Hi, I have a Omapl138 board, I am trying to connect a USB to the same. M using windows 7 OS. while I am debugging USB firmware code I can see a the following sequence of Signal transfer.
1. a Reset signal 2. device descriptor request 3. set address request
again the same pattern repeating for 4 times.
can anybody help to find why its not come out of these sequence..?
I should get a device confg request next right..?
Yes I am using a existing stack. And I am getting the sequence like
> reset > Get_Descriptor(Device) > reset > Set_Address > reset .... and again repeating the same pattern.
I have a doubt for the first Get_Descriptor(Device) request my stack sending 18bytes of data. will it cause any problem..??
Thank you.
After first 8 bytes of Device Descriptor Windows host will terminate further reception of IN packets by sending OUT zero length packet, and after this anyways bus will be reset.