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doctalk
13 Posts |
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ctacke
877 Posts |
 Posted - 17 Jan 2003 : 17:46:20
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Sure. While CE 3.0 doesn't have built-in support for these devices, CE.NET does. Any of our boards with one or more USB client (downstream) ports (Graphics Master, Bitsy, Bitsy Plus, AGC, Display Master, etc) will work with these little wonders.
Here is a list of devices we have successfully tested here at ADS:
| Manufacturer | Size(s) | | M-Systems | 128MB, 8MB | | Sony | 64MB |
If you have found a device that doesn't work, please e-mail us and let us know the manufacturer and size of the device.
modified Apr 30, 03 (ctacke) - added list of supported devices |
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madav
15 Posts |
Posted - 30 Apr 2003 : 10:16:36
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I tried using the storage devices mentioned above, (Polaroid 64MB USB Flash drive) on a Bitsy + Monochrome + CE.net (build 4.12) configuration. Sadly, the bitsy failed to recognize the USB device, when it was plugged in.
Are there any special .dll's that I need to load to have the Bitsy recoganize the USB device.
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Susan
123 Posts |
Posted - 30 Apr 2003 : 13:25:42
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BitsyPlus, CE.NET image 4.12, ROM 1.77 also does not recognize the Polaroid 64MB USB Flash drive.
I'm assuming that the existence of this device will be manifested similarly to how it is manifested on the PC - it will appear as another icon under My Computer.
The LED on the USB device does flash when it is inserted into the BitsyPlus's port. |
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ctacke
877 Posts |
Posted - 30 Apr 2003 : 13:41:47
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I just checked with a BitsyPlus runing build 4.12 using a 128MB USB Storage device (no idea what brand, it's not marked). Once recognized it will show up in the device root (same level as "Storage Card" or "FlashFX Disk") as "Hard Disk".
The larger the device the longer it takes to show up. The 128MB I'm using takes ~10 seconds to show up. |
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Susan
123 Posts |
Posted - 30 Apr 2003 : 14:26:57
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I've had my Polaroid 64MB USB FlashDrive inserted into the USB port for approximately 11 minutes. I have even 'forced' a refresh of the 'My Computer' screen (as opposed to relying on it to refresh itself after recognizing the USB).
I believe the only way I'll get the "Hard Disk" icon to appear on that screen is to take out my big box of Crayola crayons and start drawing.
This particular USB storage device comes with an option to password protect part of the device. Is this option unique to this device, or is this common among all such devices? Could this option be causing the difficulty?
Would you please provide a list of tried and tested USB storage devices? |
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tempo
26 Posts |
Posted - 30 Apr 2003 : 14:40:09
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I too have tried with two usb flash drives and neither of them work. Please post a list of supported drives.
Thanks
Paul |
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ctacke
877 Posts |
Posted - 30 Apr 2003 : 14:42:13
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I've not seen a device that had the option to protect part of it, which may be the probelm here. I suppose it's possible that your device uses a special driver that CE doesn't support.
After a bit more research I found that the device I'm using is an M-Systems Disk-on-key device. I have also successfully used an M-Systems 8MB Disk-on-key. |
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ctacke
877 Posts |
Posted - 30 Apr 2003 : 14:56:10
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| I've added a table of tested devies above. We'll update this table as we test additional devices. |
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akidder
1519 Posts |
Posted - 09 May 2003 : 18:14:02
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Follow-up
Susan, Madav and Paul have tried different brand "keychain" USB devices and have had success. They may send the non-functioning devices to us for analysis. We suspect that CE may not support the encryption features of some of these products.
If you have a device that's not working, email us details about the device and we'll see how we can best help get your product to market. |
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madav
15 Posts |
Posted - 03 Jun 2003 : 15:42:15
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Though I have my USB storage card working, it acts very flaky. The Bitsy that I use detects the USB drive only if it is there during the inital bootup. And if the USB device is removed and re-insterted again (with the Bitsy device is powered-on), it is detected after an appx 1 min delay during some instances and never detected at others and the device freezes. Thus causing my applications to hang.
I am wondering if this a purely Bitsy problem or if it is a .Net issue as Susan has her Bitsy Plus + .Net detecting the USB storage device every time, though after a long delay.
The other thing that I wanted to bring to ADS's notice is that I read in one of the microsoft user groups that by varying a register value the time taken to recoganize the device could be reduced.
****************************************************************************************
#define CLIENT_REGKEY_SZ
TEXT("Drivers\\USB\\ClientDrivers\\Mass_Storage_Class")
#define RESET_TIMEOUT_SZ TEXT("ResetTimeout")
#define COMMAND_BLOCK_TIMEOUT_SZ TEXT("CommandBlockTimeout")
#define COMMAND_STATUS_TIMEOUT_SZ TEXT("CommandStatusTimeout")
it is dword value. default (if there is no) is 4000 ms. If you think it is too long, please reduce it.
**********************************************************************************
It would be nice if you could throw some light into it
Thank you |
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Patrick
34 Posts |
Posted - 21 Jun 2004 : 10:34:38
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No one has said anything on this for a while, but it has become a concern for us again. Has anyone had any luck with any certain device? We had been using the M-Systems one, but the minute delay in being recognized by the OS is killing us. The JumpDrive TRIO works quickly and nicely, but the removable card will be a problem for our customer.
We just tried the regular Lexar JumpDrive, but the devices are killed after only one visit with a Bitsy+ board, and never seem to work again. (They continue to work on PCs, however)
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akidder
1519 Posts |
Posted - 21 Jun 2004 : 10:54:06
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Thanks for your note, Patrick. We've had success using a number of USB storage devices, but time-to-enumeration has been one of a number of issues that have persisted.
The latest news is that we now know that CE USB driver is the culprit, and has a number of issues that can be fixed (at a price). Generally speaking, there are tradeoffs with the existing driver: it can be optimized for use under a number of different conditions, but it is not a strong, general-purpose driver.
We know that the USB function driver in CE.NET 5.0 has been rewritten and takes care of many of these issues, but release of 5.0 isn't expected till late this year. Feel free to contact us directly if you would like to discuss options for your production orders.
Cheers, Drew |
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gatanui
1 Posts |
Posted - 22 Jun 2005 : 15:25:21
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It's mentioned in Topic 1429, but I could not get a CompUSA-branded USB v1.1 Flash Drive (16MB) to appear in CE .NET ... goofy drivers, I guess.
However, my PNY Attache USB 2.0 Flash Drive (512 MB) appears to work fine. There is a delay on plug-in that will be handled in my application. |
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