From: Curtis O. <cur...@gm...> - 2011-07-19 18:16:33
|
This probably falls in the category of a dumb question, but I haven't found too much from googling and I guess I'm not a USB expert. I am curious about the capabilities of the Overo USB OTG port and what I can do with it in it's default configuration? I have a tobi board here and when I connect some random device (like a simple usb->serial converter) to the USB-OTG port nothing is detected by the Overo. However, when I connect the USB-OTG port on the Tobi board to my desktop computer (linux) the desktop computer notices a new high speed usb device was just connected but can't identify it (still nothing noticed on the overo side.) I found the "How to - usb" page on the wiki ... this claims that the USB OTG port is configured by default to act as a host ... that means I should be able to plug something in and see it, right? Or not right? Can I only connect things that are externally powered? So how is this setup by default? What sorts of things can I expect to be able to do with the USB OTG port in the default configuration? The designers must have had some sort of usage cases in mind if they set it up a particular way? Thanks, Curt. -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org |
From: William P. S. I. <bil...@xp...> - 2011-07-19 18:39:12
|
Hi Curtis; I haven't been to the wiki in a while so I'm not sure if it is still there. However the standard way of connecting devices to the OTG port is by connecting a hub to the port using a mini-A to mini-B cable. Available from Digikey or Gumstix. I can get you the digikey catalog number. Basically most devices like keyboards and mice are USB-1 devices. The OTG port is USB-2 only. So you need the hub as a translator. There used to be a bunch of information on the wiki about this, but it may have been removed. If you are still stuck, I can recommend some USB hubs for you . Good luck; Bill "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell From: Curtis Olson [mailto:cur...@gm...] Sent: Tuesday, July 19, 2011 2:16 PM To: gum...@li... Subject: [Gumstix-users] Capabilities of USB OTG port This probably falls in the category of a dumb question, but I haven't found too much from googling and I guess I'm not a USB expert. I am curious about the capabilities of the Overo USB OTG port and what I can do with it in it's default configuration? I have a tobi board here and when I connect some random device (like a simple usb->serial converter) to the USB-OTG port nothing is detected by the Overo. However, when I connect the USB-OTG port on the Tobi board to my desktop computer (linux) the desktop computer notices a new high speed usb device was just connected but can't identify it (still nothing noticed on the overo side.) I found the "How to - usb" page on the wiki ... this claims that the USB OTG port is configured by default to act as a host ... that means I should be able to plug something in and see it, right? Or not right? Can I only connect things that are externally powered? So how is this setup by default? What sorts of things can I expect to be able to do with the USB OTG port in the default configuration? The designers must have had some sort of usage cases in mind if they set it up a particular way? Thanks, Curt. -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org |
From: Curtis O. <cur...@gm...> - 2011-07-20 16:03:03
|
On Tue, Jul 19, 2011 at 1:38 PM, William Pretty Security Inc < bil...@xp...> wrote: > I haven’t been to the wiki in a while so I’m not sure if it is still > there. > > However the standard way of connecting devices to the OTG port is by > connecting**** > > a hub to the port using a mini-A to mini-B cable. Available from Digikey or > Gumstix.**** > > I can get you the digikey catalog number.**** > > ** ** > > Basically most devices like keyboards and mice are USB-1 devices. The OTG > port is USB-2 only.**** > > So you need the hub as a translator. There used to be a bunch of > information on the wiki**** > > about this, but it may have been removed. If you are still stuck, I can > recommend some USB**** > > hubs for you … > Hi Bill, thanks for the quick reply. I did a google search for "site: wiki.gumstix.org usb" and didn't turn up a lot of information, at least not on the first two pages of results. The USB link on the main wiki page links to a howto for running a TCP/IP stack on top of the USB-OTG port -- I guess I'll file that away for future interest I could see that being a handy option down the road. Maybe this is just one of those basic questions that once you figure it out the lay of the land, you understand what's going on so there's no need to document. :-) The "usb hub" wiki page links to a non-existent dynexproducts.com url ... Does the usb hub need to provide it's own 5v power source? I plugged in a usb hub I have here into my tobi board, but the little red led on my hub never comes on so I'm guessing the overo doesn't provide power to the USB OTG port? Thanks, Curt. -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org |
From: Steve M. <mo...@sm...> - 2011-07-20 17:02:50
|
On Jul 20, 2011, at 11:02 AM, Curtis Olson wrote: > On Tue, Jul 19, 2011 at 1:38 PM, William Pretty Security Inc <bil...@xp...> wrote: > I haven’t been to the wiki in a while so I’m not sure if it is still there. > > However the standard way of connecting devices to the OTG port is by connecting > > a hub to the port using a mini-A to mini-B cable. Available from Digikey or Gumstix. > > I can get you the digikey catalog number. > > > > Basically most devices like keyboards and mice are USB-1 devices. The OTG port is USB-2 only. > > So you need the hub as a translator. There used to be a bunch of information on the wiki > > about this, but it may have been removed. If you are still stuck, I can recommend some USB > > hubs for you … > > > Hi Bill, thanks for the quick reply. I did a google search for "site:wiki.gumstix.org usb" and didn't turn up a lot of information, at least not on the first two pages of results. The USB link on the main wiki page links to a howto for running a TCP/IP stack on top of the USB-OTG port -- I guess I'll file that away for future interest I could see that being a handy option down the road. Maybe this is just one of those basic questions that once you figure it out the lay of the land, you understand what's going on so there's no need to document. :-) > I looked into this while back as well. The issue is that the chip uses a different backend interface when running in OHCI mode. That interface is evidently not in the kernel driver, so it doesn't work. I imagine it could be made to work, but who would want