Author Topic: PSP + Accelerometer (Read 21952 times)

EliteGamer83 · « **on:** March 27, 2009, 06:01:26 AM »

I was just do'in my thing, putting around RadioShack looking for cool stuff (Yes you know your a dork when you get excited over new electronics parts

) Anyways, I don't know why I never really thought of it before and I'm not sure if it has been done before. But I think a new neat mod should find some way to use an accelerometer. Does anyone know if this has been done before and if it hasn't any ideas for a way to incorporate this into a PSP to work?

Link: http://www.radioshack.com/product/index.jsp?productId=2909788

redrider · « **Reply #1 on:** March 27, 2009, 04:15:07 PM »

if you mean like when your playing like a racing game and you tilt you psp to the right or the left and the car steers to the right or the left, then yes this has been done before. I can remember where I saw it but there is a video on it.

EliteGamer83 · « **Reply #2 on:** March 27, 2009, 04:47:44 PM »

It was a wii controller on the PSP. So you needed to Wiimote too, it would be neat to see someone do this but it would be 100% PSP efficient no other hardware required.

Blizzrad · « **Reply #3 on:** March 27, 2009, 06:09:08 PM »

There is a very expensive (though nicely compact and detachable) accelerometer based third party motion sensor made to be used with the PSP. There are demo videos of it being used on youtube, search for PSP motion kit.

EliteGamer83 · « **Reply #4 on:** March 27, 2009, 06:27:26 PM »

Quote from: Blizzrad on March 27, 2009, 06:09:08 PM

There is a very expensive (though nicely compact and detachable) accelerometer based third party motion sensor made to be used with the PSP. There are demo videos of it being used on youtube, search for PSP motion kit.

Neat, but it can only run some cheesy homebrew apps, I mean actually make something INSIDE the PPS that you can play like Burnout with. I mean a guy played a real racing game ith a wii controller on a PSP so there must be a way to do it, but you would need a insane modder like f00 or uhm.. 2 other guys can't remember the names at the moment.

Blazinkaos · « **Reply #5 on:** March 27, 2009, 11:53:23 PM »

i think it is its just a matter of time to figuring it out

EliteGamer83 · « **Reply #6 on:** March 28, 2009, 07:38:44 AM »

Yeah and a good programmer too.

gamerdude767 · « **Reply #7 on:** March 28, 2009, 07:42:23 AM »

would'nt you wire the accelerometer to the left and right pins on the zip connecter somehow?

EDIT: yeah you would need to program a chip to recognize the x and y (or what ever letters it is) movements..

also if you could do this it would be sick :P

EliteGamer83 · « **Reply #8 on:** March 28, 2009, 08:00:02 AM »

Hehe maybe someday I will... I'm just an intermediate modder not expert or anything. Maybe Ghost or Blizzrad could figure it out. I'm not good with code/software.

alentris · « **Reply #9 on:** March 28, 2009, 08:08:57 AM »

Quote from: EliteGamer83 on March 28, 2009, 07:38:44 AM

Yeah and a good programmer too.

It's actually pretty much a REALLY easy PIC code, except i don't have any pic flashing kits.

EliteGamer83 · « **Reply #10 on:** March 28, 2009, 08:32:17 AM »

I wonder if R & D would work on this...

Know anyone who can write code?

Blazinkaos · « **Reply #11 on:** March 28, 2009, 08:22:33 PM »

have tried asking them..

EliteGamer83 · « **Reply #12 on:** March 28, 2009, 09:03:52 PM »

Have I? no. But this doesn't necessarily have to be R & D, it could be just a personal projects with some help from fellow AM + SM modders.

Blazinkaos · « **Reply #13 on:** March 28, 2009, 09:24:30 PM »

yea true hmm ill try idk how much help i can do

Alien_X · « **Reply #14 on:** April 01, 2009, 09:49:52 AM »

How can anyone state it is easy microcontroller code if they haven't done it?

Anyway, there are several ways in which a mod like this could be accomplished : -

Easy method - Wire 4 tilt switches into the psp dpad (Connections between individual button signals and ground), and then epoxy them underneath the daughterboard in up, down, left, right configurations.

Proper method - Use a 2 axis (X,Y) accelerometer such as the ADXL203, use a microcontroller (PIC/AVR) to read the X,Y analog values and interpret these accordingly - if the interface is via the analog stick then there would have to be trial and error to find what operations would have to be carried out on the received data so that the tilts would correspond to normal (PSP) analog movement in each direction. Since this is an analog (Variable X/Y output - accelerometer) -> analog (Variable resistance -> interpreted as X/Y values - analog stick) interface it is relatively simple. The accelorometer could be configured to send data through either analog (microcontroller would then use the built in ADC) or PWM outputs.

