Analog ultrasonic sensor class?

[Phoenix Spud]

Has any one implimented a class for an analog ultrasonic sensor to go with the WPILib? We are using the Max Botix EZ1, and therefore cannot use the WPILib class--which is for a digital ultrasonic sensor. We have started to create such a class but we think that the FPGA does not oversample the channel we are using (module 1, port 3). Because we created our code to do this we are getting "fatal errors." Have you found any documentation for the FPGA on the analog module?

Thanks