Checked. Libhidapi-libusb0 and libhidapi-hidraw0 were installed. Libhidapi-dev was not. ( I did develop some code which used libusb some time ago). Both CMSIS-DAP lines in ./configure show 'yes' (auto), that is the one with V2 and the other without.
On Sun, Feb 16, 2025, 23:52 Antonio Borneo <borneo.anto...@gmail.com> wrote: > I think the issue is due to OpenOCD being compiled without any HID API > library. > Do you have either "hidapi-hidraw" or "hidapi-libusb" installed? > > When there is no HID library, the OpenOCD command "cmsis-dap backend > hid" returns the error message > "invalid backend argument to cmsis-dap backend <backend>" > which, by the way, is not the ideal outcome! > > At the end of the configure, the build system dumps the table "OpenOCD > configuration summary" but it does not report anything explicitly > about HID! > Anyway, the line > CMSIS-DAP v2 Compliant Debugger yes (auto) > is for the "usb_bulk" backend, while the line > CMSIS-DAP Compliant Debugger yes (auto) > is for the "hid" backend. Check that this last line reports "yes" in your > build. > > I think we have some improvement to code here: > - report USB and HID in the configuration summary instead of v2 vs nothing > - eventually extend the summary to report the libraries found > - modify the command "cmsis-dap backend" to always recognize the > options "usb_bulk" and "hid" and report if the option is not > available. > > Antonio >
