I like the idea. Seems simple and easy. With small oscillator and other parts it will be possible to put it inside the case without problems(I mean "inner inside" - leaving space near the battery free for mods) - kind of the mod Werner did with his internal debug board.
What drawbacks can we have after doing this? What I would like to know from hardware folks is will it affect charging/usb host mode etc.? Leonti On Sat, Jan 24, 2009 at 12:29 AM, Rask Ingemann Lambertsen <[email protected]> wrote: > On Wed, Jan 21, 2009 at 02:44:50AM -0800, scholbert wrote: >> >> Hi, >> >> after having a deeper look into the schematics of freerunner, i realized >> that most of the pins of the Glamo camera interface are physically >> accessible at the resistor networks RP1801..1804. > [snip] > >> Any comments are welcome! > > I've also thought about ways of adding an internal camera to a GTA02. > There's a camera controller in the s3c2440, but most of its pins have been > assigned for other purposes as GPIO and they may not be accessible in the > first place. So I've scrapped that idea. > > Then I saw that there's an internal USB host controller which is only > used for Bluetooth connectivity. It should work fine with a USB camera as > well. I haven't had a look inside my GTA02 yet, so I don't know which of the > following options are realistic: > > 1) Just disconnect the BT chip and route the power and D+/D- to the > camera instead of the BT chip. > 2) Add an internal USB hub, reroute BT D+/D- through the hub, connect camera > D+/D- to the hub. Think of more USB devices to include while we're at it. ;-) > > Power: > > Ad 2) Find an unused GPIO pin somewhere to control camera power, use > wired-or for hub power (or use another unused GPIO pin). E.g. PCF50633 pin > 14 "GPIO3". > > I don't know yet where to find room for the camera. Having not yet had > the cover off my GTA02, the only unused space I know of is that next to the > battery, right over the µSD slot. The camera would then be mounted on the > inside of the battery cover, pointing away from the display. There'd be a USB > connector of some sort towards the side of the GTA02 for the electrical > connection. > > Pros of the USB way: Very simple electrically with only four wires to > connect. Uses existing USB drivers. > Cons of the USB way: Lack of a camera suitable for USB 1.1. I have yet to > find one that does more than 800x600 compressed or 176x144 uncompressed. > Higher resolution still images ought to work fine over USB 1.1, but the > camera firmware needs to allow it. > > Btw, if you think modding a GTA02 to include a camera is wicked, read > this: > http://beta.ivancover.com/wiki/index.php/Eee_PC_Internal_Upgrades > - "it does not bulge much at all" :-) > > -- > Rask Ingemann Lambertsen > Danish law requires addresses in e-mail to be logged and stored for a year > > _______________________________________________ > hardware mailing list > [email protected] > http://lists.openmoko.org/mailman/listinfo/hardware > _______________________________________________ hardware mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/hardware