to do that! :) > The "usb hub" wiki page links to a non-existent dynexproducts.com url ... > > Does the usb hub need to provide it's own 5v power source? I plugged in a usb hub I have here into my tobi board, but the little red led on my hub never comes on so I'm guessing the overo doesn't provide power to the USB OTG port? > > Thanks, > > Curt. > -- > Curtis Olson: > http://www.atiak.com - http://aem.umn.edu/~uav/ > http://www.flightgear.org - http://gallinazo.flightgear.org > > ------------------------------------------------------------------------------ > 10 Tips for Better Web Security > Learn 10 ways to better secure your business today. Topics covered include: > Web security, SSL, hacker attacks & Denial of Service (DoS), private keys, > security Microsoft Exchange, secure Instant Messaging, and much more. > http://www.accelacomm.com/jaw/sfnl/114/51426210/_______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users -- Steve Modica CTO - Small Tree Communications www.small-tree.com phone: 651-209-6509 ext 301 mobile: 651-261-3201 |
From: William P. S. I. <bil...@xp...> - 2011-07-20 18:27:43
|
Hi Steve; If you want one stop shopping, try these guys: https://specialcomp.com/gumstix/overo.htm If you want to do-it-yourself, the Digikey catalog number for the cable you need is: H2956-ND. They have next day delivery. As for the hub, I use a Belkin F5U700-blk which is a 7 port hub, or the F5U403-blk which is a 4 port hub. I had some problems recently when I connected a high power WiFi adapter to the 7 port hub. So depending on you needs, I would go with the 4 port version . Good luck J Bill "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell From: Steve Modica [mailto:mo...@sm...] Sent: Wednesday, July 20, 2011 1:03 PM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Capabilities of USB OTG port On Jul 20, 2011, at 11:02 AM, Curtis Olson wrote: ------------ snip --------------- |
From: James <ang...@gm...> - 2011-07-21 09:30:02
|
Hi, Can the OTG port be configured to act as a host when running and act as a mass storage device that allows you to read/write to the SDcard when put into a desktop? Thanks. James On Thu, Jul 21, 2011 at 2:26 AM, William Pretty Security Inc <bil...@xp...> wrote: > Hi Steve; > > > > If you want one stop shopping, try these guys: > https://specialcomp.com/gumstix/overo.htm > > > > If you want to do-it-yourself, the Digikey catalog number for the cable you > need is: H2956-ND. > > They have next day delivery. > > > > As for the hub, I use a Belkin F5U700-blk which is a 7 port hub, or the > F5U403-blk which is a 4 port hub. > > I had some problems recently when I connected a high power WiFi adapter to > the 7 port hub. > > So depending on you needs, I would go with the 4 port version … > > > > Good luck J > > > > Bill > > > > "People sleep peaceably in their beds at night only because rough men > > stand ready to do violence on their behalf." - George Orwell > > > > From: Steve Modica [mailto:mo...@sm...] > Sent: Wednesday, July 20, 2011 1:03 PM > To: General mailing list for gumstix users. > Subject: Re: [Gumstix-users] Capabilities of USB OTG port > > > > > > On Jul 20, 2011, at 11:02 AM, Curtis Olson wrote: > > ------------ snip --------------- > > ------------------------------------------------------------------------------ > 10 Tips for Better Web Security > Learn 10 ways to better secure your business today. Topics covered include: > Web security, SSL, hacker attacks & Denial of Service (DoS), private keys, > security Microsoft Exchange, secure Instant Messaging, and much more. > http://www.accelacomm.com/jaw/sfnl/114/51426210/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > -- Regards, James |
From: Victhor <vic...@gm...> - 2011-07-21 12:55:48
|
I have successfully implemented this, but I have no idea on how to switch automatically. You need to compile a kernel with the USB Gadget stack and the Gadget Zero and Mass Storage Gadget drivers enabled as modules, check the musb_hdrc driver is configured to support OTG mode. Remember to select the correct controller driver in the gadget stack configuration, you want "Inventra MUSB HDRC Controller", not "OMAP USB Controller". Operation is as follows, at least on my system: modprobe g_zero - puts port into host mode modprobe g_mass_storage file=<path block device> - puts port into device mode, mass storage mode. The block device MUST NOT BE YOUR ROOT PARTITION!!! You need to modprobe -r to unload the current module before switching to another, otherwise the new module will fail to load. Also, for some strange reason, my USB OTG port only worked after a cold boot. Rebooting the system caused the port to stop working until a cold boot was performed. The Host port was unaffected. > Hi, > > Can the OTG port be configured to act as a host when running and act > as a mass storage device that allows you to read/write to the SDcard > when put into a desktop? > > Thanks. > > James > > On Thu, Jul 21, 2011 at 2:26 AM, William Pretty Security Inc > <bil...@xp...> wrote: > > Hi Steve; > > > > > > > > If you want one stop shopping, try these guys: > > https://specialcomp.com/gumstix/overo.htm > > > > > > > > If you want to do-it-yourself, the Digikey catalog number for the cable you > > need is: H2956-ND. > > > > They have next day delivery. > > > > > > > > As for the hub, I use a Belkin F5U700-blk which is a 7 port hub, or the > > F5U403-blk which is a 4 port hub. > > > > I had some problems recently when I connected a high power WiFi adapter to > > the 7 port hub. > > > > So depending on you needs, I would go with the 4 port version … > > > > > > > > Good luck J > > > > > > > > Bill > > > > > > > > "People sleep peaceably in their beds at night only because rough men > > > > stand ready to do violence on their behalf." - George Orwell > > > > > > > > From: Steve Modica [mailto:mo...@sm...] > > Sent: Wednesday, July 20, 2011 1:03 PM > > To: General mailing list for gumstix users. > > Subject: Re: [Gumstix-users] Capabilities of USB OTG port > > > > > > > > > > > > On Jul 20, 2011, at 11:02 AM, Curtis Olson wrote: > > > > ------------ snip --------------- > > > > ------------------------------------------------------------------------------ > > 10 Tips for Better Web Security > > Learn 10 ways to better secure your business today. Topics covered include: > > Web security, SSL, hacker attacks & Denial of Service (DoS), private keys, > > security Microsoft Exchange, secure Instant Messaging, and much more. > > http://www.accelacomm.com/jaw/sfnl/114/51426210/ > > _______________________________________________ > > gumstix-users mailing list > > gum...@li... > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > |
