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WL500g with 2 usb ports - Page 2
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Thread: WL500g with 2 usb ports

  1. #16
    Quote Originally Posted by wtzm
    Just an amandment to gwl's post: In my opinion there is no clock generator needed/involved in any way; this seems to be a misinterpretation. Pull downs should be already provided via RN28.
    Most probably ASUS didn't implement any kind of filtering for the USB-port on the back of our router, so why should we bother to do this for the second one?
    A 15 Ohm series resistance is implemented via RN2 on my board, there are even two unused resistors available.
    yes, it was my mistake.. there's no need for a clock generator at this point.
    I still think that a RLC circuit is needed...
    we need to filter the signal... the router is a very noisy environement...
    [ WL-500G | fw: 1.9.2.7-7f ]

  2. #17
    [deleted by poster]
    Last edited by gwl; 01-12-2005 at 00:27.
    [ WL-500G | fw: 1.9.2.7-7f ]

  3. #18
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    Quote Originally Posted by wtzm
    I _guess_ that the second port can be used, but I'm not quite sure if the method works. (Haven't had time to try it.)
    On my rev. 2.4 wl-500g there is a 15k resistor package (RN28) which seems to provide the necessary pull down to GND for the two USB Ports (each one has two differential signals - USB_N and USB_P, of course). Maybe it's enough to connect an USB socket to the two solder points (and +5V & GND of course).
    Attachment 605
    Note: USB1 means USB - Port1 and USB2 means USB - Port 2.
    wtzm, could you please correct the image a bit?
    I believe that USB2 pins should be interchanged ==>
    Code:
    		   -----    ____
    	USB1_N	--I     I--|GND \_
    	USB1_P	--I     I--|   ---
    	USB2_P	--I     I--|  /
    	USB2_N	--I     I--|_/
     		   -----   
                       RN28
    In addition two 15 ohm serial resistors should be used. Then you can enjoy using the second USB port...

    ....
    usb.c: registered new driver usbdevfs
    usb.c: registered new driver hub
    usb-ohci.c: USB OHCI at membase 0xb8004000, IRQ 2
    usb-ohci.c: usb-00:04.0, PCI device 14e4:4715
    usb.c: new USB bus registered, assigned bus number 1
    hub.c: USB hub found
    hub.c: 2 ports detected
    hub.c: new USB device 00:04.0-1, assigned address 2
    hub.c: USB hub found
    hub.c: 4 ports detected
    lp0: using parport0 (polling).
    usb.c: registered new driver usblp
    printer.c: v0.13: USB Printer Device Class driver
    Linux video capture interface: v1.00
    hub.c: new USB device 00:04.0-2, assigned address 3
    usb.c: USB device 3 (vend/prod 0xd7d/0x100) is not claimed by any active driver.
    SCSI subsystem driver Revision: 1.00
    Initializing USB Mass Storage driver...
    usb.c: registered new driver usb-storage
    scsi0 : SCSI emulation for USB Mass Storage devices
    Vendor: Model: USB DISK Rev: 4.08
    Type: Direct-Access ANSI SCSI revision: 02
    Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
    SCSI device sda: 243712 512-byte hdwr sectors (125 MB)
    sda: Write Protect is on
    Partition check:
    /dev/scsi/host0/bus0/target0/lun0: p1 p2
    WARNING: USB Mass Storage data integrity not assured
    USB Mass Storage device found at 3
    USB Mass Storage support registered.
    [admin@(none) root]$

  4. #19
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    Gratulations, Technik!
    I will try this and come back later with my results.

  5. #20
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    Well, it just works.
    I relied on the series resistance of bad solder joints, so the 15 Ohm Resistors weren't necessary *g*. (BTW: I assume these are just there as a safeguard measure in case somebody connects a defective device)
    My dmesg looks quite similar:
    usb.c: registered new driver usbdevfs
    usb.c: registered new driver hub
    PCI: Setting latency timer of device 00:04.0 to 64
    usb-ohci.c: USB OHCI at membase 0xb8004000, IRQ 2
    usb-ohci.c: usb-00:04.0, PCI device 14e4:4715
    usb.c: new USB bus registered, assigned bus number 1
    hub.c: USB hub found
    hub.c: 2 ports detected
    usb.c: registered new driver speedtch
    hub.c: new USB device 00:04.0-1, assigned address 2
    hub.c: new USB device 00:04.0-2, assigned address 3
    hub.c: USB hub found
    hub.c: 4 ports detected
    hub.c: new USB device 00:04.0-2.3, assigned address 4
    usb.c: USB device 4 (vend/prod 0x1019/0xc55) is not claimed by any active driver.
    SCSI subsystem driver Revision: 1.00
    Initializing USB Mass Storage driver...
    usb.c: registered new driver usb-storage
    scsi0 : SCSI emulation for USB Mass Storage devices
    Vendor: IC Model: USB Storage-CFC Rev: 301b
    Type: Direct-Access ANSI SCSI revision: 02
    WARNING: USB Mass Storage data integrity not assured
    USB Mass Storage device found at 4
    USB Mass Storage support registered.

    I used the opportunity to measure the total current consumption in this configuration (speedtouch usb + bus powered hub + cardreader; wireless disabled): ~1.3A.
    The maximum current consumption during startup, without any USB devices, all ethernet ports disconnected: 780mA and 715mA after startup (idle). The same configuration with one of the LAN ports connected: 835mA and 770mA.

