 How To Identify Usb Host Cable? |
OESF Forums > Distros, Development, and Model Specific Forums > Model Specific Forums > C1000/3x00 Hardware  |
 Apr 13 2006, 07:02 AM
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#16
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Group: Members Posts: 15 Joined: 27-July 05 Member No.: 7,710  |
some technical note:
the mini usb connector uses 5 contacs ( the normal "bigger" connector uses 4 contacts 2 for power/ground 2 for signals ) the mini usb connetor uses 2 for power 2 for signals and one magic conntact this conntact is not used on dump cable-changers but on hostcabels its wired ( maybe with resistor) to ground ( i am not shure if its ground or power, but it is linked with some outside connector ) so its possible for the usbdriver to check if there is an hostcable by asking the state of this magic pin. if it is an hostcable the driver turns power on and start useing it as host. if this magic pin has no connection then the driver uses client mode. so its possible to use any adaptor-cable by overrideing the driver function asking the state of the pin. ATTENTION !! this DESTROY your zaurus if you connect to an PC and switch in hostmode ....... ( i think .. i nerver tried it ... so my zaurus lives ) but you can also use some measure device and small needel s to check if your adaptercable has wired ( mybe with resistor ) pins between 1-2 or 4-5 ( depends how you are counting ) if it is wired you got an hostcable if not its and dump changer ... ih hope this helps |
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Apr 13 2006, 05:03 PM
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#17
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 Group: Members Posts: 2,808 Joined: 21-March 05 From: Sydney, Australia Member No.: 6,686 |
QUOTE(Viking @ Apr 14 2006, 01:02 AM) some technical note: the mini usb connector uses 5 contacs ( the normal "bigger" connector uses 4 contacts 2 for power/ground 2 for signals ) the mini usb connetor uses 2 for power 2 for signals and one magic conntact this conntact is not used on dump cable-changers but on hostcabels its wired ( maybe with resistor) to ground ( i am not shure if its ground or power, but it is linked with some outside connector ) so its possible for the usbdriver to check if there is an hostcable by asking the state of this magic pin. if it is an hostcable the driver turns power on and start useing it as host. if this magic pin has no connection then the driver uses client mode. so its possible to use any adaptor-cable by overrideing the driver function asking the state of the pin. ATTENTION !! this DESTROY your zaurus if you connect to an PC and switch in hostmode ....... ( i think .. i nerver tried it ... so my zaurus lives ) but you can also use some measure device and small needel s to check if your adaptercable has wired ( mybe with resistor ) pins between 1-2 or 4-5 ( depends how you are counting ) if it is wired you got an hostcable if not its and dump changer ... ih hope this helps  I would be very careful with doing this. In host mode, the Z is expected to provide power while in client mode, the host pc will provide power to the Z which it is not supposed to accept, because if it does, it fries  If you really can't find a host cable, then you are better off hacking a normal cable and connecting the magic pin. There is plenty of guides online with picture illustrations showing how this can be done. I would advise not to change the behaviour in the driver/software code since accidents may happen and you can accidentally switch mode or worst, misconfigured hotplug mechanism does it for you and suddenly, your Z is smoking.
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Apr 14 2006, 07:35 AM
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#18
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Group: Members Posts: 15 Joined: 27-July 05 Member No.: 7,710 |
QUOTE(Meanie @ Apr 14 2006, 02:03 AM) I would be very careful with doing this. In host mode, the Z is expected to provide power while in client mode, the host pc will provide power to the Z which it is not supposed to accept, because if it does, it fries If you really can't find a host cable, then you are better off hacking a normal cable and connecting the magic pin. There is plenty of guides online with picture illustrations showing how this can be done. I would advise not to change the behaviour in the driver/software code since accidents may happen and you can accidentally switch mode or worst, misconfigured hotplug mechanism does it for you and suddenly, your Z is smoking.I said this with ATTENTION !!!!! and mentioned that this will kill the zaurus. ( connectiong to an 6 Volts powered hup is also a bad thing ) but for detecting if an plugcable is host or for client use, its very easy to measure it with an multimeter .... |
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Jul 3 2006, 11:30 AM
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#19
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Group: Members Posts: 21 Joined: 8-September 05 From: Europe/Croatia/Zagreb Member No.: 8,062 |
I have Zaurus C1000 and i need USB host cable. I can buy this USB cable pack from Sweex, but i don't know it contains USB host cable?
