cleanup, refactor

include/LCDDisplay.hpp

@@ -14,6 +14,11 @@ class LCDDisplay {
     std::string _dev;
     char writebuf[LCD_LINES * LCD_COLS + 8];                       // 4x40 chars + 2x4 setcursor commands
     static constexpr bool dualDisp = (LCD_LINES * LCD_COLS > 80);  // is it dual display device or not, evauluated from the size at compile time
+
+    void open();
+    void write(const uint8_t* cmdbuf, uint8_t len);
+    void close();
+
     void writeLines(std::array<std::string, 4> lines);             // do not use
     // we avoid using these, use buffer (even if these are faster for small writes, perhaps a rewrite is in order)
     void writeStr(std::string str);
@@ -22,8 +27,6 @@ class LCDDisplay {
    public:
     LCDDisplay(std::string dev, uint32_t baud = 0010002);  // from termios-baud.h, B115200
     ~LCDDisplay();
-    void open();
-    void close();
 
     void clear();
     void setContrast(uint8_t contrast);
@@ -35,11 +38,10 @@ class LCDDisplay {
     void writeBuf(uint8_t row, uint8_t col, std::string str);
     void clearBuf();
     void flushBuf();
+    char bar(uint8_t char_id, double value);
 
     // returns custom char no. c, small enough to define in header
     constexpr char cc(uint8_t c) { return c % 8; }
-
-    char bar(uint8_t char_id, double value);
 };
 
 #endif