diff --git a/Project/applications/smartcities/adc.c b/Project/applications/smartcities/adc.c
index 09ad976..dda4f8a 100644
--- a/Project/applications/smartcities/adc.c
+++ b/Project/applications/smartcities/adc.c
@@ -1,5 +1,9 @@
 /**@file
- * @brief THE GAME
+ * @brief Definitions for the ADC functionality
+ * @author Imanol Barba Sabariego
+ * @date 07/06/2014
+ *
+ * This is where all the methods previously declared in adc.h are defined.
  */
 
 #include "adc.h"
diff --git a/Project/applications/smartcities/include/adc.h b/Project/applications/smartcities/include/adc.h
index b95decf..22d7a9f 100644
--- a/Project/applications/smartcities/include/adc.h
+++ b/Project/applications/smartcities/include/adc.h
@@ -1,3 +1,12 @@
+
+/**@file
+ * @brief Declaration for the ADC functionality
+ * @author Imanol Barba Sabariego
+ * @date 07/06/2014
+ *
+ * This is where all the methods previously declared in adc.h are defined.
+ */
+
 #ifndef ADC_H
 #define ADC_H
 
@@ -7,18 +16,29 @@
 #include "stm32f10x_gpio.h"
 #include "stm32f10x_adc.h"
 
+//! Debug printing definition
+/*! This definition is used for debugging purposes, it is a shorthand for printing debug information */
 #define DBG_ADC(fmt,...)                printf("%c[1;35madc.c:%c[1;00m "fmt,0x1B,0x1B, ##__VA_ARGS__)
 //#define DBG_ADC(fmt,...)                printf("")
 
+//! Minimum battery ADC digital value
 #define ADCbatt_MIN_VALUE		(0)
+//! Maximum battery ADC digital value
 #define ADCbatt_MAX_VALUE		(0xfff)
+//! Maximum battery ADC analog value
 #define ADCbatt_VREF_PLUS		(3300)
+//! Minimum battery ADC analog value 
 #define ADCbatt_VREF_MINUS		(0)
 
+//! Minimum sound ADC digital value
 #define ADCsound_MIN_VALUE		(0)
-#define ADCsound_MAX_VALUE		(0xfff) /* 12-bit adc */
-#define ADCsound_VREF_PLUS		(2800) 	/*  Vref+ is connected with Vdda (3.3v) */
-#define ADCsound_VREF_MINUS		(0) 	/*  Vref- is connected with Vssa (0v) */
+//! Maximum sound ADC digital value
+#define ADCsound_MAX_VALUE		(0xfff)
+//! Maximum sound ADC analog value
+#define ADCsound_VREF_PLUS		(3300)
+//! Minimum sound ADC analog value
+#define ADCsound_VREF_MINUS		(0)
+
 
 #define ADCbatt				ADC1
 #define ADCbatt_RCC			RCC_APB2Periph_ADC1			/* */