JTAG debug challenge/response in CodeWarrior connection server console (not GUI)

[frank_o]

Hi,

AN5227 describes how to configure secure debug key in CodeWarrior IDE ((Connection configuration, advanced TAP settings) but we would like to do the same inside CCS debug console (without the GUI, so we can eventually script it.

Using a CWTAP, is there a way to perform challenge/response within debug console instead of within CodeWarrior IDE ?

Regards,

Frank.

[yipingwang]

Which processor do you use? LS1021A?

Which version CodeWarrior do you use?

[frank_o]

Thank you for your reply,

We use ls1043a with CW 2020.06+patch armv8.11.5.2

Regards.

[yipingwang · Accepted solution]

Here is an excerpt for setting the response from ccs (a secure debug violation is caught if challenge / response mechanism is not used):

delete all

config cc cwtap

ccs::config_chain {ls1043a dap sap2}

Secure debug violation

user must first read the DCV value

#from ccs

display ccs::read_reg 0 sdcr 1 8

   sdcr=0x89ABCDEF 01234567

write the response value DRV

#from ccs

ccs::write_reg 0 sdrr 8 {0x22222222 0x11111111} ccs::config_chain {ls1043a dap sap2} display ::ccs::get_config_chain

[frank_o]

Great, I think this is exactly what I needed.  I cannot test it today, but as soon as it's confirmed to wok, I'll mark your answer as correct.

Thank you very much.