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How do I view the data from the virtual com port?

Thimira G
Prodigy 170 points
Other Parts Discussed in Thread: EK-TM4C1294XL

Hello,

Dev board: EK-TM4C1294XL

OS: Windows 8

I am trying to run the example program "uart_echo", which I believe just prints out the characters you type back onto the UART. However, I cannot get this to work.

I tried both putty and Bray's terminal with no success.

  1. All drivers are successfully installed
  2. COM4 is the Stellaris Virtual Serial Port, which I'm using
  3. Baud is set to 115200, Parity and Flow Control set to none

I know SOMETHING is happening, because when I press keystrokes while in the putty terminal, the LED on the dev board blinks. However, there is no output on my screen.

How do I get the output to be displayed?

  • 0
    Guru 86605 points

    Hi,

        What IDE are you using to run uart_echo?

        Do you see "Enter Text:", printed out at putty?

    - kel 

  • 0 in reply to Markel Robregado
    Prodigy 170 points

    Sorry, I'm using CCSv6.

    No, there is nothing displayed in putty. Even when I press key strokes, nothing is displayed (I only see the LED blink on the board)

  • 0 in reply to Thimira G
    Guru 86605 points

    Hi,

        I have tested the uart_echo using my EK-TM4C1294XL without problems. So, I know it is working.

        Try loading the uart_echo .bin file using LM Flash Programmer and see if you still get the same output at Putty. The binary file is located at "\ek-tm4c1294xl\uart_echo\ccs\Debug".

        Try also other serial console like Tera Term.

    - kel

  • 0 in reply to Markel Robregado
    Prodigy 170 points

    Hi,

    I installed the binary through LM Flash programmer and the result is the same. I also verified with Tera Term, and the problem still remains. Could you confirm you have only the following drivers installed (for this board) from the picture below, as well as your Operating System?

    Thanks

  • 0 in reply to Thimira G
    Guru 86605 points

    Hi,

       Post a top picture of your Tiva Connected Launchpad showing your jumper connections.

       Also, you can try at a different PC. See, if you get the same results.

    - kel

  • 0 in reply to Markel Robregado
    Prodigy 170 points

    I tried it on another PC (Windows 8.1) still the same result.

    Here is a picture of my board:

  • 0 in reply to Thimira G
    Guru 86605 points

    No problems with jumper placement.

    I am out of ideas. Just wait for a TI Engineer to reply at this post.

    But, have you made this launchpad work before and have tested example programs? 

    - kel

  • 0 in reply to Markel Robregado
    Prodigy 170 points

    Markel Robregado said:
    No problems with jumper placement.

    How odd, I changed PJ5 to be Horizontal i.e. in the "UART" position, and now it works. I can see ."Enter text: " and everything I type on putty

  • 0 in reply to Thimira G
    Guru 86605 points

    Thimira G said:
    How odd, I changed PJ5 to be Horizontal i.e. in the "UART" position, and now it works. I can see ."Enter text: " and everything I type on putty

    Click the "Verify Answer" at your reply.

    - kel

  • 0 in reply to Thimira G
    Guru 117855 points

    I'd award "half" a Verify to poster kel for directing you to check jumper connections.

    That said - your too bright Led makes your photo difficult/disagreeable to view.  (impacted your camera & viewer's pupils...)

    Photos should lessen the brightness of such "uneventful" objects - to enable best viewing of the (more critical) board features...  (i.e. jumper positions)