Index: firmware/App/Drivers/InternalADC.c
===================================================================
diff -u -ra49bd0780d97bb4ce04a9d7b128a6e3c2df044e1 -rebd11d01f826a08806d2f4984bd57e829371b687
--- firmware/App/Drivers/InternalADC.c	(.../InternalADC.c)	(revision a49bd0780d97bb4ce04a9d7b128a6e3c2df044e1)
+++ firmware/App/Drivers/InternalADC.c	(.../InternalADC.c)	(revision ebd11d01f826a08806d2f4984bd57e829371b687)
@@ -18,12 +18,18 @@
 
 #include "InternalADC.h"
 
+/**
+ *  @addtogroup InternalADC
+ *  @{
+ */
+
 // ********** private definitions **********
 
-#define MAX_ADC_CHANNELS                24      // ADC supports up to 24 channels
-#define SIZE_OF_ROLLING_AVG             16      // samples in rolling average calculations
-#define ROLLING_AVG_SHIFT_DIVIDER       4       // rolling average shift divider
+#define MAX_ADC_CHANNELS                24      ///< DG internal ADC supports up to 24 channels.
+#define SIZE_OF_ROLLING_AVG             16      ///< Number of DG internal ADC samples in rolling average calculations for each channel.
+#define ROLLING_AVG_SHIFT_DIVIDER       4       ///< Rolling average shift divider for DG internal ADC readings.
 
+/// ADC channel # to ADC channel ID (enumeration) look-up table.
 const INT_ADC_CHANNEL_T adcChannelNum2ChannelId[ MAX_ADC_CHANNELS ] =
 {
     INT_ADC_RO_PUMP_INLET_PRESSURE,     // 0
@@ -54,13 +60,13 @@
 
 // ********** private data **********
 
-static adcData_t adcRawReadings[ NUM_OF_INT_ADC_CHANNELS ];               // buffer holds latest adc channel readings
-static U32 adcRawReadingsCount = 0;                                       // readings count for raw readings buffer
+static adcData_t adcRawReadings[ NUM_OF_INT_ADC_CHANNELS ];               ///< buffer holds latest adc channel readings.
+static U32 adcRawReadingsCount = 0;                                       ///< readings count for raw readings buffer.
 
-static U16 adcReadings[ NUM_OF_INT_ADC_CHANNELS ][ SIZE_OF_ROLLING_AVG ]; // holds samples for each channel for a rolling average
-static U32 adcReadingsIdx[ NUM_OF_INT_ADC_CHANNELS ];                     // index for next reading in each rolling average array
-static U32 adcReadingsTotals[ NUM_OF_INT_ADC_CHANNELS ];                  // rolling total for each channel - used to calc average
-static U32 adcReadingsAvgs[ NUM_OF_INT_ADC_CHANNELS ];                    // rolling average for each channel
+static U16 adcReadings[ NUM_OF_INT_ADC_CHANNELS ][ SIZE_OF_ROLLING_AVG ]; ///< buffer holds samples for each channel for a rolling average.
+static U32 adcReadingsIdx[ NUM_OF_INT_ADC_CHANNELS ];                     ///< index for next reading in each rolling average buffer.
+static U32 adcReadingsTotals[ NUM_OF_INT_ADC_CHANNELS ];                  ///< rolling sum for each ADC channel - used to calc average.
+static U32 adcReadingsAvgs[ NUM_OF_INT_ADC_CHANNELS ];                    ///< rolling average for each ADC channel.
 
 // ********** private function prototypes **********
 
@@ -181,3 +187,4 @@
     return result;
 }
 
+/**@}*/