Usb interfacing

[lufthansa747]

What is it you are trying to achieve?
i wanted to know if turing is able to interface through a usb port. i know it can do parallel but not sure about usb

Please specify what version of Turing you are using
4.1.1

[chrisbrown]

Nope. You can access installed joysticks, but that's using Windows's implementation, not direct hardware access.

[DtY]

Not really, but if you don't have a parallel port, you can order one of these: http://www.dealextreme.com/details.dx/sku.27180

[BigBear]

If you want to interface with a joystick chrisbrown is right and Here is a tutorial

[lufthansa747]

ok i am going to think about the interfacing with a joystick but had one question. DtY said i could get one of those cable would that give me the ability to have more input and outputs? because i am doing a computer engeniring project but because we are using parallel ports i am limited to 5 inputs and 8 outputs but i want to have more than that. is there any way i could get more?

[chrisbrown]

lufthansa747 @ Wed Jun 02, 2010 10:01 pm wrote:

because we are using parallel ports i am limited to 5 inputs and 8 outputs but i want to have more than that. is there any way i could get more?

If you have a parallel port already, DtY's link won't help you.

Let's say you have 1 output called A. You only have two option, A: off or A: on. Easy enough.

Now, two ouputs, A and B. By combining various logic gates (not necessarily AND), your possibilities are:

A: off AND B: off
A: off AND B: on
A: on AND B: off
A: on AND B: on

That's 4 outputs from 2 pins.

In general, the number of possible outputs is 2^n, where n is the number of output pins you have. There are two downsides to this method, however: first, the amount of circuitry required increases exponentially. Second, you can only use one output at a time. Using the 2-pin, 2-output method means you can always send data on each pin, regardless of what the others are doing. 2-pin, 4-output means you can only send data to one output at a time, as far as those two pins are concerned -- you can still use the others as you normally would.

If you want to pursue this option, I can show you how to develop eqations from truth tables, but I'm at work so I can't do it now.

[imseakin]

DtY @ Wed Jun 02, 2010 8:50 pm wrote:

Not really, but if you don't have a parallel port, you can order one of these: http://www.dealextreme.com/details.dx/sku.27180

I don't think that USB to Parallel port adapters work with Turing. I've tried it and since they don't have the same base hardware address as a built-in parallel port, Turing's parallel driver doesn't see the adapter.

Sorry

[mirhagk]

The original poster likely isn't even on this website anymore. If you are having problems with the USB to Parallel port adapter you can ask those questions (I see a problem right away if the USB is plugged into the computer as they won't actually be a parrallel port)