From: Francesco M. <fra...@mo...> - 2011-07-21 10:01:16
|
2011/7/19 William Pretty Security Inc <bil...@xp...>: > > Basically most devices like keyboards and mice are USB-1 devices. The OTG > port is USB-2 only. > > So you need the hub as a translator. There used to be a bunch of information > on the wiki This isn't true. The OTG port is USB2 but can handle USB1 devices without hubs, in USB terms it's a USB2 port capable of working in HS (High Speed, 480Mbps), FS (Full Speed, 12Mbps) and LS (Low Speed, don't remeber the value) mode. The other USB port instead is USB2 HS **only**, so you need an hub to connect USB1 devices. Regards -- Francesco Marletta Development Manager Mobile: +39.3317332107 Email: fra...@mo... |
From: William P. S. I. <bil...@xp...> - 2011-07-21 14:24:20
|
According to the Old Wiki, you could not hook USB 1 devices to the OTG port ... That's why they suggested the hub ... Can somebody from Gumstix confirm this ? Has the spec changed ?? "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell -----Original Message----- From: Francesco Marletta [mailto:fra...@mo...] Sent: Thursday, July 21, 2011 6:01 AM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Capabilities of USB OTG port 2011/7/19 William Pretty Security Inc <bil...@xp...>: > > Basically most devices like keyboards and mice are USB-1 devices. The OTG > port is USB-2 only. > > So you need the hub as a translator. There used to be a bunch of information > on the wiki This isn't true. The OTG port is USB2 but can handle USB1 devices without hubs, in USB terms it's a USB2 port capable of working in HS (High Speed, 480Mbps), FS (Full Speed, 12Mbps) and LS (Low Speed, don't remeber the value) mode. The other USB port instead is USB2 HS **only**, so you need an hub to connect USB1 devices. Regards -- Francesco Marletta Development Manager Mobile: +39.3317332107 Email: fra...@mo... ---------------------------------------------------------------------------- -- 5 Ways to Improve & Secure Unified Communications Unified Communications promises greater efficiencies for business. UC can improve internal communications as well as offer faster, more efficient ways to interact with customers and streamline customer service. Learn more! http://www.accelacomm.com/jaw/sfnl/114/51426253/ _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users ----- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1390 / Virus Database: 1518/3776 - Release Date: 07/20/11 |
From: Curtis O. <cur...@gm...> - 2011-07-21 15:03:24
|
I've heard a bit of conflicting information here. Now I'm more confused than when I started. :-) Let me try asking a different way... - I have a Tobi board. - I have a simple usb -> serial converter (pl2303) - I have a Targus 4-port USB hub (with a little red led on it.) When I plug the usb->serial converter directly into the usb "HOST" port it doesn't seem to be detected. When I plug the 4-port hub into the USB-HOST port, the hub is detected and the hub's little red LED is illuminated. When I plug the usb->serial converter into the hub, then it is detected. Life seems relatively good, except I can't plug the device in directly, it only seems to work with the hub in the middle. - I have a USB A -> Mini B converter. When I plug my usb->serial converter into the USB-OTG host (via my A to mini-B converter) the pl2303 serial converter device isn't detected (just like when I plugged it directly into the HOST port.) When I plug my 4-port hub into the USB-OTG port it isn't auto detected, but when I reboot it seems to be detected (I see entries in "dmesg" about detecting a hub.) *HOWEVER* the little red LED on the hub is not illuminated. When I plug my usb->serial converter into the HUB which is plugged into the USB-OTG port, it is *not* detected. ----------------------------------------- So to summarize my observations: I can get my device to work in the USB-HOST port *iff* I use a 4-port hub in between (and the hub's led illuminates when connected to the "HOST" port.) I cannot get my device to work in the USB-OTG port -- neither with or without a 4-port hub in between. In addition the LED on the 4-port hub does not illuminate when connected to the OTG port, even though it appears (dmesg) that the hub is being detected. The plug-n-play USB stuff does not appear to be reliable (?) sometimes it seems like I need to do a reboot before devices are detected. ------------------------------------------- My questions are then: Is this expected behavior? What am I missing with the USB-OTG port that I cannot get it to work on my Tobi? Does the HUB need separate 5v power that OTG port is not providing? Is it something else? Is this just an extra appendage on the Tobi that nobody uses and nobody knows what it's for??? Thanks! Curt. On Thu, Jul 21, 2011 at 9:23 AM, William Pretty Security Inc < bil...@xp...> wrote: > According to the Old Wiki, you could not hook USB 1 devices to the OTG port > ... > That's why they suggested the hub ... > > Can somebody from Gumstix confirm this ? Has the spec changed ?? > > > "People sleep peaceably in their beds at night only because rough men > stand ready to do violence on their behalf." - George Orwell > > > -----Original Message----- > From: Francesco Marletta [mailto:fra...@mo...] > Sent: Thursday, July 21, 2011 6:01 AM > To: General mailing list for gumstix users. > Subject: Re: [Gumstix-users] Capabilities of USB OTG port > > 2011/7/19 William Pretty Security Inc <bil...@xp...>: > > > > Basically most devices like keyboards and mice are USB-1 devices. The OTG > > port is USB-2 only. > > > > So you need the hub as a translator. There used to be a bunch of > information > > on the wiki > > This isn't true. The OTG port is USB2 but can handle USB1 devices > without hubs, in USB terms it's a USB2 port capable of working in HS > (High Speed, 480Mbps), FS (Full Speed, 12Mbps) and LS (Low Speed, > don't remeber the value) mode. > > The other USB port instead is USB2 HS **only**, so you need an hub to > connect USB1 devices. > > Regards > > > -- > Francesco Marletta > Development Manager > > Mobile: +39.3317332107 > Email: fra...@mo... > > > ---------------------------------------------------------------------------- > -- > 5 Ways to Improve & Secure Unified Communications > Unified Communications promises greater efficiencies for business. UC can > improve internal communications as well as offer faster, more efficient > ways > to interact with customers and streamline customer service. Learn more! > http://www.accelacomm.com/jaw/sfnl/114/51426253/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1390 / Virus Database: 1518/3776 - Release Date: 07/20/11 > > > > ------------------------------------------------------------------------------ > 5 Ways to Improve & Secure Unified Communications > Unified Communications promises greater efficiencies for business. UC can > improve internal communications as well as offer faster, more efficient > ways > to interact with customers and streamline customer service. Learn more! > http://www.accelacomm.com/jaw/sfnl/114/51426253/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org |
