diff --git a/inc/adc.h b/inc/adc.h
--- a/inc/adc.h
+++ b/inc/adc.h
@@ -3,8 +3,12 @@
 
 #include "stm32f0xx_hal.h"
 
-extern ADC_HandleTypeDef hadc;
 
 void adc_init(void); 
+void adc_start(void);
+void adc_stop(void);
+uint8_t adc_get_vbatt(void);
+int16_t adc_get_dietemp(void);
+ADC_HandleTypeDef* adc_gethandle(void);
 
 #endif