diff --git a/inc/adc.h b/inc/adc.h
--- a/inc/adc.h
+++ b/inc/adc.h
@@ -12,6 +12,15 @@
 #include "stm32f3xx_hal.h"
 
 /* USER CODE BEGIN Includes */
+enum _adc_reading_id
+{
+	ADC_CHAN_VIOUT = 0,
+	ADC_CHAN_GAIN_VIOUT = 1,
+	ADC_CHAN_VBAT = 2,
+};
+
+uint16_t get_viout_counts(void);
+uint16_t get_vbat_counts(void);
 
 /* USER CODE END Includes */
 
@@ -19,7 +28,8 @@
 
 /* USER CODE END Private defines */
 
-void MX_ADC1_Init(void);
+void adc_init(void);
+extern ADC_HandleTypeDef hadc1;
 
 /* USER CODE BEGIN Prototypes */