debugging log how to show

[cheng5230]

1. I am using xcore_ai-explorer-board-v2_0
2. using xcore_iot -> examples-> freertos -> getting_started
3. example is successfully compiled，Use the following command to download
   
   How can I see debug logs of the system startup below
   
   Can XTAG-4 's DEBUG-N output logs ?
   
   Thanks.