USB bulk with speed higher than 64 KB/s with LM4F

Hi,

I'm new to USB and I'm trying to get more than 64 KB/s (more than 1 packet per frame) using bulk transfer.

I'm using the usb_dev_bulk example to which I already have made some modifications: increased the size read on the PC side and increased BULK_BUFFER_SIZE on the LM4F side.

I currently have 408 kbps of data (64 KB/s - 13 KB/s for the header) and I can see that I'm getting a packet every 1ms (highest speed with full speed).

I noticed that the LM4F is sending an empty packet after every packet in order to finish the transfer. I need to be able to send other packets before this empty packet.

Does anyone have any idea on how to do that?