just made it

FlippR-Driver/src/output/DisplayController.cpp

@@ -36,7 +36,7 @@ void DisplayController::cycle_displays()
   {
     for(auto& display : this->displays)
     {
-
+      output_gpio_interface.write_display(display);
     }
   }
 }

FlippR-Driver/src/output/items/Display.h

@@ -26,17 +26,16 @@ public:
   Display(int address, int id);
   virtual ~Display() = default;
 
-  virtual int getID();
-
   virtual void write_score(int score);
   virtual void write_content(std::array<char, DigitCount> content);
 
+  virtual std::vector<char> get_content();
+
 public:
   std::array<char, DigitCount> content;
 
 private:
   int address;
-  int id;
 
   std::string fit_string(std::string &score_string);
 };

FlippR-Driver/src/output/items/Display.hpp

@@ -61,6 +61,12 @@ void Display<DigitCount>::write_content( std::array<char, DigitCount> content)
   this->content = content;
 }
 
+<int DigitCount>
+std::vector<char> Display<DigitCount>::get_content()
+{
+  return std::vector<char>(content, content + DigitCount);
+}
+
 }
 }
 }

FlippR-Driver/src/output/items/IDisplay.h

@@ -8,7 +8,7 @@
 #ifndef _SRC_OUTPUT_IDISPLAY_H_
 #define _SRC_OUTPUT_IDISPLAY_H_
 
-#include <array>
+#include <vector>
 
 namespace flippR_driver
 {
@@ -24,7 +24,7 @@ public:
 	IDisplay();
 	virtual ~IDisplay();
 
-	virtual int getID() = 0;
+	virtual std::vector<char> get_content() = 0;
 };
 
 }

FlippR-Driver/src/utility/OutputGPIOInterface.cpp

@@ -108,6 +108,7 @@ void OutputGPIOInterface::deactivate_output_item(IOutputItem *item)
 
 void OutputGPIOInterface::write_display(IDisplay &display)
 {
+
 }
 
 }

FlippR-Driver/src/utility/OutputGPIOInterface.h

@@ -45,13 +45,12 @@ private:
   void parse_pins_driver_board(json &driver_board_config);
   void parse_pins_sound(json &sound_board_config);
   void parse_pins_display(json &display_board_config);
+
   void initialize_i2c_addresses();
 
   void initialize_pins();
   void initialize_all_pins(u_int8_t pin_base);
 
-  void activate(output::items::IOutputItem outputItem);
-
 private:
   std::mutex output_item_mutex;