How will TRACE32 identify a coresight system in multichip mode?

Question

In a single chip system, TRACE32 could use SYStem.DETECT DAP to access the single root ROM table in DAP to idendify and discover the system. Then how in a multichip system?
For example, in a system of 2 chips, each of which has its own DAP and ROM table, and the two DAPs are connected in daisy chain. What will SYStem.DETECT DAP do? And how is the system identified?

Answer 1

Select the DAP within the JTAG daisy chain by setting up the correct pre- and post-bits with the four commands SYStem.CONFIG.DAIRPRE, SYStem.CONFIG.DAIRPOST, SYStem.CONFIG.DADRPRE and SYStem.CONFIG.DADRPOST.

To find the right values for the pre- and post-bits you can use the command SYStem.DETECT.SHOWChain. It opens a window which allows you to set the pre/post-bits directly from there via a context menu:

Afterwards SYStem.DETECT.DAP examines the DAP which is accessible with the previously defined pre/post-bits.