Decapitate bot3 so it only has a drive base

Now that it is the third robot, and has no superstructure, let's check
in the code it is running.

Change-Id: Ief89efae4d4a75d837396e2731b8be4e69f55c4a
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/y2022_bot3/control_loops/drivetrain/drivetrain_base.cc b/y2022_bot3/control_loops/drivetrain/drivetrain_base.cc
index a97e0dd..8fd6d94 100644
--- a/y2022_bot3/control_loops/drivetrain/drivetrain_base.cc
+++ b/y2022_bot3/control_loops/drivetrain/drivetrain_base.cc
@@ -27,7 +27,7 @@
   static constexpr double kImuYaw = 0.0;
   static DrivetrainConfig<double> kDrivetrainConfig{
       ::frc971::control_loops::drivetrain::ShifterType::SIMPLE_SHIFTER,
-      ::frc971::control_loops::drivetrain::LoopType::CLOSED_LOOP,
+      ::frc971::control_loops::drivetrain::LoopType::OPEN_LOOP,
       ::frc971::control_loops::drivetrain::GyroType::SPARTAN_GYRO,
       ::frc971::control_loops::drivetrain::IMUType::IMU_FLIPPED_X,
 
diff --git a/y2022_bot3/control_loops/drivetrain/drivetrain_main.cc b/y2022_bot3/control_loops/drivetrain/drivetrain_main.cc
index fda7119..810e1f3 100644
--- a/y2022_bot3/control_loops/drivetrain/drivetrain_main.cc
+++ b/y2022_bot3/control_loops/drivetrain/drivetrain_main.cc
@@ -19,6 +19,10 @@
           std::make_unique<::frc971::control_loops::drivetrain::DeadReckonEkf>(
               &event_loop,
               ::y2022_bot3::control_loops::drivetrain::GetDrivetrainConfig());
+  std::unique_ptr<DrivetrainLoop> drivetrain = std::make_unique<DrivetrainLoop>(
+      y2022_bot3::control_loops::drivetrain::GetDrivetrainConfig(), &event_loop,
+      localizer.get());
+
   event_loop.Run();
 
   return 0;
diff --git a/y2022_bot3/control_loops/python/drivetrain.py b/y2022_bot3/control_loops/python/drivetrain.py
index 8c5a2f8..638b3f3 100644
--- a/y2022_bot3/control_loops/python/drivetrain.py
+++ b/y2022_bot3/control_loops/python/drivetrain.py
@@ -14,7 +14,7 @@
 
 kDrivetrain = drivetrain.DrivetrainParams(
     J=6.0,
-    mass=58.0,
+    mass=28.0,
     # TODO(austin): Measure radius a bit better.
     robot_radius=0.39,
     wheel_radius=2.5 * 0.0254,