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  VS Arduino › Visual Micro › Installation & Troubleshooting › Can't upload program to Sparkfun Pro Micro 3.3V
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Normal Topic Can't upload program to Sparkfun Pro Micro 3.3V (Read 2472 times)
BioEngr
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Can't upload program to Sparkfun Pro Micro 3.3V
Mar 15th, 2018 at 2:50am
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When I attempt to upload my program in VisualMicro in VisualStudio Community V14.0 with "Start without debugging" I get this error message:
Uploading 'BluetoothMaster' to 'SparkFun Pro Micro w/ ATmega32U4 (3.3V, 8 MHz)' using 'COM25'
Unable to 'touch' hardware serial port: COM25. Now assuming selected port is bootloader port. This might still fail, have you got the correct board selected?
The uploader returned an error
avrdude: ser_open(): can't open device "\\.\COM25": Access is denied.

However, when I copy the program into the Arduino IDE, it uploads and runs fine.  Since it's using the same COM device driver, board configuration, etc, I assume the bug is in Visual Micro.

Any ideas? workarounds?
  
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Tim@Visual Micro
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Re: Can't upload program to Sparkfun Pro Micro 3.3V
Reply #1 - Mar 16th, 2018 at 12:23pm
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Might be usb driver related. Arduino uses java and visual micro uses C# which sometimes shows some differences but not often.

The arduino ide has file>preferences>upload verbose and visual micro has vmicro>compiler>Verbose

We can compare the outputs of these two after upload attempt to see if there is a difference.

You can copy and paste the output into .txt files so we can compare them.

With usb issues it is also useful to state the driver name, version and date from device manager



  
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Re: Can't upload program to Sparkfun Pro Micro 3.3V
Reply #2 - Mar 16th, 2018 at 1:40pm
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I'll run the tests you suggest and provide the additional information about the drivers, etc.
  
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