Added ADC implementation for STM32

include/sta/devices/stm32/adc.hpp

@@ -11,10 +11,26 @@ namespace sta
     class STM32ADC
     {
     public:
-        STM32ADC();
+        /** 
+         * @param handle A handle to a STM32 ADC.
+         */
+        STM32ADC(ADC_HandleTypeDef * handle);
 
+        /**
+         * @brief Starts conversion of the incoming analog signal.
+         */
+        void start();
+
+        /**
+         * @brief 
+         * 
+         * @param timeout 
+         */
+        void poll(uint32_t timeout);
+
+        uint32_t getValue();
     private:
-    	
+    	ADC_HandleTypeDef * handle_;
     };    
 } // namespace sta