AnsweredAssumed Answered

vrf Can the M series of libraries communicate with a generic USB device?

Question asked by hansolofalcon on Jul 1, 2004
Hello (again) from Gregg C Levine
You do make a good point.
However, when I wrote that, I happened to be working from a box at my
customer's offices, and the only account I had access to, that was
subscribed to the list, was one that I knew would go through my ISP's
web mail interface. And that's why it looks strange.

That being stated, I agree. During the first half of this year I
looked at having VEE talk to an application running either on a
microcontroller directly, and via the serial port, or via the USB
connection. Never got anywhere because the customer that asked about
it, gave up.

Now we are at it again. When I posted the original message, I wanted
to keep the wording down because I wasn't too sure about how well my
request would go over. I now know that I didn't need bother to do so.
And essentially the device once plugged into my breadboard here, would
be attached to a processor, we haven't chosen it as of yet. And
incidentally the two US dealers for the DLP designed modules are
quoting prices of $25 American.
-------------------
Gregg C Levine hansolofalcon@worldnet.att.net
------------------------------------------------------------
"The Force will be with you...Always." Obi-Wan Kenobi
"Use the Force, Luke." Obi-Wan Kenobi

> -----Original Message-----
> From: Kevin Valentine [mailto:kevin@physchem.ox.ac.uk]
> Sent: Friday, July 02, 2004 3:18 AM
> To: VRF
> Subject: [vrf] Re: Can the M series of libraries communicate with a
generic USB
> device?
>
> The FTDI devices are not 'generic' USB devices but are in practise
USB to
> serial/parallel.  You can communicate with the FTDI series devices
is 1 of 2
> ways depending on what driver you use.  FTDI produce 2 drivers a
normal DLL
> driver and a virtual COM port driver (VCP).  Both these drivers are
easy to
> use under VEE.  The normal DLL drivers work like any other DLL
driver.  The
> VCP driver will appear as an extra COM port on your computer and VEE
will
> recognise it as a normal COM port.  The only difference is that you
cannot
> set the baud rate as it is not applicable.  Both these drivers work
for the
> serial or parallel FTDI chips.  One word of warning, the FTDI chip
needs a
> microprocessor or microcontroller attached for the computer to
recognise it.
>
> As well as chips you can buy modules with a FTDI chip and a USB
socket on
> them.  They cost about 25 and are made by DLP design.  Information
on them
> can be found on the FTDI site.  http://www.ftdichip.com/FTModule.htm
They
> also make one with a PIC already on but I have never tried these
>
> Hope this helps
>
> Kevin Valentine
> kevin@physchem.ox.ac.uk
>
>
> ----- Original Message -----
> From: <landocalrissian@att.net>
> To: "VRF" <vrf@agilent.com>
> Sent: Thursday, July 01, 2004 4:23 PM
> Subject: [vrf] Can the M series of libraries communicate with a
generic USB
> device?
>
>
> > Hello from Gregg C Levine
> > (Pardon the format! I am at a customer so I am away from my normal
> accounts!
> >
> > Can the current series of libraries communicate with a generic USB
device?
> > Not the USB to HPIB device, or any of the instruments, but one of
those
> FTDI devices, such as "DLP Design has PC boards with a PIC and
FTDI's USB
> chip." (Quoted from the USB pages at www.lvr.com )
> >
> > I remember an ealier discussion which revolved around a family of
BASIC
> enabled devices, and I was urged to use the gizmos from FTDI, as
opposed to
> a serial solution using the RS232 standard.
> >
> > My ultimate goal is to have VEE talking to breadboarded hardware
via USB
> either 1.1 or 2.0, via those parts.
> > Gregg C Levine landocalrissian@att.net
> >
> > ---
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