Added angle adjust control loop.
diff --git a/frc971/constants.h b/frc971/constants.h
index 187ab6a..be166ac 100644
--- a/frc971/constants.h
+++ b/frc971/constants.h
@@ -1,5 +1,7 @@
 #include <stdint.h>
 
+#include <array>
+
 namespace frc971 {
 namespace constants {
 
@@ -25,6 +27,19 @@
 
 // Returns the speed to move the wrist at when zeroing in rad/sec
 bool wrist_zeroing_speed(double *speed);
+bool angle_adjust_horizontal_hall_effect_start_angle(
+    ::std::array<double, 2> *angle);
+bool angle_adjust_horizontal_hall_effect_stop_angle(
+    ::std::array<double, 2> *angle);
+// These are the soft stops for up and down.
+bool angle_adjust_horizontal_lower_limit(double *angle);
+bool angle_adjust_horizontal_upper_limit(double *angle);
+// These are the hard stops.  Don't use these for anything but testing.
+bool angle_adjust_horizontal_lower_physical_limit(double *angle);
+bool angle_adjust_horizontal_upper_physical_limit(double *angle);
+
+// Returns speed to move the angle adjust when zeroing, in rad/sec
+bool angle_adjust_horizontal_zeroing_speed(double *speed);
 
 // Sets *center to how many pixels off center the vertical line
 // on the camera view is.