From: William P. S. I. <bil...@xp...> - 2011-07-21 15:30:02
|
OK; Here is what I think is happening: You are using the wrong mini-USB cable L That confused me at first . You need the mini-A to mini-B cable I gave the part number for. This is a "special" cable that tells the OTG port to switch modes. The hubs I suggested have mini-USB input ports on them. That is how you connect keyboards and what not to the Overo (Per the WiKI). The hub should have EXTERNAL power. (per the WiKI) As far as I know you should be able to just connect your USB-A to Mini-B cable from the Tobi Console connector to your PC and it should just work. Windows and Linux will install a 'virtual' serial port. Linux will call it "TTYx" or something. It depends on you flavor of Linux. My windows Xp system wanted a special driver. I can tell you where to down load it . If the Tobi isn't detected by the Operating system, just unplug the USB connector and plug it in again. You realize that you need the "Desktop Image" to use the keyboard, mouse, etc connected to the hub. The Overo ships with a "Console" image. Which uses the Console USB port on the Overo. Hope this helps . Bill "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell From: Curtis Olson [mailto:cur...@gm...] Sent: Thursday, July 21, 2011 11:03 AM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Capabilities of USB OTG port I've heard a bit of conflicting information here. Now I'm more confused than when I started. :-) Let me try asking a different way... * I have a Tobi board. * I have a simple usb -> serial converter (pl2303) * I have a Targus 4-port USB hub (with a little red led on it.) When I plug the usb->serial converter directly into the usb "HOST" port it doesn't seem to be detected. When I plug the 4-port hub into the USB-HOST port, the hub is detected and the hub's little red LED is illuminated. When I plug the usb->serial converter into the hub, then it is detected. Life seems relatively good, except I can't plug the device in directly, it only seems to work with the hub in the middle. * I have a USB A -> Mini B converter. When I plug my usb->serial converter into the USB-OTG host (via my A to mini-B converter) the pl2303 serial converter device isn't detected (just like when I plugged it directly into the HOST port.) When I plug my 4-port hub into the USB-OTG port it isn't auto detected, but when I reboot it seems to be detected (I see entries in "dmesg" about detecting a hub.) *HOWEVER* the little red LED on the hub is not illuminated. When I plug my usb->serial converter into the HUB which is plugged into the USB-OTG port, it is *not* detected. ----------------------------------------- So to summarize my observations: I can get my device to work in the USB-HOST port *iff* I use a 4-port hub in between (and the hub's led illuminates when connected to the "HOST" port.) I cannot get my device to work in the USB-OTG port -- neither with or without a 4-port hub in between. In addition the LED on the 4-port hub does not illuminate when connected to the OTG port, even though it appears (dmesg) that the hub is being detected. The plug-n-play USB stuff does not appear to be reliable (?) sometimes it seems like I need to do a reboot before devices are detected. ------------------------------------------- My questions are then: Is this expected behavior? What am I missing with the USB-OTG port that I cannot get it to work on my Tobi? Does the HUB need separate 5v power that OTG port is not providing? Is it something else? Is this just an extra appendage on the Tobi that nobody uses and nobody knows what it's for??? Thanks! Curt. On Thu, Jul 21, 2011 at 9:23 AM, William Pretty Security Inc <bil...@xp...> wrote: According to the Old Wiki, you could not hook USB 1 devices to the OTG port ... That's why they suggested the hub ... Can somebody from Gumstix confirm this ? Has the spec changed ?? "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell -----Original Message----- From: Francesco Marletta [mailto:fra...@mo...] Sent: Thursday, July 21, 2011 6:01 AM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Capabilities of USB OTG port 2011/7/19 William Pretty Security Inc <bil...@xp...>: > > Basically most devices like keyboards and mice are USB-1 devices. The OTG > port is USB-2 only. > > So you need the hub as a translator. There used to be a bunch of information > on the wiki This isn't true. The OTG port is USB2 but can handle USB1 devices without hubs, in USB terms it's a USB2 port capable of working in HS (High Speed, 480Mbps), FS (Full Speed, 12Mbps) and LS (Low Speed, don't remeber the value) mode. The other USB port instead is USB2 HS **only**, so you need an hub to connect USB1 devices. Regards -- Francesco Marletta Development Manager Mobile: +39.3317332107 <tel:%2B39.3317332107> Email: fra...@mo... ---------------------------------------------------------------------------- -- 5 Ways to Improve & Secure Unified Communications Unified Communications promises greater efficiencies for business. UC can improve internal communications as well as offer faster, more efficient ways to interact with customers and streamline customer service. Learn more! http://www.accelacomm.com/jaw/sfnl/114/51426253/ _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users ----- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1390 / Virus Database: 1518/3776 - Release Date: 07/20/11 ---------------------------------------------------------------------------- -- 5 Ways to Improve & Secure Unified Communications Unified Communications promises greater efficiencies for business. UC can improve internal communications as well as offer faster, more efficient ways to interact with customers and streamline customer service. Learn more! http://www.accelacomm.com/jaw/sfnl/114/51426253/ _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org _____ No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1390 / Virus Database: 1518/3778 - Release Date: 07/21/11 |
From: Curtis O. <cur...@gm...> - 2011-07-21 15:42:01
|
