how to trace the example printf

[wziy520]

very basic question,

why example 01_hello_world just look printf("Hello world!\n");, and the print "Hello world" will output from the serial port?

where init(or define) the UART and link the printf output to UART?

wziy

[WiFive]

https://github.com/espressif/esp-idf/bl ... art.c#L180