Added DMA support for ADC

include/sta/devices/stm32/adc.hpp

@@ -31,6 +31,14 @@ namespace sta
          */
         void start();
 
+        /**
+		 * @brief Starts conversion of the incoming analog signal in DMA mode.
+		 *
+		 * @param buffer The buffer to write the converted values to.
+		 * @param length The length of the buffer to write the converted values to.
+		 */
+		void startDMA(uint32_t * buffer, size_t length);
+
         /**
          * @brief Polls for the converted analog signal.
          * 

src/devices/stm32/adc.cpp

@@ -17,6 +17,17 @@ namespace sta
         HAL_ADC_Start(handle_);
     }
 
+    void STM32ADC::startDMA(uint32_t * buffer, size_t length)
+	{
+		STA_ASSERT(buffer != nullptr);
+		STA_ASSERT(length != 0);
+		STA_ASSERT(handle_->DMA_Handle != nullptr);
+
+		HAL_StatusTypeDef res = HAL_ADC_Start_DMA(handle_, buffer, length);
+
+		STA_ASSERT(res == HAL_OK);
+	}
+
     void STM32ADC::poll(uint32_t timeout)
     {
         HAL_StatusTypeDef res = HAL_ADC_PollForConversion(handle_, timeout);