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romero126 · Joined: 24 Dec 2005 Posts: 200

The PSP uses a system called USB To Go which allows for the ability to use hardware without drivers on the system which means, the device when connected to it sends its information to the PSP which in return the PSP sends a connection transmission.

The system USB-To-Go allows for foreign objects to incorperate itself with the non computer devices.

The reason why it uses USB-To-Go is because it allows for certain digital camera's to connect to it via the USB connection (It has been confirmed).

In short an obvious position would be learning how USB-To-Go work's by mimicing some connection based information from devices that work through the USB connection.

sandberg · Joined: 05 Oct 2005 Posts: 90 Location: Denmark

You can find most information needed from the link below.

http://www.usb.org/developers/onthego/
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Br, Sandberg

cheriff · Regular Joined: 23 Jun 2004 Posts: 262 Location: Sydney.au

romero126: Do you have anything to back these assertions, where has it been confirmed?
I was under the impression that "USB on the go" (i assume thats what you mean, cant find any reference to 'usb to go') has been ruled out. Otherwise why are the external power pins required if the protocol allows power to be negotiated and supplied over the cable?
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Damn, I need a decent signature!

romero126 · Joined: 24 Dec 2005 Posts: 200

Considering that the Microcontroller for the USB device is connected to the CPU creates the possibility that the Infrastructure is dynamic and based upon the firmware. The fact is that the leads to the USB connector on the PSP itself is still connected to a voltage based system (IE power to the object) The fact that it doesnt supply that voltage out can create two assumptions. 1, it uses a propriatary based driver system which has yet to be implimented or 2, it uses a syn/ack system used for devices.

With certain programs IE: Talkman it uses a USB based microphone to check pronounciation with the user.

Which of course creates another question. Why would the microphone on talkman work when there is currently no voltage going through it?

If you look at the concept work from Sony during last years E3 it had concept work of usb based devices such as a Keyboard, GPS device, Digital Cameras. Why would they create such a system with such a concept when there was no built in hardware contributing to such concepts?

If you look at your pictures folder you will notice that there is a Digital Camera Images folder already setup inside the system. Which can create one assumption that the system is already implimented for the USB based connection for certain types of Digital Cameras.

Here are some Refrences:
http://www.engadget.com/2004/05/17/live-from-e3-more-psp-pics/
http://www.joystiq.com/2005/08/25/psixs-digital-camera-linkup-and-media-playback-for-the-psp
http://www.pspbrew.com/wiki/index.php/USB_Connectivity
http://www.gamesindustry.biz/content_page.php?aid=10752

cheriff · Regular Joined: 23 Jun 2004 Posts: 262 Location: Sydney.au

jimparis · Joined: 10 Jun 2005 Posts: 1179 Location: Boston

The guy in that Breakpoint talk said that the PSP can only be a USB peripheral and that devices like a USB keyboard would need to contain host controllers. Hasn't this already been beaten to death by now?

romero126 · Joined: 24 Dec 2005 Posts: 200

I was actually working towards that statement, that USB keyboards need to compatible with the USB on the GO protocol which requires a micro controller to broadcast its drivers to the device.

I also believe we should focus more on USB based devices as a source for input instead of useing an IRDA based input. In order to progress in the PSP hardware hacking we must first create some sort of USB on the Go programmable device. So we can interject any perpherial we want into the PSP. (End of rant)

jimparis · Joined: 10 Jun 2005 Posts: 1179 Location: Boston

It doesn't have to be OTG. Any host controller like the Cypress SL811HS would be fine, as would your PC. Regardless, the hard part isn't the host side, it's that we still know nothing about how to use USB on the PSP side.

romero126 · Joined: 24 Dec 2005 Posts: 200

Nobody has spent time to reverse engeneer the current products out on the USB for PSP.
Everyone focus's on how to port a keyboard to the PSP via IRDA which is an ass backwards way to run a keyboard controller unless you flip the immage. Or working on the serial port.

Dr. Vegetable · Posted: Fri Jan 06, 2006 6:48 am Post subject:

IR PDA keyboards are a natural fit for this application. They are compact, low power, and can be inexpensive, especially since no custom cabling is required. I've seen at least three different IR keyboards working with the PSP, and zero projects that have gotten a keyboard working via USB. So please don't try to discourage people from refining this IR keyboard support.

People are also studying the PSP's USB functionality, but there is not too much to go by with virtually no peripherals available. I encourage you to help this effort however you are able.

What is not helpful is when people make assertions that are not supported by any facts. There is too much mis-information and speculation floating around as it is. Digging through statements like the one at the top of this thread cost mental energy that I'd rather direct elsewhere.

romero126 · Joined: 24 Dec 2005 Posts: 200

Dr. Vegetable · Posted: Fri Jan 06, 2006 9:14 am Post subject:

Gizmo · Joined: 05 Feb 2005 Posts: 14

BlackPaladin · Posted: Sat Jan 07, 2006 10:54 am Post subject:

Man, when I posted a similar thread I had no idea how emotional people can be on this subject.

Can't we all just get along? :) Guys, this is a friendly place, lets play nice.

Until we have the specs anything is possible or impossible depending on your outlook. Keep in mind that any information out of Sony is tainted due to their own corporate goals and perspective just as any individual has a "tainted" opinion. Facts are lacking on ALL sides.

Lets just do what we can to work on USB support and be happy that others care enough to want to help out.
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Unix Junkie

mrbrown · Joined: 17 Jan 2004 Posts: 1536

For Christ's sake BlackPaladin start contributing something useful to these threads or start finding your posts shortened. All of the speculative crap you've posted in other threads has been beaten to death as others have politely pointed out. Either come with some new or useful information about how USB works on the PSP, or go sit down somewhere.

romero126 · Joined: 24 Dec 2005 Posts: 200

This is kind of old but..

http://peripherals.hackaday.com/entry/1234000523067226/

romero126 · Joined: 24 Dec 2005 Posts: 200

psx-frogger · Joined: 16 Jan 2006 Posts: 5

Hi all,

do you know what is the enbedded usb chip enclodes into the PSP ?

It will be more easier to find documentation about this chip.
and why not later, be able to write own usb driver !

regards

psp-frogger

anunakin · Joined: 27 Jul 2006 Posts: 6

I have a Zaurus Linux PDA, and this have a USB OTG (On The Go) port.... this port is a USB mini AB port, this accept both USB mini A and mini B, but PSP has a mini B port... what is diff?

B ports are for plug periferals to PCs
A ports are for plug PCs to periferals
AB ports act as a B ports with a B cable and as a A port with a USB OTG cable:

Here some pics of OTG cable this have a mini A male to A female, on PDA Zaurus I can connect many hardware, but needs drivers to use it ....

I mean PSP not have a USB OTG port, or it dont respect IEEE rules, and uses a mini B (fit like) with a mini AB hardware... not a surprize ... this was made by $ony!

More info:

http://www.nxp.com/acrobat_download/literature/9397/75009316.pdf
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Anunakin