Hi @a_ki :
whenever a flashing of FW (the K82 FW or the PN5190 FW) is being interrupted, then of course afterwards there is no valid FW flashed, and the board does not work anymore.
The recovery is fairly simply though.
Use MCUXpresso (MCUXpresso Integrated Development Environment (IDE)) and import the package of PN5190 Secure Firmware Downloader (https://www.nxp.com/webapp/sps/download/license.jsp?colCode=SW6592).
The detailed steps of installing and importing can be found here: PNEV5190B evaluation board quick start guide
There is no extra linker being required, since our board supports the OpenSDA (using the second available USB connector).
With this example, a valid PN5190 FW can be flashed.
When done, flash the K82 FW for the NFC Cockpit, e.g. the BootLoader_And_Nfcrdlib_SimplifiedAPI_EMVCo_Secondary_FSDI_8.bin from
c:\nxp\NxpNfcCockpit_v6.5.x.x\firmware\Secondary_PN5190\K8x\
Afterwards, everything must be running again with NFC Cockpit.
Regards
Daniel