Is USB host cable = cable with USB mini 5 pin connector? http://www.sweex.com/product.asp?pId=479 http://www.sweex.com/product.asp?pid=479&s=0 Regards, Toni |
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Jul 3 2006, 01:16 PM
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#20
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Group: Members Posts: 2,808 Joined: 21-March 05 From: Sydney, Australia Member No.: 6,686 |
QUOTE(beresmed @ Jul 4 2006, 05:30 AM) I have Zaurus C1000 and i need USB host cable. I can buy this USB cable pack from Sweex, but i don't know it contains USB host cable? Is USB host cable = cable with USB mini 5 pin connector? http://www.sweex.com/product.asp?pId=479 http://www.sweex.com/product.asp?pid=479&s=0 Regards, Toni it's probably a mini b which is also 5 pin chances are if it does not mention mini a, then it is not a mini a besides, mini a should have a white enclosing but not everyone is following this standard |
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Jul 3 2006, 01:17 PM
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#21
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Group: Members Posts: 253 Joined: 22-December 04 Member No.: 6,002 |
QUOTE(beresmed @ Jul 3 2006, 07:30 PM) I have Zaurus C1000 and i need USB host cable. I can buy this USB cable pack from Sweex, but i don't know it contains USB host cable? Is USB host cable = cable with USB mini 5 pin connector? http://www.sweex.com/product.asp?pId=479 http://www.sweex.com/product.asp?pid=479&s=0 Regards, Toni The USB host adapter is mini 4 pin type A male to 4 pin type A female. I'm not sure if this includes the right adapter, as the image is far too small to make out the adapter. It likely does, but I cannot be positive. |
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May 10 2007, 10:13 AM
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#22
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Group: Members Posts: 65 Joined: 22-August 06 From: Miami, Fl USA Member No.: 10,923 |
QUOTE(Tom61 @ Jul 3 2006, 02:17 PM) QUOTE(beresmed @ Jul 3 2006, 07:30 PM) I have Zaurus C1000 and i need USB host cable. I can buy this USB cable pack from Sweex, but i don't know it contains USB host cable? Is USB host cable = cable with USB mini 5 pin connector? http://www.sweex.com/product.asp?pId=479 http://www.sweex.com/product.asp?pid=479&s=0 Regards, Toni The USB host adapter is mini 4 pin type A male to 4 pin type A female. I'm not sure if this includes the right adapter, as the image is far too small to make out the adapter. It likely does, but I cannot be positive. Just as a confirmation, i bought the 6:1 kit from Walgreens and the connectors work like a charm. Unfortunately now I've got a 6 foot USB Host cable, where I need to plug in my 6ft cable USB GPS. I walk around with a Z in one hand and 12 feet of wire in the other 
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Jul 20 2007, 04:26 AM
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#23
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Group: Members Posts: 474 Joined: 21-May 06 Member No.: 9,928 |
If anyone is stuck and likes to take the risk of making a homebrew one I've documented how to make a normal mini-b plug into a mini-a plug.
I've posted somewhere on OESF about it and it's documented on my home page. Since the documentation I've also made one very much shorted (so short that the metal shealding od the connectors are soldered together). It's very neat but be carfull because such a short one fas no flexibility ... a usb dongle will stick out a lot from the back of the Z and if you knock it anywhere you may damage the Z. |
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Lo-Fi Version | Time is now: 19th June 2013 - 11:55 PM |