Power problem in usb enumeration

[ruchi bansal]

mass storage yellow

I m working on mass storage device enumeration process.I have configuerd the device in self powered.

I am running Windows XP. I can attach my USB device (configured in the USB mass storage class), everything works fine, now device manager i get "USB Mass Storage device" with a yellow exclamation mark. If I double click it, i get in the device status, "This device cannot start. (Code 10)".

When I have searched the details regarding abt this some people are focussing more on maximum power that the device will drain from the bus.

any help

 

[cfant]

500 mA is the maximum current device can draw from USB bus. If you have a power problem, attach your device to USB hub which has it own power supply. If your device works than you have power problem, if not, than you will need USB bus analyzer to see what is going on.