HalfNelson
Still Fresh
- Joined
- May 26, 2004
- Messages
- 16
Instead of hacking a cable, what is wrong with a passive Female Type A - Female Type A gender changer? $5 bucks (AUD) or so.
GP32 Reading Usb Pen Drive From Gamepark Cont.
- Thread starter HalfNelson
- Start date
Octavious
Programer Guru! ...in the making
question to squidge,
do you honestly think you could do this?
it would be so awesome, but I dont want to get my hopes up
well, all the luck to ya! hope you make it
~Octavious
im sure ou have everyone in the communtiy cheerijn ya on also
do you honestly think you could do this?
it would be so awesome, but I dont want to get my hopes up
well, all the luck to ya! hope you make it
~Octavious
im sure ou have everyone in the communtiy cheerijn ya on also
HalfNelson
Still Fresh
- Joined
- May 26, 2004
- Messages
- 16
Bit of progress guys. Ported the USB code for the root hub and the USB library across from the U-Boot project after removing all of the code's dependancies on other files in U-Boot. Wrote a quick and dirty console to allow printf to work and tested it out. The first thing was i forgot to unplug my pc-link cable and as soon as a ran my usb test code, windows found a new usb connection and borked about drivers. After running without the cable, the usb code correctly detected the OHCI USB_ROOT_HUB on the gamepark and all diagnostics indicate that it ready to accept new devices. Just waiting on my USB Gender changer and then i can start porting the Mass Storage Driver.Squidge
Certified Guru
I reckon so, but I can't start on it for a few weeks yet, so lets see what HalfNelson comes up with in that time.question to squidge,
do you honestly think you could do this?
it would be so awesome, but I dont want to get my hopes up
well, all the luck to ya! hope you make it
~Octavious
im sure ou have everyone in the communtiy cheerijn ya on also
Last edited by a moderator:
sam fisher
Well-Known Member
cool. How big pen drives would we be able to use?
toholl
Still Fresh
OHCI driver is already implemented into the gp32linux kernel, coming from s3c2400 host driver.
The problem is: we need 5v power.
2 solutions:
- build a simple usb adapter with a 5V alim inside
- use existing usb hub 5V alim (need to be confirmed).
And it should work...
Toholl
The problem is: we need 5v power.
2 solutions:
- build a simple usb adapter with a 5V alim inside
- use existing usb hub 5V alim (need to be confirmed).
And it should work...
Toholl
toholl
Still Fresh
You will need power for all 'not self powered' usb devices, like keyboard and usb pen...
Vimacs
Don't be evil!
toholl when i go to mod a cheap usb keyboard is there a chance that it works with the current gplinux build?
Octavious
Programer Guru! ...in the making
whats that mean in normal english lol
~Octavious
Vimacs
Don't be evil!
Last edited by a moderator:
toholl
Still Fresh
Vimacs: I don't know; I need to build my own usb adapter and test it.
But in theory, it should work.
But in theory, it should work.
Vimacs
Don't be evil!
k i will try it when i get a cheap kb
RomHacker316
Member
If I read it correctly it means he has his GP32 set up so that at the point it could connect some external memory to it. All he needs is an adaptor to allow the connection to the GP32's port.
Last edited by a moderator:
Squidge
Certified Guru
Almost. It seems that he's at the point that it will recognise a device attached to that port (eg. a pendrive), but will not actually talk to the device. The talking part would be the "mass storage driv
Last edited by a moderator:
RomHacker316
Member
Oops. Sorry, I missed the part about the driver because I was at bouncing between things at work. Sorry for any confusion. Thanks for the correction Squidge
RomHacker316
Member
I dont think that would do anything. Most hubs dont work that way. Plus a normal hub is powered by the connection to the PC so you'd need a power adaptor to power the HUB which wouldnt be very portable.(unless it was done with a battery pack of some sort)
HalfNelson
Still Fresh
- Joined
- May 26, 2004
- Messages
- 16
Hrm.. Upon closer inspection, this might require a special circuit before it can work.
The DP0 and DN0 pins of the usb port in a device are wired differently to a hosts DP0 and DN0 pins (data pins).
A device (in this case our GP32) has one of them pulled to ground with a 470K resistor and the other pulled to 3.3V with a 1.5K resistor.
The way a host is wired up is both pins are pulled to ground via 15k resistors.
Time to hit the old electrical text books again I suppose. there is hope though because the way it sends a one is to make one pin at least 200mV greater than the other, and the other way for a 0 so we dont need to get the pins to be 3volts apart.
(data obtained from smdk2400 reference board circuit diagram and usb 1.1 specification)
The DP0 and DN0 pins of the usb port in a device are wired differently to a hosts DP0 and DN0 pins (data pins).
A device (in this case our GP32) has one of them pulled to ground with a 470K resistor and the other pulled to 3.3V with a 1.5K resistor.
The way a host is wired up is both pins are pulled to ground via 15k resistors.
Time to hit the old electrical text books again I suppose. there is hope though because the way it sends a one is to make one pin at least 200mV greater than the other, and the other way for a 0 so we dont need to get the pins to be 3volts apart.
(data obtained from smdk2400 reference board circuit diagram and usb 1.1 specification)
Octavious
Programer Guru! ...in the making
So, I seem to be confused
will there be a cord from inside the 32 thast goes to a recieving end of a USB port and will that just be a hole in the unit?
I believe thas the deal.. but...
well, luck to ya, I and others hope it works
~Octavious
will there be a cord from inside the 32 thast goes to a recieving end of a USB port and will that just be a hole in the unit?
I believe thas the deal.. but...
well, luck to ya, I and others hope it works
~Octavious
