From: "Adam" <adam@no_thanks.com>
"John Nagle" <na...@animats.com> wrote in message
news:jse604$1cq$1...@dont-email.me...
On 6/26/2012 9:12 PM, Adam wrote:
Host OS: Ubuntu 10.04 LTS
Guest OS: Windows XP Pro SP3
I am able to open port COM4 with Terminal emulator.
So, what can cause PySerial to generate the following error ...
C:\Wattcher>python wattcher.py
Traceback (most recent call last):
File "wattcher.py", line 56, in <module>
ser.open()
File "C:\Python25\Lib\site-packages\serial\serialwin32.py", line 56,
in
open
raise SerialException("could not open port %s: %s" % (self.portstr,
ctypes.WinError()))
serial.serialutil.SerialException: could not open port COM4: [Error 5]
Access is denied.
Are you trying to access serial ports from a virtual machine?
Which virtual machine environment? Xen? VMware? QEmu? VirtualBox?
I wouldn't expect that to work in most of those.
What is "COM4", anyway? Few machines today actually have four
serial ports. Is some device emulating a serial port?
John Nagle
Thanks, and yes, I am using VirtualBox. My laptop does not have a serial
port so
I use a USB-to-serial converter, which is assigned COM4.
Then it is a Virtual COM port. Often software will want to communicate
directly to the COM4 port which is usually at: IRQ3 and I/O 2E8h.
--
Dave
Multi-AV Scanning Tool - http://multi-av.thespykiller.co.uk
http://www.pctipp.ch/downloads/dl/35905.asp
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