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 Post subject: AT91RM3400 USB DFU Bootloader
PostPosted: Thu Feb 03, 2005 11:39 am 
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Joined: Thu Feb 03, 2005 11:14 am
Posts: 1
Location: Russia
Hi All!

Sorry for bad english!

Can not make a load on the USB DFU protocol...
Torture to understand.

How Windows on your computer define this device when AT91RM3400 Boot USB DFU program running?
Please write it to me (In my case it define as 'unknown device'.).


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 Post subject:
PostPosted: Tue Feb 08, 2005 9:15 pm 
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Joined: Thu Mar 25, 2004 12:10 am
Posts: 126
Location: Germany
Hi agapov,
i have only german languages based computers. But perhaps the following can help you.

The windows message "unknow device" can mean the following:
1. The device (your) is physically connected (pull up on the UDC + or UDC - line is enabled) but doesn't answer to the standard USB requests. This requests are necessary for device identification and will be sended from the windows host.
If this procedure succeeds you will be ask for a driver. If this fails you will get the message that there is a unknown device connected.

2. The device is recognized but there are no drivers available.

What to do?
1. Check the physical connection. You need at least USB+ (green), USB - (white) and ground (black).
2. There is a tool, called "usbview.exe", which shows you all connectet USB devices (if the described things are succeeded). Use usbview.exe to check if the device is recognized. In this case yoou can read the device and manufactory id's.

Hope this helps,
Edi


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