USB Flash drive Interface to FPGA

[maheshhkc]

We are doing a project on reading a simple image from USB flash drive onto an FPGA (The development board being XUPV5-LX110T from Digilent). We have USB IP core from Opencores. How do we use that to read the data and store it onto memory on board?

 

[FvM]

You have to do quite a lot, besides implementing USB host and PHY functionality, control of a mass storage device, including the SCSI-2 command layer. It would be a cake-walk to use a SD card memory device instead. A FAT layer has to be implemented in both cases, unless you placing the data in fixed memory blocks.

 

[maheshhkc]

Thank you FvM.
The thing is there is only one data, that is the image, in the pen drive. We have chosen so to simplify the task.

I have understood how the signal flow in USB protocol happens. Using the address of the USB port (like the address of the peripheral) cant I command the USB flash controller inside the pen drive to access and send data?

 

[FvM]

If it's not too late to switch to SDcard (preferably accessed in SPI mode), you should do it. Otherwise calculate one or two weeks of serious work (if you don't find a ready-to-use FPGA implementation of a MSD host).

 

[maheshhkc]

Where can I find it? Any suggestions?

- - - Updated - - -

Its actually an academic project for Engineering. So, synopsis is already submitted. Its difficult to change

 

[mrflibble]

Well, academia is surely used to the concept of requirements changing upon contact with reality.

 

[mrflibble]

Where can I find it? Any suggestions?

Also, just google "sdcard spi verilog" or "sdcard spi vhdl". I'm too lazy to even summarize the relevant hits, it's so easy to find.