PSP on tv (homebrew app idea)

[uberfry]

Hi folks,
I've thought of a strange method to put the PSP picture on TV...

But to start: is the PSP's USB 2.0?
Because then there would be enough bandwidth for transferring the pictures to the TV;

- 480 * 272 pixels * 3 Bytes (24Bit color) = 382.5kB for one raw image
- at least 90% of 480Mbit/s (= 54MB/s) is available (considering bandwidth loss due to cable length)
- the PSP's LCD has a typical clock of 9MHz (which results in around 25MB/s)

Why do this?

- it sure would be fun to play Ghost In The Shell or similar games using a normal gamepad instead of this crappy
- not everyone wants to void the warranty of their PSP (PSP2TV)
- PSP2TV is expensive

Guess there would even be enough bandwidth available to use a Dualshock controller or so along with it...

If anyone is willing to help me, please post here or pm me...

P.S.: I am taking care of the hardware part (translating the usb signals into vga signals and input of the DS controller using an fpga)
P.S. #2: Please avoid any posts concerning me being an asshole or any other unrelated subjects (flames i.e.). Thank you.
P.S. #3: by flames I actually mean stupid useless comments (stuff like "you won't make it" or "give up") - keep it to yourselves. thank you.

[alpha]

i thought about this the other day, but wouldnt be a psp2vga enough? this way we wont be needing special hardware as almost veryone got a pc with usb. and the signal of the pc can be displayed on a tv through tv-out.

something like this

psp(running an app capturing the signals and converting them to a stream) -> usb -> pc(hosting app translating the signals into pictures) -> vga

juts a thought...

[uberfry]

well sure, that's a great idea
but I also want to contribute, but I'm open for that idea also

[uberfry]

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[uberfry]

is there any sourcecode for a screenshot plugin?
or does anyone know how to make one?

[keelanM]

is this going to be like that program that allows you to see whats going on your computer by sending a jpeg and refreshing it or is this going to be video fed from the psp to tv in realtime

pm and ill see if a can help

[Xenogears V]

Good Idea!.

[psptim]

What would be better is if the PSP had a headphone socket like that on an iPod photo. Then you could simply plug the special AV cable straight into the TV.

[Satoshikun]

What would be better is if the PSP had a headphone socket like that on an iPod photo. Then you could simply plug the special AV cable straight into the TV.

....lawls. If only.

[bigdaddie]

this is an old story, in early 2006 Lok Tai (Andy) Fung made a little prog to stream tv on your psp, but unfortunately due to lack of time he didn't developed it further look here

[Bytrix]

this is an old story, in early 2006 Lok Tai (Andy) Fung made a little prog to stream tv on your psp, but unfortunately due to lack of time he didn't developed it further look here

What we're talking about here is nothing like that. We're talking about streaming video FROM the PSP to a PC/monitor (or TV with a hardware convertor).

Using the ideas here I've been looking into the USB interface (as I've never used it on the PSP before), and I'm looking into the possibility of streaming the video memory out over the USB port as a raw memory dump per frame (in my own homebrew, not as an OE plugin).

The recieving app shouldn't be too complicated only gathering the info, looking out for 'end of frame' markers and converting to an image.

I have no idea if the PSP is fast enough to do this or what sort of error rate there is transferring over PSP. If we simply took the data from the PSP and converted to screen we could get alot of bad pixels and data, this would however be the simplest/fastest option.

To ensure picture quality we'd have to use some sort of error control on the recieving app which would send signals back to the PSP if the data was incorrect/correct and tell the PSP to send the next batch (or re-send the last one). I don't know how much this would slow down the sending of the stream...

I should get some time to try and mess with this in the next few days to see if I can get anything working at all.

[uberfry]

I've done a hardware converter for psp-to-tv, but it involves opening it, and I don't think FPGAs are cheap in single quantity... (actually it replaces the LCD all along...)
We could use my custom macro and just embed the usb host macro (available at opencores)

[Malc`]

This is an excellent idea, but I dont see how you could use the usb to have TV out AND a dual shock controller plugged in?

I wish I could do more to help, but sadly I know nothing about coding or anything. Anyway it certainly seems you have done your research - good luck!

[Cyclone57]

Cyclone57 loves this idea.
Cyclone57 says go for it.
:P.

[uberfry]

This is an excellent idea, but I dont see how you could use the usb to have TV out AND a dual shock controller plugged in?

I wish I could do more to help, but sadly I know nothing about coding or anything. Anyway it certainly seems you have done your research - good luck!

streaming via usb --> looking for the address where the buffer for the lcd is and sending it over usb
TV --> by making the fpga receive the usb data and accordingly converting it to normal video+audio (read above...)
DS controller --> fpga will take care of converting the DS's controller signals into usb data, which is then translated inside the psp into the correct buttons