So you would suggest, that I use the Virtual COM Port Driver
(http://www.ftdichip.com/Drivers/VCP.htm) instead of the D2XX Direct
Driver (http://www.ftdichip.com/Drivers/D2XX.htm) I'm currently using?
Does this matter at all?
Problem is I'm a novice when it comes to setting up a usb or serial
connection..
So please be patient with me, when I may ask stupid questions.
Thanks
David
Am 27.07.11 22:17, schrieb Ian Daniher:
If you're using a RS232-USB adapter, PyUSB may not work, as the other
driver is likely blocking.
Additionally, the "pyserial" library may be of more use, sparing you a
layer of abstraction.
On Wed, Jul 27, 2011 at 15:58, David Brunnthaler <[email protected]
<mailto:[email protected]>> wrote:
Thanks for your replies.
First of all: I'm using the official drivers from that RS232 <->
USB adapter (http://www.ftdichip.com/Drivers/D2XX.htm)
I monitored the USB transfer with wireshark and you can see part
of the compressed output here:
http://pastebin.com/4jf79vGQ
And if you want you can also have a look at the full file:
http://dl.i-am-alive.at/wireshark_full.txt
Correct me if I'm wrong:
What that tells me is that my endpoint adress is either 0x82 or 0x01.
The length is most of the time 64. So is assume that this is my
"nrByteRead"
Can someone look at the logs and tell me if I'm right or wrong? I
think I may still use the wrong "bConfigurationValue"..
Thanks in advance
David
Am 27.07.11 16:20, schrieb Ian Daniher:
Have you monitored a USB transfer with the scale using its
original driver? I suggest the 'usbmon' kernel module. Use Wine
or a VM if it's a windows-only app.
On Wed, Jul 27, 2011 at 08:10, David Brunnthaler
<[email protected] <mailto:[email protected]>> wrote:
Hello,
I'mright now trying to get pyUSB to read from my usb-scale
but i'm running into some issues there.
My python code: http://paste.pound-python.org/show/10095/
and my output: http://paste.pound-python.org/show/10096/
As you can see, it just stops at line 49 of the code.
In the Tutorial
(http://pyusb.sourceforge.net/docs/1.0/tutorial.html#how-am-i-supposed-to-work)
it says you first have to issue a "set_configuration" request.
I tried all three different methods (line 31, line 33 and
lines 35 to 37) but it always tells me:
http://paste.pound-python.org/show/10097/
Any idea what I'm doing wrong, or how I can establish a
successful connection?
Thanks in advance
David
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