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  • USB PA5 random reset

    I am using the PA5 USB to serial converter with FTDI driver 2.12.0.0.
    Workshop4 just updated today to 4.2.0.15.

    What I experience now is the display is reset at various intervals, ranging from ~10s to maybe 1 minut. Very annoying when you are using Workshop4 and want to test the software.
    What I also discovered was that if I have the comm port open by a terminal program for example, the display is not reset. I have tested workshops4 terminal and FoxTerm. As long I stay connected the display is not reset. As soon I close the terminal program the reset cycles again in random intervals.
    I have never seen this behavior before.

    Any of you smart guys that can explain this? And maybe even have a solution?

    One solution could be to have a check box in Workshop4 where you on a project basis could select whether to keep the port open after download of your code or close the port.

    I assume the DTR signal is left 'dangling' when the port is closed, and in a random pattern toggles shortly causing the display to reset. The display reset signal goes low for about 1 ms or so.


    Thanks,
    Claus Knudsen.

  • #2
    Something on your computer is opening the com port and 'playing' with it.

    Have a look at this thread for some ideas about what it could be and how to, perhaps, identify the issue http://forum.4dsystems.com.au/forum/...g-and-flashing
    Mark

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    • #3
      Originally posted by ESPsupport View Post
      Something on your computer is opening the com port and 'playing' with it.
      Indeed!
      Thank you for pointing me in the right direction - and also thank you for a very speedy response from you ;-)

      Cause:
      I recently changed to another smartphone, Sony, and it was Sonys PC Companion software that polled all the ports that are not opened at irregular intervals.

      Solution:
      Stop that program from running when you are developing software for displays!

      Thanks,
      Claus

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