If however you want to interface the accelerometer to digital buttons (Two states on, off - High, low) it is slightly easier, however the effect would be pretty much the same as using tilt switches, except in a much more complicated variant. You would have to read the Analog values for the 2 axis output (Disregarding one axis) when the controller is in what would be defined as left and right tilts, and then assign any value greater than this or less than this to left and right tilts respectively. This interface would only be using One axis (Because with racing games, generally you only use left and right for steering if using the dpad at all)

Hope this helps

pspupgrade · « **Reply #15 on:** April 01, 2009, 11:22:06 AM »

There was discussion on this subject about a month ago. There's a way where you can just make some ball bearing system, where you tilt the PSP, ball bearing rolls and acts like a switch. You could maybe fit that internally in the PSP, and wire it up to it.

Guide at http://www.instructables.com/id/SW6Y7TSF4LPLSVH

Pretty simple, to be honest, and it should work fine.

Alien_X · « **Reply #16 on:** April 01, 2009, 11:50:04 AM »

Yup, same as a tilt switch and would only work for digital buttons.

Blazinkaos · « **Reply #17 on:** April 01, 2009, 03:39:04 PM »

yea like the one for the gh controller..

alentris · « **Reply #18 on:** April 01, 2009, 04:28:36 PM »

Quote from: Alien_X on April 01, 2009, 09:49:52 AM

How can anyone state it is easy microcontroller code if they haven't done it?

It was said by the last person who did this, the user "

"

Blazinkaos · « **Reply #19 on:** April 01, 2009, 05:53:54 PM »

u lost me..

EliteGamer83 · « **Reply #20 on:** April 01, 2009, 06:03:10 PM »

Quote from: Blazinkaos on April 01, 2009, 05:53:54 PM

u lost me..

hehe I feel the same

Alien_X · « **Reply #21 on:** April 02, 2009, 12:21:07 AM »

Waste of time that was then

Quote from: alentris on April 01, 2009, 04:28:36 PM

It was said by the last person who did this, the user ""

What does that mean? If you had experience with microcontrollers then I would be willing to accept that opinion.

But anyway, regardless it is easy code

bustinthejustin · « **Reply #22 on:** April 04, 2009, 12:01:13 PM »

I think he means P V P. But Elite, this is something that requires some actual electronics knowledge... It's more than likely that Alien has an electrical engineer background or something like that. It'd be way too difficult for someone to explain to you everything you need to know to do this the way Alien has explained it.

Blazinkaos · « **Reply #23 on:** April 04, 2009, 11:14:23 PM »

mmm stuff isnt easy to i tried readying up on it

Hazer · « **Reply #24 on:** April 06, 2009, 08:30:15 PM »

I will be repairing a broken PSP1000 next week. I may have a go at this.

GhoSt · « **Reply #25 on:** April 06, 2009, 09:58:23 PM »

Quote from: Hazer on April 06, 2009, 08:30:15 PM

I will be repairing a broken PSP1000 next week. I may have a go at this.

If you get this working, share the code

Alien_X · « **Reply #26 on:** April 07, 2009, 01:20:47 PM »

Quote from: Blazinkaos on April 04, 2009, 11:14:23 PM

mmm stuff isnt easy to i tried readying up on it

What were you reading?

Quote from: Hazer on April 06, 2009, 08:30:15 PM

I will be repairing a broken PSP1000 next week. I may have a go at this.

Nice! I would be interested to know how you plan to implement it - With an accelerometer interfaced to the analog stick?

If it would be interfaced to digital buttons then A. It would be pretty much pointless B. The same effect could be had with "tilt switches".

ps: Awesome wii mod! Can't wait to start working on mine.

Hazer · « **Reply #27 on:** April 07, 2009, 07:57:00 PM »

The right way is to use an accelerometer, just like you suggested. From the begining, it seems having it react like an analog control is what would be worth doing.

So, an accel chip for input, and transfer that to the only analog input the PSP has: The stick. Like I said, I have a broken one with a bad screen coming shortly. I planned to rebuild it with clear buttons and new case, so while those parts are coming in I will start to reverse the analog stick circuitry. I am hoping that I can piggy-back a PWM signal right into the connections to keep the circuit complexity down. I also want it so that the stick can be used without the motion sensing. I dont want to replace it altogether.

I will post my initial findings as things evolve.

Alien_X · « **Reply #28 on:** April 08, 2009, 01:04:49 AM »

Cool, I have done the same thing (Piggybacking + PWM) before and it seemed to work fine. The hardest part I found was fine tuning everything, although you are alot better than me with microcontrollers so it shouldn't be a problem.

conker · « **Reply #29 on:** April 09, 2009, 03:18:33 PM »

Quote from: pspupgrade on April 01, 2009, 11:22:06 AM

There was discussion on this subject about a month ago. There's a way where you can just make some ball bearing system, where you tilt the PSP, ball bearing rolls and acts like a switch. You could maybe fit that internally in the PSP, and wire it up to it.

Guide at http://www.instructables.com/id/SW6Y7TSF4LPLSVH

Pretty simple, to be honest, and it should work fine.

already done it with a few changes wasn't very fun after a while
i have removed it from my psp for more room

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Author Topic: PSP + Accelerometer (Read 21952 times)