jul 20, 2022 02:39 PM UTC **Owner:** nobody Hello, Am i trying to flash&debug the [TockOS](https://github.com/tock/tock/) kenel using OpenOCD on a [micro:bitv2](https://github.com/tock/tock/tree/master/boards/microbit_v2) board, but ran into difficulties. ```bash $ openocd Open On-Chip Debugger 0.11.0-rc2 Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html Error: flash bank name 'nrf52.flash' already exists Error: flash bank name 'nrf52.uicr' already exists -4 Info : Listening on port 6666 for tcl connections Info : Listening on port 4444 for telnet connections Info : Using CMSIS-DAPv2 interface with VID:PID=0x0d28:0x0204, serial=9904360258994e450062900c00000033000000009796990b Info : CMSIS-DAP: SWD Supported Info : CMSIS-DAP: FW Version = 0255 Info : CMSIS-DAP: Serial# = 9904360258994e450062900c00000033000000009796990b Info : CMSIS-DAP: Interface Initialised (SWD) Info : SWCLK/TCK = 1 SWDIO/TMS = 1 TDI = 0 TDO = 0 nTRST = 0 nRESET = 1 Info : CMSIS-DAP: Interface ready Info : clock speed 1000 kHz Info : SWD DPIDR 0x2ba01477 Info : nrf52.cpu: hardware has 6 breakpoints, 4 watchpoints Info : starting gdb server for nrf52.cpu on 3333 Info : Listening on port 3333 for gdb connections Info : accepting 'gdb' connection on tcp/3333 Info : nRF52833-xxAA(build code: A0) 512kB Flash, 128kB RAM undefined debug reason 8 - target needs reset Polling target nrf52.cpu failed, trying to reexamine Info : SWD DPIDR 0x2ba01477 Info : nrf52.cpu: hardware has 6 breakpoints, 4 watchpoints Polling target nrf52.cpu failed, trying to reexamine Info : SWD DPIDR 0x2ba01477 Info : nrf52.cpu: hardware has 6 breakpoints, 4 watchpoints Error: nrf52.cpu -- clearing lockup after double fault Polling target nrf52.cpu failed, trying to reexamine Info : nrf52.cpu: hardware has 6 breakpoints, 4 watchpoints Info : dropped 'gdb' connection Info : accepting 'gdb' connection on tcp/3333``` I would ignore the error messages, but `gdb` fails to run correctly: ```Reading symbols from ../../target/thumbv7em-none-eabi/release/microbit_v2.elf... (gdb) target extended-remote localhost:3333 Remote debugging using localhost:3333 0x0001ad90 in ?? ()``` I am running Debian 5.10.127-1 (2022-06-30) x86_64 GNU/Linux natively, with ```$ gdb-multiarch -v GNU gdb (Debian 10.1-1.7) 10.1.90.20210103-git``` Am I doing something wrong? I would much appreciate your help! --- Sent from sourceforge.net because openocd-devel@lists.sourceforge.net is subscribed to https://sourceforge.net/p/openocd/tickets/ To unsubscribe from further messages, a project admin can change settings at https://sourceforge.net/p/openocd/admin/tickets/options. Or, if this is a mailing list, you can unsubscribe from the mailing list.
