Make arm zeroing safer.

Now it forces the elevator to go to a predefined "safe" height
before it zeroes the arm to avoid crashing the fridge.

Change-Id: I8b5197a6a1e3d75372756015026c5ea8d1ddddef
5 files changed
tree: d4e18b16cd0e8d770c6a98f3f43d4654e1e2c65f
  1. aos/
  2. doc/
  3. frc971/
  4. output/
  5. vision/
  6. .clang-format
  7. .gitignore
  8. README.txt