I am working on a LPC4088 microcontroller and I am using this board which has UART3, UART4 and HDK UART0 pins available on the expansion connector. Could I use this kind of circuit to listen to my UART on my PC? What about USB pins D+, D-? Would it be hard to use those to communicate with my PC?
Listenning to my UART over "USB Host Interface" (upwards type A USB next to ethernet interface) on my board is probably the hard way to go?
I am just curious on how to achieve this as simple as possible, but I am bugged by the fact that I'll probably have to buy another circuit... Well I'll do it if this is the simplest way.
The circuit you're showing is usefull to get your 3V3 USB signal from the board and convert it to a 5V USB signal for your computer.
You can check for come board to connect the Rx/Tx pins of UARTs to your computer to communicate both ways with the board.
Btw, using USB pins could be a real pain if you don't have some library with easy functions to use. UART stuff is more accessible.