Reading Digital caliper with Arduino

[arvidj]

I guess it doesn't really matter as the interrupt is simply trying to capture the bit stream without any thoughts as to what it means. It will be the responsibility of the program loop to, at its leisure, take the captured bit stream and peal the bits back off the captured stream as flags and nibbles and digits and ... to determine what the information is and format it for human consumption.

As long as the interrupt and the program loop agree on how the bits are put into the captured stream we will be good.