diff --git a/cube/User/Inc/oled.h b/cube/User/Inc/oled.h
index 2583157..b790a13 100644
--- a/cube/User/Inc/oled.h
+++ b/cube/User/Inc/oled.h
@@ -17,6 +17,8 @@
 
 void oledInit(void);
 
+/*
+ * Will be used only internal
 void oled_CLS(void);
 void oled_Set_Pos(unsigned char x,unsigned char y);//Set the coordinate
 void oled_WrDat(unsigned char data);   //Write Data
@@ -26,12 +28,10 @@ void oled_P8x16Str(unsigned char x,unsigned char y,char ch[]);
 
 void oled_PrintBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char bmp[]);
 void oled_Fill(unsigned char dat);
-//void oled_PrintValueC(unsigned char x, unsigned char y,char data);
-//void oled_PrintValueI(unsigned char x, unsigned char y, int data);
-//void oled_PrintValueF(unsigned char x, unsigned char y, float data, unsigned char num);
 void oled_PrintEdge(void);
 void oled_Cursor(unsigned char cursor_column, unsigned char cursor_row);
 void oled_PrintLine(void);
+*/
 
 void oledClear();
 void oledPrint(char msg[]);
diff --git a/cube/User/Src/oled.c b/cube/User/Src/oled.c
index 94e2bd7..0b61b8a 100644
--- a/cube/User/Src/oled.c
+++ b/cube/User/Src/oled.c
@@ -36,7 +36,7 @@ static void __LEDPIN_CS(GPIO_PinState v) {
   HAL_GPIO_WritePin(Display_CS_GPIO_Port, Display_CS_Pin, v);
 }
 
-void oled_WrDat(unsigned char data)   
+static void oled_WrDat(unsigned char data)   
 {
   __LEDPIN_CS(LOW);
   __LEDPIN_DC(HIGH);
@@ -45,7 +45,8 @@ void oled_WrDat(unsigned char data)
 
   __LEDPIN_CS(HIGH);
 }
-void oled_WrCmd(unsigned char cmd) 
+
+static void oled_WrCmd(unsigned char cmd) 
 {
   __LEDPIN_CS(LOW);
   __LEDPIN_DC(LOW);
@@ -54,7 +55,8 @@ void oled_WrCmd(unsigned char cmd)
 
   __LEDPIN_CS(HIGH);
 }
-void oled_Set_Pos(unsigned char x, unsigned char y)
+
+static void oled_Set_Pos(unsigned char x, unsigned char y)
 { 
   oled_WrCmd(0xb0+y);
   oled_WrCmd(((x&0xf0)>>4)|0x10);
@@ -62,7 +64,7 @@ void oled_Set_Pos(unsigned char x, unsigned char y)
 } 
 
 
-void oled_Fill(unsigned char bmp_data)
+static void oled_Fill(unsigned char bmp_data)
 {
   unsigned char y,x;
 
@@ -78,7 +80,7 @@ void oled_Fill(unsigned char bmp_data)
 
 
 
-void oled_CLS(void) 
+static void oled_CLS(void) 
 {
   unsigned char y,x;
   for(y=0;y<8;y++)
@@ -91,21 +93,24 @@ void oled_CLS(void)
   }
 }
 
-void oled_DLY_ms(unsigned int ms)
+static void oled_DLY_ms(unsigned int ms)
 {                         
   uint32_t start = HAL_GetTick();
   while (HAL_GetTick() < start + ms);
 }
 
-void SetStartColumn(unsigned char d)
+/*
+ * unused
+static void SetStartColumn(unsigned char d)
 {
   oled_WrCmd(0x00+d%16);	// Set Lower Column Start Address for Page Addressing Mode
   // Default => 0x00
   oled_WrCmd(0x10+d/16);	// Set Higher Column Start Address for Page Addressing Mode
   // Default => 0x10
 }
+*/
 
-void SetAddressingMode(unsigned char d)
+static void SetAddressingMode(unsigned char d)
 {
   oled_WrCmd(0x20);			// Set Memory Addressing Mode
   oled_WrCmd(d);			// Default => 0x02
@@ -114,33 +119,38 @@ void SetAddressingMode(unsigned char d)
   // 0x02 => Page Addressing Mode
 }
 
-void SetColumnAddress(unsigned char a, unsigned char b)
+/*
+ * unused
+static void SetColumnAddress(unsigned char a, unsigned char b)
 {
   oled_WrCmd(0x21);			// Set Column Address
   oled_WrCmd(a);			// Default => 0x00 (Column Start Address)
   oled_WrCmd(b);			// Default => 0x7F (Column End Address)
 }
-
-void SetPageAddress(unsigned char a, unsigned char b)
+*/
+/*
+ * unused
+static void SetPageAddress(unsigned char a, unsigned char b)
 {
   oled_WrCmd(0x22);			// Set Page Address
   oled_WrCmd(a);			// Default => 0x00 (Page Start Address)
   oled_WrCmd(b);			// Default => 0x07 (Page End Address)
 }
+*/
 