    The only thing missing at the moment is a way to (physically) mount another USB connector at the case; Maybe on the front, just above (left) of the PWR Led?

  6. #21
    nice post Technik!

    I've been so busy that I haven't has the time to check this out...
    I remembered to check the forum today, and was glad to find that someone has a solution.

    [Technik], please confirm that this is the correct shematic:
    Code:
                    ___    ____
                 o-|N1 |--|GND \_
    USB2      R1 o-|P1 |--|    __
    pin3  --/\/\/--|P2 |--|   /
    pin2  --/\/\/--|N2 |--|__/
              R2    ---
                   RN28
    pin 1 -- +5v
    pin 4 -- gnd)
    
    
    (R1=R2=15ohm)
    (usb pinout: http://www.interfacebus.com/Design_Connector_USB.html#b )

    Also, did you use external 15ohm resistors, or did you "reuse" the free RN2 15 Ohm resistances on the board?
    where did you get the +5v from? (which part of the pcb?)
    I guess a capacitor next to the +5v input of pin1 would be a nice addon, don't you think?

    regards,
    Last edited by gwl; 01-12-2005 at 01:16.
    [ WL-500G | fw: 1.9.2.7-7f ]

  7. #22
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    You can get power from the pins labeled CE2 (this capacitor is at least on my pcb not populated) next to the onboard USB connector.

  8. #23
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    Quote Originally Posted by gwl
    nice post Technik!

    I've been so busy that I haven't has the time to check this out...
    I remembered to check the forum today, and was glad to find that someone has a solution.

    [Technik], please confirm that this is the correct shematic:
    Code:
                    ___    ____
                 o-|N1 |--|GND \_
    USB2      R1 o-|P1 |--|    __
    pin3  --/\/\/--|P2 |--|   /
    pin2  --/\/\/--|N2 |--|__/
              R2    ---
                   RN28
    pin 1 -- +5v
    pin 4 -- gnd)
    
    
    (R1=R2=15ohm)
    (usb pinout: http://www.interfacebus.com/Design_Connector_USB.html#b )

    Also, did you use external 15ohm resistors, or did you "reuse" the free RN2 15 Ohm resistances on the board?
    where did you get the +5v from? (which part of the pcb?)
    I guess a capacitor next to the +5v input of pin1 would be a nice addon, don't you think?

    regards,
    Thanks!
    I can confirm that your schematic diagram is OK.
    As soldering on small onboard SMD parts is a bit difficult, I prefer using external resistors.
    I am getting 5V from the input connector as marked, not directly but through additional reversible 0.7A fuse (PolySwitch).
    In case you need a high power for external HDD, I would use some additional serial coils on both 5V and GND (taken from the power input connector) and ~1.2A fuse.
    Attached Images Attached Images  

  9. #24
    Hi.

    I've been out for some time and only today I've had the time to check this fantastic discover .

    As I have two USB disk's and with a USB hub I can't put them to work as I want this is the perfect soluction for my case but unfortunately I'm not a expert in electronics so, can someone post some more detailed info about this, with photos and all that so that I can also put a second USB port on my router?

    Thanks,
    Miguel

  10. #25
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    Quote Originally Posted by roque69
    Hi.

    I've been out for some time and only today I've had the time to check this fantastic discover .

    As I have two USB disk's and with a USB hub I can't put them to work as I want this is the perfect soluction for my case but unfortunately I'm not a expert in electronics so, can someone post some more detailed info about this, with photos and all that so that I can also put a second USB port on my router?

    Thanks,
    Miguel
    Please don't try to do it if the info above is not sufficient for you. Onboard parts that you need to solder on are quite small and without some experiences you may permanently damage the router. Also warranty is void as soon as you remove the warranty label covering one screw...

  11. #26
    Quote Originally Posted by Technik
    Please don't try to do it if the info above is not sufficient for you. Onboard parts that you need to solder on are quite small and without some experiences you may permanently damage the router. Also warranty is void as soon as you remove the warranty label covering one screw...
    Thanks for the advice.

    In fact I don't understand the info posted here maybe if it was in portuguese ... Now the solder and warranty are not a problem as I have a friend with solder experience and warranty was gone long time ago.

    Miguel

  12. #27
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    OK then... So this is a (perhaps) more clear "how to".
    Router board version needs to be 2.xx as older boards have a different layout.
    Good luck!
    Attached Images Attached Images     

  13. #28
    Quote Originally Posted by Technik
    OK then... So this is a (perhaps) more clear "how to".
    Router board version needs to be 2.xx as older boards have a different layout.
    Good luck!
    Thanks for the answer. Yes this is a more clear "how to" .

    Just one last question. In the resistors you mention 15 Ohm, the fuse of 1 amp but what about the coil (ferrite slug) resistance ?

    Thanks,
    Miguel

  14. #29
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    Quote Originally Posted by roque69
    Thanks for the answer. Yes this is a more clear "how to" .

    Just one last question. In the resistors you mention 15 Ohm, the fuse of 1 amp but what about the coil (ferrite slug) resistance ?

    Thanks,
    Miguel
    You can use almost any coil type, it's not a critical part - the reason is to eliminate interference. D.C. resistance of the coil should be max. 0.1 Ohm.

  15. #30
    hi guys,
    this is very cool, but, why not just plug an USB hub to the existent port??
    it works perfectly.

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