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No UART in terminal

Other Parts Discussed in Thread: EK-TM4C123GXL

Hopefully a simple question:  I'm running the uart_echo example program in CCS (6.1.2.00015) on a EK-TM4C123GXL evaluation kit. On a windows 10 machine.  The program builds and runs fine.  However, I can't seem to figure out how I'm supposed to view the uart output and input new text to send to the program.

I'm trying to use the terminal window within CSS.  I make a serial connection on the appropriate com port (COM3 in my case is the stellaris virtual com port) with baud rate 115200, Data bits 8, stop bits 1, parity none, flow control none and timeout 5 secs.  I've tried encoding with UTF-8, Iso-8859-1 and Cp1252,  I see the connection at the top of the terminal window and it says that it is connected.

However, no text is displayed and it does not allow me to enter input.  The black cursor just sits there blinking when the terminal view is selected.

I can step through the program, so I believe that the programming and my debugger are all working correctly.  Any idea what might be wrong? Am I missing something simple?

  • Unfortunately, this is a known issue with Tiva/Stellaris Launchpads and CCS Terminal view, especially at higher baud rates. Please see this related thread.

    You may try lowering the baud rate to 9600 to see if that helps, or try using a different terminal program such as Putty or Hyperterm.