Author Topic: com port disconnects  (Read 3559 times)

fixstuff

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com port disconnects
« on: December 08, 2013, 10:00:41 am »
Hi, first post here.

I've seen this mentioned a couple times by others having same issue, and would like clarification if possible.

When I download a project to the board, it will reset the CPU at the end of the download.  I'm ok with this.

What happens next, seems like an issue to me.  It will disconnect the board, and when it re-connects, most of the time, it will have a different COM port.  This is an annoyance mainly, but is there a way to keep it from re-assigning the port to a different COM?

Not sure if its a windows 7 issue or what.  When I do this with other arduino board's, say my Mega 2560, it doenst do that.  No disconnect, and no hassle with COM port changing.

Is this something to be addressed in a future update or firmware release?

EDIT:  I've been programming with it all morning, and it only did this the first time.  Every other download cycle has been fine, with no com port disconnects and remaps..
« Last Edit: December 08, 2013, 11:16:54 am by fixstuff »

digistump

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Re: com port disconnects
« Reply #1 on: December 08, 2013, 12:50:28 pm »
When the board first connects or any time after you hit the manual erase button it uses the atmel USB ID - after an upload it switches to the Digistump USB ID which causes most versions of windows to give it a new com port number.

defragster

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Re: com port disconnects
« Reply #2 on: December 20, 2013, 12:34:59 am »
This explains what I saw and made puzzled note of in another post - the port change after upload.  RTfM is on my list, honest - but is there a sticky thread that might combine USB details and other common startup issues to date?  Maybe the wiki - but I haven't seen that after 'Installing the DigiX/Arduino Software'

I've uploaded okay a couple times - even plugged on 8 LED's running a counter - 1ms wait seems to go pretty far.  I dropped the wait and the programmer cannot interupt so it took not just a few resets - but an erase to let me get back in.  If I hadn't learned that trick from my com errors - I'd have been forced to read more already.

defragster

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Re: com port disconnects
« Reply #3 on: December 20, 2013, 02:24:00 am »
IDE showed no ports after it had worked a couple times.  I did erase/reset and was on my way.

A pattern seems to be the PORT goes missing from Tools and there is none to select.

Later I saw the system USB failed msgBox - then had to clip the 'clock' usb failed about 6 times.