Re: Parallel Port Interface between PIC and PC
- From: Rich Grise <richgrise@xxxxxxxxxxx>
- Date: Thu, 19 May 2005 18:48:55 GMT
On Tue, 17 May 2005 16:55:52 -0700, Rajiv Ghanta wrote:
> Roger Hamlett wrote:
....
>> These are designed as 'demo' modules, for people who don't want to
> spend
>> the time and money, to implement the suface mount FTDI chip, and the
>> connections for USB etc., but are a great way for small projects to
> get a
>> reliable USB interface, without any development time.
>>
> it is interesting that you brought this up. as i mentioned, the robot
> does have a usb port, and in fact i did try to use FTDI's FT8U245AM chip
> (packaged in a module similar to the one you described). using this chip,
> i was able to easily transmit data via parallel from the PIC to the FTDI
> chip. i plugged the device into my windows xp machine, and downloaded the
> virtual com port drivers off of the ftdi website, and everything worked
> like a charm. however, the laptop on the robot uses qnx. there are third
> party drivers listed on the ftdi website for qnx
> (http://gleb.qnx.org.ru/index_en.html), but i had serious problems trying
> to install these drivers, which led me to give up on that route.
Oh, OK - you already know about FTDI, for example
http://www.alphamicro.net/components/product.asp?id=410&line=9
But wouldn't you use that on the PIC end, as the laptop already has USB?
And I can't imagine QNX not having USB drivers, maybe even already built
in?
I plug my little Fuji camera into my USB and it just shows up like a
drive. I have to mount it and unmount it, of course. This is Slackware,
but isn't QNX just another *nix implementation?
And I've seen some pretty amazing things done over USB. It would
definitely take some study, I'd think.
I wonder if, if you took ownership of, say, /dev/par , it would let
you write directly to the hardware?
Good Luck!
Rich
.
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- Parallel Port Interface between PIC and PC
- From: Rajiv Ghanta
- Re: Parallel Port Interface between PIC and PC
- From: Roger Hamlett
- Re: Parallel Port Interface between PIC and PC
- From: Rajiv Ghanta
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