Creates directory and file structure for y2020

Based of the 2019 robot and modified to be a boilerplate for a
new robot.

Change-Id: I7e2861a3cfa0b7ca608d5068f731b2796a97fffe
diff --git a/y2020/control_loops/python/drivetrain.py b/y2020/control_loops/python/drivetrain.py
new file mode 100644
index 0000000..54745dd
--- /dev/null
+++ b/y2020/control_loops/python/drivetrain.py
@@ -0,0 +1,42 @@
+#!/usr/bin/python
+
+from frc971.control_loops.python import drivetrain
+import sys
+
+import gflags
+import glog
+
+FLAGS = gflags.FLAGS
+
+gflags.DEFINE_bool('plot', False, 'If true, plot the loop response.')
+
+kDrivetrain = drivetrain.DrivetrainParams(
+    J=1.5,
+    mass=38.5,
+    robot_radius=0.45 / 2.0,
+    wheel_radius=4.0 * 0.0254 / 2.0,
+    G=9.0 / 52.0,
+    q_pos=0.14,
+    q_vel=1.30,
+    efficiency=0.80,
+    has_imu=True,
+    force=True,
+    kf_q_voltage=13.0,
+    controller_poles=[0.82, 0.82],
+    robot_cg_offset=0.0)
+
+
+def main(argv):
+    argv = FLAGS(argv)
+    glog.init()
+
+    if FLAGS.plot:
+        drivetrain.PlotDrivetrainMotions(kDrivetrain)
+    elif len(argv) != 5:
+        print "Expected .h file name and .cc file name"
+    else:
+        # Write the generated constants out to a file.
+        drivetrain.WriteDrivetrain(argv[1:3], argv[3:5], 'y2020', kDrivetrain)
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))