update u8g2lib + working display

MilliOhmMeter_FW/src/display_hall.h

@@ -0,0 +1,47 @@
+#pragma once
+
+#include "board.h"
+
+#include "U8g2lib.h"
+
+#include "measure.h"
+#include "connect.h"
+
+
+#define SCREENREFRESH 100
+#define SCREENWIDTH 256
+
+#define FONT8 u8g2_font_helvR08_tf
+#define FONT16 u8g2_font_7x14_tf
+#define FONT24 u8g2_font_freedoomr25_tn //u8g2_font_logisoso24_tf
+
+class U8G2_SSD1322 : public U8G2 {
+  public: 
+    U8G2_SSD1322(const u8g2_cb_t *rotation, uint8_t mosi, uint8_t clk, uint8_t cs, uint8_t dc, uint8_t reset = U8X8_PIN_NONE) : U8G2() {
+      u8g2_Setup_ssd1322_nhd_256x64_f(&u8g2, rotation, u8x8_byte_arduino_hw_spi, u8x8_gpio_and_delay_arduino);
+      SetPin_4Wire_HW_SPI(getU8x8(), mosi, clk, cs, dc, reset);
+    }
+    
+    void SetPin_4Wire_HW_SPI(u8x8_t *u8x8,  uint8_t mosi, uint8_t clk, uint8_t cs, uint8_t dc, uint8_t reset)
+    {
+      u8x8_SetPin(u8x8, U8X8_PIN_CS, cs);
+      u8x8_SetPin(u8x8, U8X8_PIN_DC, dc);  
+      u8x8_SetPin(u8x8, U8X8_PIN_I2C_DATA, mosi); //note the orignina u8x8 callbacks are using I2C_data and I2C_clk 
+      u8x8_SetPin(u8x8, U8X8_PIN_I2C_CLOCK, clk);
+      u8x8_SetPin(u8x8, U8X8_PIN_RESET, reset);
+    }
+};
+
+
+void initDisplayHall(void);
+void handleDisplayHall(void);
+
+void clearDisplay(void);
+
+String showValue(String designator, float value, String unit);
+
+uint16_t getDisplayWidth(void);
+uint16_t getDisplayHeight(void);
+
+U8G2_SSD1322* getDisplay(void);
+