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PICList Thread
'[EE]:USB'
2003\08\29@041030 by Luis Moreira

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Hi Guys
can anyone point me in the right direction... I need to build a board with
USB conectivity but do not know much about it, need info badly.
regards
               Luis

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2003\08\29@043148 by Samo Benedicic

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Hi!

I used FTDI chip FT8U232AM and it worked fine. All the
drivers and info is here: http://www.ftdichip.com/

This chip converts RS232 to USB and back.

Regards, Samo

--- Luis Moreira <.....Luis.MoreiraKILLspamspam@spam@JET.EFDA.ORG> wrote:
{Quote hidden}

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2003\08\29@053745 by Alan B. Pearce

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>I used FTDI chip FT8U232AM and it worked fine. All the
>drivers and info is here: http://www.ftdichip.com/
>
>This chip converts RS232 to USB and back.

Do not forget they also have a version that is a parallel interface, and in
some circumstances may be a better chip to use. Certainly the FTDI chips are
ideal ways to get started with USB.

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2003\08\29@053954 by Luis Moreira

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Hi Samo
this is great, it's exactly what I needed but by any chance do you know how
to interface it with VB.net
thanks
       Luis

{Original Message removed}

2003\08\29@054200 by Luis Moreira

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Hi Alan
what is the part number for that parallel interface chip?
thanks
       Luis

-----Original Message-----
From: Alan B. Pearce [A.B.Pearcespamspam_OUTRL.AC.UK]
Sent: 29 August 2003 10:37
To: @spam@PICLISTKILLspamspamMITVMA.MIT.EDU
Subject: Re: [EE]:USB


>I used FTDI chip FT8U232AM and it worked fine. All the
>drivers and info is here: http://www.ftdichip.com/
>
>This chip converts RS232 to USB and back.

Do not forget they also have a version that is a parallel interface, and in
some circumstances may be a better chip to use. Certainly the FTDI chips are
ideal ways to get started with USB.

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2003\08\29@055646 by Jon Jenkins

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It uses the standard COM port interface with
Windows and therefore with VB or Delphi or
whatever.

jon

--On Friday, August 29, 2003 10:38 AM +0100 Luis Moreira
<spamBeGoneLuis.MoreiraspamBeGonespamJET.EFDA.ORG> wrote:

> Hi Samo
> this is great, it's exactly what I needed but by any chance do you know
> how to interface it with VB.net
> thanks
>         Luis
>
> {Original Message removed}

2003\08\29@062346 by Hulatt, Jon

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It's the FT232BM, but running in "Bit Bang" mode. Have a squizz at the data
sheet:- http://www.ftdichip.com/Documents/ds232b11.pdf

jon

{Original Message removed}

2003\08\29@063630 by Alan B. Pearce

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>It's the FT232BM, but running in "Bit Bang" mode. Have a squizz at the data
>sheet:- http://www.ftdichip.com/Documents/ds232b11.pdf

No it is the FT245 chip series for the parallel interface. All the FT232
series are serial,

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2003\08\29@083042 by Peter Moreton

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Both the FT232 and FT245 support the D2XX 'direct' drivers which are
better and faster than the VCP 'Virtual COM' drivers. The VCP com port
drivers are easy to use, but for serious applications, the D2XX API is a
better choice.

Peter Moreton

> {Original Message removed}

2003\08\29@093215 by Wouter van Ooijen

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> The VCP com port
> drivers are easy to use, but for serious applications, the
> D2XX API is a
> better choice.

That is a rather careless use of the word 'serious'. My XWisp PC
software uses the VCP drivers, because this makes porting to Linux etc.
a zero-banana trick (tm). A better designation would be 'large
bandwidth'.

Wouter van Ooijen

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2003\08\29@114805 by T.C. Phelps

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Hi,

The company I work for specializes in USB enabled
devices, and each board uses either a TUSB3210
(there's also a TUSB3410 with extra stuff, but we
don't use that one):

http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=TUSB3210

or a Cypress -- I think it's one of the EZ-USB FX
line, the CY7C64613.

http://www.cypress.com/products/family.cfm?objectid=FC8F5931-5AFF-46AF-96FE79700B2CBB64&foid=FC8F5931-5AFF-46AF-96FE79700B2CBB64&usecache=true&catName=EZ%2DUSB%20FX#tabdata

The TI has an onboard 8052 microcontroller, the
Cypress has an 8051.

Both of those chips just let us hook directly up to
the USB Port on a computer, no worrying about serial
ports etc. I don't do any of the USB stuff, but the
guy who does tells me when he was learning about it,
he got a Cypress app note example for a USB enabled
mouse and it worked as a basis for all his stuff right
out of the box.

He also has a development kit for the Cypress, because
they didn't have a simulator for the chip he was using
-- but if you have an 8052/8051 simulator I'd think
that'd do the trick for both chips.

I'm not sure how easy it is to communicate on the PC
side with USB, but there are lots of Visual Basic
examples in our "Downloads" section:

http://www.phidgets.com/download/download.html

They might be specific to our app (again, not sure as
I don't work on the VB code either) but might have
some useful info.

If you're doing a one-off sort of thing maybe the
serial->USB chip would be better, if you're working on
a new product line then I think these chips bear
consideration...

Regards,
T.C.



> > --- Luis Moreira <Luis.MoreiraEraseMEspam.....JET.EFDA.ORG>
wrote:
> >> Hi Guys
> >> can anyone point me in the right direction... I
need
> >> to build a board with
> >> USB conectivity but do not know much about it,
need
> >> info badly.
> >> regards
> >>                 Luis


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2003\08\29@165220 by Jon Jenkins

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This is true but for quick and dirty
USB projects you can;t beat the COM
port interface.

jon

--On Friday, August 29, 2003 1:29 PM +0100 Peter Moreton <RemoveMEpeterEraseMEspamEraseMERIL.ORG.UK>
wrote:

> Both the FT232 and FT245 support the D2XX 'direct' drivers which are
> better and faster than the VCP 'Virtual COM' drivers. The VCP com port
> drivers are easy to use, but for serious applications, the D2XX API is a
> better choice.
>
> Peter Moreton
>
>> {Original Message removed}

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