Index: firmware/App/Controllers/DrainPump.c
===================================================================
diff -u -rbbf1e3736be03a4f041ace57e0f95e23caf472dd -rc081112c61e0d85854e8f1e604ac7f1f37c2ec02
--- firmware/App/Controllers/DrainPump.c	(.../DrainPump.c)	(revision bbf1e3736be03a4f041ace57e0f95e23caf472dd)
+++ firmware/App/Controllers/DrainPump.c	(.../DrainPump.c)	(revision c081112c61e0d85854e8f1e604ac7f1f37c2ec02)
@@ -46,19 +46,21 @@
 #define DRP_SPEED_ADC_TO_RPM_FACTOR            12.94               ///< conversion factor from ADC counts to RPM for Drain pump
 #define DRP_SPEED_RPM_TO_ADC_FACTOR            ( 1.0 / DRP_SPEED_ADC_TO_RPM_FACTOR )   ///< conversion factor from RPM to ADC counts for Drain pump
 
+/// Enumeration of drain pump states.
 typedef enum DrainPump_States
 {
-    DRAIN_PUMP_OFF_STATE = 0,
-    DRAIN_PUMP_CONTROL_TO_TARGET_STATE,
-    NUM_OF_DRAIN_PUMP_STATES
+    DRAIN_PUMP_OFF_STATE = 0,                       ///< Drain pump off state.
+    DRAIN_PUMP_CONTROL_TO_TARGET_STATE,             ///< Drain pump control to target state.
+    NUM_OF_DRAIN_PUMP_STATES                        ///< Number of drain pump states.
 } DRAIN_PUMP_STATE_T;
 
+/// Enumeration of drain pump self test states.
 typedef enum DrainPump_Self_Test_States
 {
-    DRAIN_PUMP_SELF_TEST_STATE_START = 0,
-    DRAIN_PUMP_TEST_STATE_IN_PROGRESS,
-    DRAIN_PUMP_TEST_STATE_COMPLETE,
-    NUM_OF_DRAIN_PUMP_SELF_TEST_STATES
+    DRAIN_PUMP_SELF_TEST_STATE_START = 0,           ///< Drain pump self test start state.
+    DRAIN_PUMP_TEST_STATE_IN_PROGRESS,              ///< Drain pump self tests in progress state.
+    DRAIN_PUMP_TEST_STATE_COMPLETE,                 ///< Drain pump self tests completed state.
+    NUM_OF_DRAIN_PUMP_SELF_TEST_STATES              ///< Number of drain pump self test states.
 } DRAIN_PUMP_SELF_TEST_STATE_T;
 
 // pin assignment for pump enable