Now, anything you type in the screen program will be transmitted by
the USB/UART adaptor. In the logic program, “start” a capture – you should
see a window that says “waiting for a trigger”. Then, in the screen window
type the alphabet as quickly as you can. Once the capture is complete, zoom
in and examine the captured data – you should see the characters you typed.
If the data is marked with framing errors, then it is likely that the USB/UART
is transmitting at a baud rate that is different than the Saleae Logic expects.
Correct this (either by reconfiguring Logic, or the USB/UART) before proceeding.
To exit from screen type C-a k (“control a k’́).