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Issue transmitting USB data

Question asked by Daniel Goodwin on May 15, 2015
Latest reply on May 20, 2015 by Daniel Goodwin

Hello,

 

I am currently attempting to create a USB interface for my project that will act as a virtual com port.

 

I am stuck in the enumeration stage of the USB communication.

 

I am receiving the setup packet from the computer, asking for the device descriptor to be sent. I set the address bytes of both of the ODD and EVEN buffer descriptors for the IN on endpoint 0 to be the address of my device descriptor in memory.

 

I get an error message after that (DMAERR). Can anyone please help point me in the correct direction to solving this problem?

 

-Thanks

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