Hi Bill, On Thu, Jul 21, 2011 at 10:29 AM, William Pretty Security Inc < bil...@xp...> wrote: > OK;**** > > ** ** > > Here is what I think is happening:**** > > ** ** > > You are using the wrong mini-USB cable L That confused me at first …**** > > You need the mini-A to mini-B cable I gave the part number for. > I missed that bit of information. What was the part number you are referencing? Is mini-A and mini-B plug compatible? > **** > > This is a “special” cable that tells the OTG port to switch modes. The hubs > I suggested have mini-USB input ports on them. > I guess I didn't see that either, what hubs are suggested? The hub suggested on the wiki is a broken link. > That is how you connect keyboards and what not to the Overo (Per the WiKI). > The hub should have EXTERNAL power. (per the WiKI) > I thought I did a pretty extensive search for USB on the wiki, what are the wiki links that explain all this? I've happily had keyboard and mouse connected via my 4-port hub through the USB-HOST port. > **** > > As far as I know you should be able to just connect your USB-A to Mini-B > cable from the Tobi Console connector to your PC > > and it should just work. Windows and Linux will install a ‘virtual’ serial > port. Linux will call it “TTYx” or something. It depends on you**** > > flavor of Linux. My windows Xp system wanted a special driver. I can tell > you where to down load it …**** > > If the Tobi isn’t detected by the Operating system, just unplug the USB > connector and plug it in again. > Yup, the console usb port works fine ... I've been using that all along. The tobi has a built in serial->usb converter to expose ttyS2 which is a nice convenience feature. > **** > > You realize that you need the “Desktop Image” to use the keyboard, mouse, > etc connected to the hub. The Overo ships > > with a “Console” image. Which uses the Console USB port on the Overo. > I'm using a console image now ... this system will run headless ... but I should be able to at least detect that devices are connected and disconnected, right? I'm trying to keep this simple and get down to basics. What can or should the port be able to do. So far I have been unable to see any devices connected to it. Where on the wiki is this documented? I've looked (I thought pretty carefully) and have completely missed anything that talks about this. Thanks, Curt. -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org |
From: William P. S. I. <bil...@xp...> - 2011-07-21 16:08:28
|
I'm SO sorry Curtis; I think I must have confused you with someone else L Ok. Here is the info I sent them . USB Hubs that work for me: Belkin F5U700-blk - 7 port hub Belkin F5U403-blk - 4 port hub The 7 port hub had trouble powering high power devices (Alpha WiFi adapter). Mini-A to Mini-B cable: Digikey Part#: H2956-ND There are also a number of kits available from: http://www.specialcomp.com/ Sorry for the confusion, I hope this helps . Bill "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell From: Curtis Olson [mailto:cur...@gm...] Sent: Thursday, July 21, 2011 11:42 AM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Capabilities of USB OTG port Hi Bill, On Thu, Jul 21, 2011 at 10:29 AM, William Pretty Security Inc <bil...@xp...> wrote: OK; Here is what I think is happening: You are using the wrong mini-USB cable L That confused me at first . You need the mini-A to mini-B cable I gave the part number for. I missed that bit of information. What was the part number you are referencing? Is mini-A and mini-B plug compatible? This is a "special" cable that tells the OTG port to switch modes. The hubs I suggested have mini-USB input ports on them. I guess I didn't see that either, what hubs are suggested? The hub suggested on the wiki is a broken link. That is how you connect keyboards and what not to the Overo (Per the WiKI). The hub should have EXTERNAL power. (per the WiKI) I thought I did a pretty extensive search for USB on the wiki, what are the wiki links that explain all this? I've happily had keyboard and mouse connected via my 4-port hub through the USB-HOST port. As far as I know you should be able to just connect your USB-A to Mini-B cable from the Tobi Console connector to your PC and it should just work. Windows and Linux will install a 'virtual' serial port. Linux will call it "TTYx" or something. It depends on you flavor of Linux. My windows Xp system wanted a special driver. I can tell you where to down load it . If the Tobi isn't detected by the Operating system, just unplug the USB connector and plug it in again. Yup, the console usb port works fine ... I've been using that all along. The tobi has a built in serial->usb converter to expose ttyS2 which is a nice convenience feature. You realize that you need the "Desktop Image" to use the keyboard, mouse, etc connected to the hub. The Overo ships with a "Console" image. Which uses the Console USB port on the Overo. I'm using a console image now ... this system will run headless ... but I should be able to at least detect that devices are connected and disconnected, right? I'm trying to keep this simple and get down to basics. What can or should the port be able to do. So far I have been unable to see any devices connected to it. Where on the wiki is this documented? I've looked (I thought pretty carefully) and have completely missed anything that talks about this. Thanks, Curt. -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org |
From: Curtis O. <cur...@gm...> - 2011-07-21 16:29:17
|
On Thu, Jul 21, 2011 at 11:07 AM, William Pretty Security Inc < bil...@xp...> wrote: > I’m SO sorry Curtis;**** > > ** ** > > I think I must have confused you with someone else L**** > > Ok. Here is the info I sent them …**** > > ** ** > > USB Hubs that work for me: Belkin F5U700-blk – 7 port hub > **** > > Belkin > F5U403-blk - 4 port hub**** > > ** ** > > The 7 port hub had trouble powering high power devices (Alpha WiFi > adapter). > Hi Bill, I appreciate your responses, but when I look up these devices I don't see any evidence that they are externally powered. Have you been able to use the USB-*OTG* port on the Tobi without an externally powered HUB? > **** > > ** Mini-A to Mini-B cable: Digikey Part#: H2956-ND > As best as I can see from the digikey web site, this is a straight pass through Mini-B to Mini-B cable. You referenced "per the wiki" several times in your previous email, but I can't find wiki information on any of this. Does anyone have the wiki links that I'm missing? Do they exist? I'd certainly prefer to work carefully through documentation versus flounder around on the email lists chasing down a variety of random and sometimes conflicting/confusing suggestions. Thanks, Curt. -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org |
