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17
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Linux Stuff / Kernel / Re: Reliable SD support by disabling highspeed operations
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on: May 29, 2009, 08:24:53 AM
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Yes, it solves the -110 errors while using them, however I am not sure if its ready for use as rootfs, I made a couple of tests, read and write speeds were OK, however once I started putting a bit of a load on it (downloading a torrent file) every program that used the SD started to slow down.
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18
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Linux Stuff / Kernel / Re: Anyone able to upload firmware via USB with their kernel?
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on: May 28, 2009, 08:31:20 PM
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There shouldn't be any problem, I see you have another thread with pretty much the same problem (actually this one seems to be part of it). Please tell us which kernel are you using and if you have the module installed. Try to manually loading the module using modprobe before plugging in. Finally please use lsusb and see if it is detected as it should be.
Hope this helps a little.
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26
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Hardware and U-Boot firmware / Hardware / Re: Unstable USB
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on: May 27, 2009, 10:20:58 PM
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As a bit of an update, I replaced the hub (an unpowered perfect choice brand) for the one that was bundled with rockband for xbox 360 (4 ports, self powered) and so far everything has been working ok, the current uptime is 1 day 3 hours. I suspect the problem is that the sheeva barely has enough power to drive the USB hub, and when a brownout happens the devices restart.
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28
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General Category / Success stories / Re: USB GPIO
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on: May 27, 2009, 09:30:40 AM
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How about something like this:
<http://www.sparkfun.com/commerce/product_info.php?products_id=762>
About $25 US, a PIC controller, 16 GPIO lines, and a USB interface.
You can build your own at the link I posted a couple of post above, and you can get the chips for 7 usd at microchip.com (used to be free, but they started charging for samples), the rest, well, you can salvage an old USB drive or card reader.
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30
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Hardware and U-Boot firmware / Hardware / Re: Unstable USB
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on: May 26, 2009, 09:29:11 PM
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Hi, thanks for the answer. As of my voltage its supposed to be 120, however I am not sure what the exact measure is, I am going to try measuring it later. I don;t know what a variac is, sorry :S As of the USP, I was planning on getting one of these: http://www.apc.com/resource/include/techspec_index.cfm?base_sku=BE350GIts not expensive, and I think APC is a good brand. Anyway, I am not really sure were the problem lies, it simply happens out of a sudden, but I've found that the pattern is related to those events I described earlier. Maybe the problem is like you say, that I am working on the lower end of the limit, because when I turn on the microwave or the lamps, all the lights at my house kind of lose intensity.
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