One of the tricky things about FRC programming is that the "no robot code" indicator is sometimes a misnomer. I would say it is highly likely that your code deployed and ran ... and crashed. I have seen this many times with my students.
What to do? RIO_LOG - is your friend.... You should have a tab at the bottom area in Eclipse which is rio_log. Select it, clear it, and then re-deploy - and watch what happens. You will likely get useful information about the crash.
What if that doesn't work? Use the DEBUGGER - Screensteps will take you through it step by step, but the basic concept is instead of "run-as -> Deploy" you'll instead use "Debug-As -> Deploy" and after a few gyrations in trying to get it running the first time (I remember there being some popup dialogs and seemingly errors the first couple times), then the gdb debugger will run your program and if you're crashing, it'll break right where the crash is occurring. It's very cool.
Good luck and let us know!
bob