From: Curtis O. <cur...@gm...> - 2011-07-21 17:10:57
|
On Thu, Jul 21, 2011 at 11:28 AM, Curtis Olson <cur...@gm...> wrote: > > USB Hubs that work for me: Belkin F5U700-blk – 7 port hub >> **** >> >> Belkin >> F5U403-blk - 4 port hub**** >> >> ** ** >> >> The 7 port hub had trouble powering high power devices (Alpha WiFi >> adapter). >> > > Hi Bill, I appreciate your responses, but when I look up these devices I > don't see any evidence that they are externally powered. Have you been able > to use the USB-*OTG* port on the Tobi without an externally powered HUB? > Hi Bill, ok, I do see that in one of the later pictures on the newegg site, there's a port for power and a power supply with the 4-port hub you listed. So as best as I can tell, The both USB-HOST and USB-OTG ports seem to require a hub to get them to do anything (at least with the devices I've tested.) And in addition, the USB-OTG port doesn't provide 5v power so to use the USB-OTG port requires not just a hub, but an externally powered hub. Does this jive with other folks understanding? Thanks, Curt. -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org |
From: William P. S. I. <bil...@xp...> - 2011-07-21 19:17:58
|
Ok; First of all, here is the link to the wiki I was talking about: http://gumstix.org/getting-started.html As for the USB hubs, it may not be obvious from the documentation, but they do come with their own 5V power supply (about 2 Amps!) The type of cable I mentioned with the Digikey part number, is also available from Gumstix. Delivery is just faster from Digikey. However a straight mini-B to mini-B cable WILL NOT WORK. I ordered several before I figured out what was wrong L You need a "Mini-A to Mini-B" cable. They look the same, which sucks, but one of the pins on the connector is grounded. This web site has a good explanation of the various cable types: http://www.accesscomms.com.au/Reference/USB.htm Depending on how handy with a soldering iron you are J I spliced the power connector for the Tobi and the connector for the hub together and connected them both to the same 5V 2 Amp power cube. Works like a charm . good luck; Bill "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell From: Curtis Olson [mailto:cur...@gm...] Sent: Thursday, July 21, 2011 1:10 PM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Capabilities of USB OTG port On Thu, Jul 21, 2011 at 11:28 AM, Curtis Olson <cur...@gm...> wrote: USB Hubs that work for me: Belkin F5U700-blk - 7 port hub Belkin F5U403-blk - 4 port hub The 7 port hub had trouble powering high power devices (Alpha WiFi adapter). Hi Bill, I appreciate your responses, but when I look up these devices I don't see any evidence that they are externally powered. Have you been able to use the USB-*OTG* port on the Tobi without an externally powered HUB? Hi Bill, ok, I do see that in one of the later pictures on the newegg site, there's a port for power and a power supply with the 4-port hub you listed. So as best as I can tell, The both USB-HOST and USB-OTG ports seem to require a hub to get them to do anything (at least with the devices I've tested.) And in addition, the USB-OTG port doesn't provide 5v power so to use the USB-OTG port requires not just a hub, but an externally powered hub. Does this jive with other folks understanding? Thanks, Curt. -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org _____ No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1390 / Virus Database: 1518/3778 - Release Date: 07/21/11 |
From: Curtis O. <cur...@gm...> - 2011-07-21 19:41:12
|
Hi Bill, Thanks for clarifying. That confirms some of what I was observing by trial and error, and answers a few more questions. One more question ... for the mini-A to mini-B adapter (required by the OTG port), which end plugs into the Tobi OTG port? The two plugs (mini-A vs. mini-B) do not appear to be plug-in compatible and my Mini-B plugin fits the Tobi side. Or is the Belkin hub you mentioned designed to plug into a mini-A style connector? Just hoping to maximize the chances that I order the right stuff the first time. :-) Thanks, Curt. On Thu, Jul 21, 2011 at 2:16 PM, William Pretty Security Inc < bil...@xp...> wrote: > Ok;**** > > First of all, here is the link to the wiki I was talking about: > http://gumstix.org/getting-started.html**** > > ** ** > > As for the USB hubs, it may not be obvious from the documentation, but they > do come with their own 5V power supply (about 2 Amps!)**** > > ** ** > > The type of cable I mentioned with the Digikey part number, is also > available from Gumstix. Delivery is just faster from Digikey.**** > > However a straight mini-B to mini-B cable WILL NOT WORK. I ordered several > before I figured out what was wrong L**** > > You need a “Mini-A to Mini-B” cable. They look the same, which sucks, but > one of the pins on the connector is grounded.**** > > ** ** > > This web site has a good explanation of the various cable types: > http://www.accesscomms.com.au/Reference/USB.htm**** > > ** ** > > Depending on how handy with a soldering iron you are J I spliced the power > connector for the Tobi and the connector for the hub**** > > together and connected them both to the same 5V 2 Amp power cube. Works > like a charm …**** > > ** ** > > good luck;**** > > ** ** > > Bill**** > > ** ** > > "People sleep peaceably in their beds at night only because rough men**** > > stand ready to do violence on their behalf." - George Orwell**** > > ** ** > > *From:* Curtis Olson [mailto:cur...@gm...] > *Sent:* Thursday, July 21, 2011 1:10 PM > > *To:* General mailing list for gumstix users. > *Subject:* Re: [Gumstix-users] Capabilities of USB OTG port**** > > ** ** > > On Thu, Jul 21, 2011 at 11:28 AM, Curtis Olson <cur...@gm...> > wrote:**** > > ** ** > > USB Hubs that work for me: Belkin F5U700-blk – 7 port > hub**** > > Belkin > F5U403-blk - 4 port hub**** > > **** > > The 7 port hub had trouble powering high power devices (Alpha WiFi > adapter).**** > > ** ** > > Hi Bill, I appreciate your responses, but when I look up these devices I > don't see any evidence that they are externally powered. Have you been able > to use the USB-*OTG* port on the Tobi without an externally powered HUB?** > ** > > ** ** > > Hi Bill, ok, I do see that in one of the later pictures on the newegg site, > there's a port for power and a power supply with the 4-port hub you listed. > So as best as I can tell,**** > > > The both USB-HOST and USB-OTG ports seem to require a hub to get them to do > anything (at least with the devices I've tested.) And in addition, the > USB-OTG port doesn't provide 5v power so to use the USB-OTG port requires > not just a hub, but an externally powered hub.**** > > ** ** > > Does this jive with other folks understanding?**** > > ** ** > > Thanks,**** > > > Curt.**** > > -- **** > > Curtis Olson:**** > > http://www.atiak.com - http://aem.umn.edu/~uav/**** > > http://www.flightgear.org - http://gallinazo.flightgear.org**** > > ** ** > ------------------------------ > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1390 / Virus Database: 1518/3778 - Release Date: 07/21/11*** > * > > > ------------------------------------------------------------------------------ > 5 Ways to Improve & Secure Unified Communications > Unified Communications promises greater efficiencies for business. UC can > improve internal communications as well as offer faster, more efficient > ways > to interact with customers and streamline customer service. Learn more! > http://www.accelacomm.com/jaw/sfnl/114/51426253/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org |
