DAP to unlock via blhost or SEC?

[NXPMike]

lpc55s69

If I set CFPA/CMPA bits to require Debug Authentication Protocol (DAP) for ISP/SWD/JTAG and I want to update my code image via ISP over USB, can I do that using blhost or SEC?

[NXPMike]

Thanks for the reply. I was not aware of the nxpdebugmbox utility.

I am still a bit confused. Am I required (in my scenario) to attach a debug probe just to talk to the ISP bootloader via USB once I have enabled ISP DAP? Is there no way to authenticate directly with ISP? SEC/nxpdebugmbox seem to only provide for debug probe connections.

[marek-trmac · Accepted solution]

Hi Mike,

I do not know what configuration you have in CFPA/CMPA, so generally:

• debug authentication can be done only through debug probe
• ISP communication channels are USB, UART, SPI, I2C

[liborukropec]

Hello Mike,

a) if you are user of SEC tool, you can use directly SEC GUI to open the debug port - see PKI Management TAB, where you can generate Debug Key, Create a debug request, sign it and then Open the debug port. See User Guide (you can open it from Help menu) and see chapter 7.2 Debug authentication workflow for more details.

b) If you prefer command line, then for opening debug port can be done using nxpdebugmbox utility (also available as an directly executable application in c:\nxp\MCUX_Provi_v10\bin\_internal\tools\spsdk folder (windows, v10)

Please check also Application Note  https://www.nxp.com/docs/en/application-note/AN13037.pdf for more details.

Regards,

Libor