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Hot Topic (More than 8 Replies) Not Downloading to Correct COM port (Read 6394 times)
tlb
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Not Downloading to Correct COM port
Nov 22nd, 2014 at 3:47am
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I am new to this software.  It was recommended to run multiple Teensy's.

I have two Teensy 3.1's hooked up, to two different COM ports, COM9 and COM10.  I am just running a version of Blinky at the moment.

When I select COM9 or COM10 in the GUI, it will say Uploading to I/O board using 'COM9', or Uploading to I/O board using 'COM10' depending on the GUI setting, but load only to COM9.  Sometimes it will load only to COM10 for a while.  If I press the button on Teensy, it will load to the correct port  for which the button was pressed. 

Any ideas?  I am running Windows XP.

Thanks.
  
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Tim@Visual Micro
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Re: Not Downloading to Correct COM port
Reply #1 - Nov 22nd, 2014 at 2:16pm
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Hi,

The design of some boards means that only one board can be plugged into the pc at any one time. I suspect that Teensy is the same.

Can you confirm if the problem happens when using the Teensy/Arduino ide thanks
  
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Re: Not Downloading to Correct COM port
Reply #2 - Dec 7th, 2014 at 6:18pm
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I am using the Teensy3.1/ Arduino IDE.  I try to switch between downloading to the two COM ports and it doesn't switch.   

I have the two Teensy's hooked into two separate USB ports.  Since I posted, running standalone, without the IDE, I am able to download the individual .hex files to the two separate boards.  However, I was hoping to be able to switch automatically using the IDE.

Thanks,

TLB
  
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Re: Not Downloading to Correct COM port
Reply #3 - Dec 7th, 2014 at 6:21pm
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I just wanted to clarify on the previous post that I download the files on the 2nd Teensy by pressing the button on the Teensy board.   

Standalone, from my makefile I can download automatically to one port.  And then to download to the second port, I have to press the button on Teensy.
  
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Re: Not Downloading to Correct COM port
Reply #4 - Dec 7th, 2014 at 7:33pm
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Hello,

Can you switch port and upload without pressing reset if you use the Teensy Ide and do not use Visual Micro?

Thanks
  
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Re: Not Downloading to Correct COM port
Reply #5 - Dec 9th, 2014 at 12:12am
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When using the Teensy with no IDE, only a makefile and the downloader, it automatically downloads only to the lower number port.  To download to the higher number port I have to press the button.

  
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Re: Not Downloading to Correct COM port
Reply #6 - Dec 9th, 2014 at 12:17am
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Can you switch port and upload without pressing reset if you use the Arduino/Teensy Ide?
  
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Re: Not Downloading to Correct COM port
Reply #7 - Dec 9th, 2014 at 12:24am
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I have not tried the Arduino/Teensy IDE because I started with one Teensy not using the Arduino framework.  Then I started looking at other solutions when I needed to program two Teensy's.  The feedback I got from the Teensy forum suggested the Visual Micro solution and said the Arduino solution was somewhat cumbersome for switching between Teensy's.
  
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Re: Not Downloading to Correct COM port
Reply #8 - Dec 9th, 2014 at 1:03pm
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Hi,

You need to ask Paul at pjrc.com if the Teensy boards support what you want to do.

Visual Micro does not do the upload for teensy, instead is runs teensy uploader.exe files that are installed with the teensy ide. Obviously this happens in background so you do not see it happening.

I know that some "clever" boards use a usb connection even though you select the COM port. This often means they can only cater for one board at a time.

Don't bother with anyone else in the forum at Teensy because they won't know how it works. Just ask Paul.

Thanks
  
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