I would like to try and write a driver for the Parallax Ping. It seems that the device requires a ping, in return the device will listen for the return of the echo. That time, with the speed of sound formula should give you a distance between three centimeters to three meters.
I have went to the Parallax site and looked at their sample code, I must confess a great deal of ignorance looking at it, but it does look like it only uses one port. My question is, can the Domino or Mini work at the speeds that the Parallax Ping operates, which would be in the 2 μs (min), 5 μs typical for pinging?
I am going to assume, and since I do not know what I am doing, I am probably going to be wrong, but I think that this device is going to be used as an analog device. I am using a Domino, and I have the ping in a solderless breadboard. I have never written a driver before, and I look forward to many hours of getting my brain spanked.