added todo tasks

firmware/core/Core/Src/main.c

@@ -115,17 +115,21 @@ int main(void)
 
       case MODE_MODULE:
         DMA_Queue_Init(&RxQueue);
+        //TODO: Keyscanning. And transporting signals
         break;
       
       case MODE_MASTER:
-        
-        
-
+        DMA_Queue_Init(&RxQueue);
+        //TODO: Sending to USB and key keyscanning
         break;  
     }
   }
 }
 
+void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {
+  //TODO: Handle recieved message here
+}
+
 void DMA_Queue_Init(DMA_QUEUE* q){
   q->head = 0;
   q->tail = 0;