Working logger implementation and some fixes for driver code

include/sta/utils/logger.hpp

@@ -21,6 +21,10 @@ namespace sta
          */
         Logger(W25Qxx * flash, uint32_t startSector, uint32_t endSector);
         
+        void findLast();
+
+        bool write(T* data);
+
         /**
          * @brief Write a new data point to the flash chip. 
          * @note If the total capacity of this logger was exceeded, it restarts at the first sector, overwriting its data.
@@ -73,7 +77,7 @@ namespace sta
          */
         T operator[](std::size_t i);
     private:
-        void findLast();
+        bool searchCriterion(uint8_t * buffer);
 
         W25Qxx * flash_;
         uint32_t start_;
@@ -81,6 +85,7 @@ namespace sta
         uint32_t address_;
 
         uint8_t buffer_[W25QXX_PAGE_SIZE];
+        bool flushed_;
         uint32_t ptr_;
     };
 } // namespace sta