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not able to read UART port using putty

manojroy123

the usb to JTAG/UART pod is not able to read UART port using puTTY terminal. Not able to figure out what is going on.

image

can anyone help me in solving this problem. the board I am using is Ultra96-v2

  • It is very strange though that a USB device appears to you as COM3 or COM4. Can you put two screenshots of the Ports (COM & LPT) section of your Device Manager with the device connected by USB and with the device disconnected?
    Also set the speed to 115000 bauds instead of 9600 bauds

  • in reply to javagoza

    when device connected

    image

    when device disconnected

    image

  • Please make sure your baud rate is set correctly, also worth setting the flow control to None.

    image

  • in reply to manojroy123

    With the usb plugged try to uninstall the device,

    image

    Then, once uninstalled plug the USB cable in another USB port

    I think you don't need to install any drivers for the FTDI USB-to-UART bridge

  • in reply to javagoza

    only get one data bit as shown in image bellowimage

  • in reply to manojroy123

    Press reset on the board and if you still see strange characters review PuTTY Configuration for com4 as suggested 

  • in reply to javagoza

    If you are testing with putty and the JTAG selected your are not going to see anything until you program the board I think

  • in reply to javagoza

    please check the bellow video. In it, they have shown that you can access UART in JTAG boot mode via puTTY terminal. The SD card already has linux install in it.

  • in reply to manojroy123

    Yes, what I say is if you haven´t programmed anything that sends data through the uart you  are no going to see anything