I read in the documentation there is a way to display the log window on the BDT like this:

but in fact I can't display the windows log on the BDT.

for hardware devices I use:
- TLSR8258 Development Board
- TLSRGSOCBK56B Telink Burning Board

the firmware I downloaded into the TLSR8258 Development Board is Debug_Demo from project B85_Driver_demo (http://wiki.telink-semi.cn/tools_and_sdk/Driver/telink_b85m_driver_sdk.zip)

is this due to an error in the BDT, hardware, or firmware ?
how can i solve this problem?