From: William P. S. I. <bil...@xp...> - 2011-07-21 20:44:21
|
The mini-A connects to the Tobi. The mini-B goes to the hub. Actually I checked my cable from Digikey, and the two ends are shaped differently. The mini-A end is marked with an 'A' so you can't go wrong J That should do it for you. Also there appears to be two web sites on the go: http://Gumstix.org which I believe is the original site. And http://wiki.gumstix.org/ which appears to be the newer one. Hence the confusion with my messages . Later; Bill "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell From: Curtis Olson [mailto:cur...@gm...] Sent: Thursday, July 21, 2011 3:41 PM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Capabilities of USB OTG port Hi Bill, Thanks for clarifying. That confirms some of what I was observing by trial and error, and answers a few more questions. One more question ... for the mini-A to mini-B adapter (required by the OTG port), which end plugs into the Tobi OTG port? The two plugs (mini-A vs. mini-B) do not appear to be plug-in compatible and my Mini-B plugin fits the Tobi side. Or is the Belkin hub you mentioned designed to plug into a mini-A style connector? Just hoping to maximize the chances that I order the right stuff the first time. :-) Thanks, Curt. On Thu, Jul 21, 2011 at 2:16 PM, William Pretty Security Inc <bil...@xp...> wrote: Ok; First of all, here is the link to the wiki I was talking about: http://gumstix.org/getting-started.html As for the USB hubs, it may not be obvious from the documentation, but they do come with their own 5V power supply (about 2 Amps!) The type of cable I mentioned with the Digikey part number, is also available from Gumstix. Delivery is just faster from Digikey. However a straight mini-B to mini-B cable WILL NOT WORK. I ordered several before I figured out what was wrong L You need a "Mini-A to Mini-B" cable. They look the same, which sucks, but one of the pins on the connector is grounded. This web site has a good explanation of the various cable types: http://www.accesscomms.com.au/Reference/USB.htm Depending on how handy with a soldering iron you are J I spliced the power connector for the Tobi and the connector for the hub together and connected them both to the same 5V 2 Amp power cube. Works like a charm . good luck; Bill "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell From: Curtis Olson [mailto:cur...@gm...] Sent: Thursday, July 21, 2011 1:10 PM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Capabilities of USB OTG port On Thu, Jul 21, 2011 at 11:28 AM, Curtis Olson <cur...@gm...> wrote: USB Hubs that work for me: Belkin F5U700-blk - 7 port hub Belkin F5U403-blk - 4 port hub The 7 port hub had trouble powering high power devices (Alpha WiFi adapter). Hi Bill, I appreciate your responses, but when I look up these devices I don't see any evidence that they are externally powered. Have you been able to use the USB-*OTG* port on the Tobi without an externally powered HUB? Hi Bill, ok, I do see that in one of the later pictures on the newegg site, there's a port for power and a power supply with the 4-port hub you listed. So as best as I can tell, The both USB-HOST and USB-OTG ports seem to require a hub to get them to do anything (at least with the devices I've tested.) And in addition, the USB-OTG port doesn't provide 5v power so to use the USB-OTG port requires not just a hub, but an externally powered hub. Does this jive with other folks understanding? Thanks, Curt. -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org _____ No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1390 / Virus Database: 1518/3778 - Release Date: 07/21/11 ---------------------------------------------------------------------------- -- 5 Ways to Improve & Secure Unified Communications Unified Communications promises greater efficiencies for business. UC can improve internal communications as well as offer faster, more efficient ways to interact with customers and streamline customer service. Learn more! http://www.accelacomm.com/jaw/sfnl/114/51426253/ _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org |
From: Victhor <vic...@gm...> - 2011-07-21 14:37:28
|
I have tested all types of devices(high, full and low speed), all of them work fine. The devices tested were a mass storage device(high speed 480 Mb/s), a Bluetooth adapter(full speed 12 Mb/s) and a HID device(low speed 1.5 Mb/s). > According to the Old Wiki, you could not hook USB 1 devices to the OTG port > ... > That's why they suggested the hub ... > > Can somebody from Gumstix confirm this ? Has the spec changed ?? > > > "People sleep peaceably in their beds at night only because rough men > stand ready to do violence on their behalf." - George Orwell > > > -----Original Message----- > From: Francesco Marletta [mailto:fra...@mo...] > Sent: Thursday, July 21, 2011 6:01 AM > To: General mailing list for gumstix users. > Subject: Re: [Gumstix-users] Capabilities of USB OTG port > > 2011/7/19 William Pretty Security Inc <bil...@xp...>: > > > > Basically most devices like keyboards and mice are USB-1 devices. The OTG > > port is USB-2 only. > > > > So you need the hub as a translator. There used to be a bunch of > information > > on the wiki > > This isn't true. The OTG port is USB2 but can handle USB1 devices > without hubs, in USB terms it's a USB2 port capable of working in HS > (High Speed, 480Mbps), FS (Full Speed, 12Mbps) and LS (Low Speed, > don't remeber the value) mode. > > The other USB port instead is USB2 HS **only**, so you need an hub to > connect USB1 devices. > > Regards > > |
From: Victhor <vic...@gm...> - 2011-07-21 15:22:45
|
