Add drivetrain to y2017

Change-Id: I7494fd6c4b242ceb4aba26c9b5ddee064f29f382
diff --git a/y2017/control_loops/drivetrain/drivetrain_base.cc b/y2017/control_loops/drivetrain/drivetrain_base.cc
new file mode 100644
index 0000000..03e180b
--- /dev/null
+++ b/y2017/control_loops/drivetrain/drivetrain_base.cc
@@ -0,0 +1,49 @@
+#include "y2017/control_loops/drivetrain/drivetrain_base.h"
+
+#include "frc971/control_loops/drivetrain/drivetrain_config.h"
+
+#include "frc971/control_loops/state_feedback_loop.h"
+#include "y2017/control_loops/drivetrain/drivetrain_dog_motor_plant.h"
+#include "y2017/control_loops/drivetrain/polydrivetrain_dog_motor_plant.h"
+#include "y2017/control_loops/drivetrain/kalman_drivetrain_motor_plant.h"
+#include "y2017/constants.h"
+
+using ::frc971::control_loops::drivetrain::DrivetrainConfig;
+
+namespace y2017 {
+namespace control_loops {
+namespace drivetrain {
+
+using ::frc971::constants::ShifterHallEffect;
+
+const ShifterHallEffect kThreeStateDriveShifter{0.0, 0.0, 0.0, 0.0, 0.25, 0.75};
+
+const DrivetrainConfig &GetDrivetrainConfig() {
+  static DrivetrainConfig kDrivetrainConfig{
+      ::frc971::control_loops::drivetrain::ShifterType::HALL_EFFECT_SHIFTER,
+      ::frc971::control_loops::drivetrain::LoopType::CLOSED_LOOP,
+
+      ::y2017::control_loops::drivetrain::MakeDrivetrainLoop,
+      ::y2017::control_loops::drivetrain::MakeVelocityDrivetrainLoop,
+      ::y2017::control_loops::drivetrain::MakeKFDrivetrainLoop,
+
+      drivetrain::kDt,
+      drivetrain::kRobotRadius,
+      drivetrain::kWheelRadius,
+      drivetrain::kV,
+
+      drivetrain::kHighGearRatio,
+      drivetrain::kHighGearRatio,
+      kThreeStateDriveShifter,
+      kThreeStateDriveShifter,
+      true,
+      constants::GetValues().down_error,
+      0.25,
+      1.0};
+
+  return kDrivetrainConfig;
+};
+
+}  // namespace drivetrain
+}  // namespace control_loops
+}  // namespace y2017