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How to change usb description header from 1.1 to 2.0?

 
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j_girl
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How to change usb description header from 1.1 to 2.0?
PostPosted: Tue Aug 15, 2006 3:07 pm     Reply with quote
Hi,

I am trying to modify the header file that came with the USB demo board for the Bulk Demo called usb_desc_scope.h. I want our usb device to be recognized by the PC as USB 2.0 instead of 1.1 which is written in the header file. I read on usb.org what the format was to change to 2.0 and I modified the code, but it still came up as 1.1. How do I make this modification? Question

Thanks,
j_girl
jspencer



Joined: 22 Dec 2003
Posts: 57
Location: Boise, ID USA

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PostPosted: Tue Aug 15, 2006 3:16 pm     Reply with quote
Don't hold me to this because I am not totally sure, but in the usb_desc_xxx.h file there should be some lines that look something like this:

Code:
   
   const char USB_DEVICE_DESC[USB_DESC_DEVICE_LEN] ={
   //starts of with device configuration. only one possible
   USB_DESC_DEVICE_LEN, //the length of this report   ==1
   0x01, //the constant DEVICE (DEVICE 0x01)  ==2
   0x10,0x01, //usb version in bcd


This line is the one that will need to be changed: 0x10,0x01, //usb version in bcd

jspencer
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