> I've heard a bit of conflicting information here. Now I'm more > confused than when I started. :-) > > Let me try asking a different way... > > * I have a Tobi board. > * I have a simple usb -> serial converter (pl2303) > * I have a Targus 4-port USB hub (with a little red led on it.) > > > When I plug the usb->serial converter directly into the usb "HOST" > port it doesn't seem to be detected. Perhaps your USB-serial converter is not a high speed device, while the Host port only supports high speed devices. > > When I plug the 4-port hub into the USB-HOST port, the hub is detected > and the hub's little red LED is illuminated. When I plug the > usb->serial converter into the hub, then it is detected. Life seems > relatively good, except I can't plug the device in directly, it only > seems to work with the hub in the middle. > > > * I have a USB A -> Mini B converter. > > > When I plug my usb->serial converter into the USB-OTG host (via my A > to mini-B converter) the pl2303 serial converter device isn't detected > (just like when I plugged it directly into the HOST port.) > > When I plug my 4-port hub into the USB-OTG port it isn't auto > detected, but when I reboot it seems to be detected (I see entries in > "dmesg" about detecting a hub.) *HOWEVER* the little red LED on the > hub is not illuminated. When I plug my usb->serial converter into the > HUB which is plugged into the USB-OTG port, it is *not* detected. > Check dmesg for messages about the device not being enumerated due to excessive current usage or something, if the hub is not externally powered. The USB OTG port will only enumerate devices with a declared current usage of equal or less than 100 mA. > ----------------------------------------- > > > So to summarize my observations: > > I can get my device to work in the USB-HOST port *iff* I use a 4-port > hub in between (and the hub's led illuminates when connected to the > "HOST" port.) > > > I cannot get my device to work in the USB-OTG port -- neither with or > without a 4-port hub in between. In addition the LED on the 4-port > hub does not illuminate when connected to the OTG port, even though it > appears (dmesg) that the hub is being detected. > > > The plug-n-play USB stuff does not appear to be reliable (?) sometimes > it seems like I need to do a reboot before devices are detected. > > > ------------------------------------------- > > > My questions are then: > > > Is this expected behavior? > > > What am I missing with the USB-OTG port that I cannot get it to work > on my Tobi? Does the HUB need separate 5v power that OTG port is not > providing? Is it something else? > > > Is this just an extra appendage on the Tobi that nobody uses and > nobody knows what it's for??? > > > Thanks! > > > Curt. > > > > > On Thu, Jul 21, 2011 at 9:23 AM, William Pretty Security Inc > <bil...@xp...> wrote: > According to the Old Wiki, you could not hook USB 1 devices to > the OTG port > ... > That's why they suggested the hub ... > > Can somebody from Gumstix confirm this ? Has the spec > changed ?? > > > "People sleep peaceably in their beds at night only because > rough men > stand ready to do violence on their behalf." - George Orwell > > > > -----Original Message----- > From: Francesco Marletta [mailto:fra...@mo...] > Sent: Thursday, July 21, 2011 6:01 AM > To: General mailing list for gumstix users. > Subject: Re: [Gumstix-users] Capabilities of USB OTG port > > > > 2011/7/19 William Pretty Security Inc > <bil...@xp...>: > > > > Basically most devices like keyboards and mice are USB-1 > devices. The OTG > > port is USB-2 only. > > > > So you need the hub as a translator. There used to be a > bunch of > information > > on the wiki > > This isn't true. The OTG port is USB2 but can handle USB1 > devices > without hubs, in USB terms it's a USB2 port capable of working > in HS > (High Speed, 480Mbps), FS (Full Speed, 12Mbps) and LS (Low > Speed, > don't remeber the value) mode. > > The other USB port instead is USB2 HS **only**, so you need an > hub to > connect USB1 devices. > > Regards > > > -- > Francesco Marletta > Development Manager > > Mobile: +39.3317332107 > Email: fra...@mo... > > ---------------------------------------------------------------------------- > -- > 5 Ways to Improve & Secure Unified Communications > Unified Communications promises greater efficiencies for > business. UC can > improve internal communications as well as offer faster, more > efficient ways > to interact with customers and streamline customer service. > Learn more! > http://www.accelacomm.com/jaw/sfnl/114/51426253/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1390 / Virus Database: 1518/3776 - Release Date: > 07/20/11 > > > > ------------------------------------------------------------------------------ > 5 Ways to Improve & Secure Unified Communications > Unified Communications promises greater efficiencies for > business. UC can > improve internal communications as well as offer faster, more > efficient ways > to interact with customers and streamline customer service. > Learn more! > http://www.accelacomm.com/jaw/sfnl/114/51426253/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > -- > Curtis Olson: > http://www.atiak.com - http://aem.umn.edu/~uav/ > http://www.flightgear.org - http://gallinazo.flightgear.org > > > ------------------------------------------------------------------------------ > 5 Ways to Improve & Secure Unified Communications > Unified Communications promises greater efficiencies for business. UC can > improve internal communications as well as offer faster, more efficient ways > to interact with customers and streamline customer service. Learn more! > http://www.accelacomm.com/jaw/sfnl/114/51426253/ > _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users |
From: Curtis O. <cur...@gm...> - 2011-07-21 15:34:42
|
On Thu, Jul 21, 2011 at 10:22 AM, Victhor <vic...@gm...> wrote: > Check dmesg for messages about the device not being enumerated due to > excessive current usage or something, if the hub is not externally > powered. The USB OTG port will only enumerate devices with a declared > current usage of equal or less than 100 mA. I have my 4-port hub plugged into the USB OTG port. There are no messages that appear in dmesg when I connect or remove my pl2303 (sewell brand) usb->serial converter device via the hub. Neither is there any messages when I connect or remove the device directly to the USB-OTG port. There are also no messages that show up in dmesg when I disconnect the hub ... (Another tidbit, when I do connect the USB-OTG port to my desktop PC, the desktop PC notices something was connected, but cannot identify it.) Thanks, Curt. -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://gallinazo.flightgear.org |