-void SetStartLine(unsigned char d)
+static void SetStartLine(unsigned char d)
 {
   oled_WrCmd(0x40|d);		// Set Display Start Line
   // Default => 0x40 (0x00)
 }
 
-void SetContrastControl(unsigned char d)
+static void SetContrastControl(unsigned char d)
 {
   oled_WrCmd(0x81);			// Set Contrast Control
   oled_WrCmd(d);			// Default => 0x7F
 }
 
-void Set_Charge_Pump(unsigned char d)
+static void Set_Charge_Pump(unsigned char d)
 {
   oled_WrCmd(0x8D);			// Set Charge Pump
   oled_WrCmd(0x10|d);		// Default => 0x10
@@ -148,7 +158,7 @@ void Set_Charge_Pump(unsigned char d)
   // 0x14 (0x04) => Enable Charge Pump
 }
 
-void Set_Segment_Remap(unsigned char d)
+static void Set_Segment_Remap(unsigned char d)
 {
   oled_WrCmd(0xA0|d);		// Set Segment Re-Map
   // Default => 0xA0
@@ -156,7 +166,7 @@ void Set_Segment_Remap(unsigned char d)
   // 0xA1 (0x01) => Column Address 0 Mapped to SEG127
 }
 
-void Set_Entire_Display(unsigned char d)
+static void Set_Entire_Display(unsigned char d)
 {
   oled_WrCmd(0xA4|d);		// Set Entire Display On / Off
   // Default => 0xA4
@@ -164,7 +174,7 @@ void Set_Entire_Display(unsigned char d)
   // 0xA5 (0x01) => Entire Display On
 }
 
-void Set_Inverse_Display(unsigned char d)
+static void Set_Inverse_Display(unsigned char d)
 {
   oled_WrCmd(0xA6|d);		// Set Inverse Display On/Off
   // Default => 0xA6
@@ -172,13 +182,13 @@ void Set_Inverse_Display(unsigned char d)
   // 0xA7 (0x01) => Inverse Display On
 }
 
-void Set_Multiplex_Ratio(unsigned char d)
+static void Set_Multiplex_Ratio(unsigned char d)
 {
   oled_WrCmd(0xA8);			// Set Multiplex Ratio
   oled_WrCmd(d);			// Default => 0x3F (1/64 Duty)
 }
 
-void Set_Display_On_Off(unsigned char d)
+static void Set_Display_On_Off(unsigned char d)
 {
   oled_WrCmd(0xAE|d);		// Set Display On/Off
   // Default => 0xAE
@@ -186,13 +196,16 @@ void Set_Display_On_Off(unsigned char d)
   // 0xAF (0x01) => Display On
 }
 
-void SetStartPage(unsigned char d)
+/*
+ * unused
+static void SetStartPage(unsigned char d)
 {
   oled_WrCmd(0xB0|d);		// Set Page Start Address for Page Addressing Mode
   // Default => 0xB0 (0x00)
 }
+*/
 
-void Set_Common_Remap(unsigned char d)
+static void Set_Common_Remap(unsigned char d)
 {
   oled_WrCmd(0xC0|d);		// Set COM Output Scan Direction
   // Default => 0xC0
@@ -200,13 +213,13 @@ void Set_Common_Remap(unsigned char d)
   // 0xC8 (0x08) => Scan from COM63 to 0
 }
 
-void Set_Display_Offset(unsigned char d)
+static void Set_Display_Offset(unsigned char d)
 {
   oled_WrCmd(0xD3);			// Set Display Offset
   oled_WrCmd(d);			// Default => 0x00
 }
 
-void Set_Display_Clock(unsigned char d)
+static void Set_Display_Clock(unsigned char d)
 {
   oled_WrCmd(0xD5);			// Set Display Clock Divide Ratio / Oscillator Frequency
   oled_WrCmd(d);			// Default => 0x80
@@ -214,7 +227,7 @@ void Set_Display_Clock(unsigned char d)
   // D[7:4] => Oscillator Frequency
 }
 
-void Set_Precharge_Period(unsigned char d)
+static void Set_Precharge_Period(unsigned char d)
 {
   oled_WrCmd(0xD9);			// Set Pre-Charge Period
   oled_WrCmd(d);			// Default => 0x22 (2 Display Clocks [Phase 2] / 2 Display Clocks [Phase 1])
@@ -222,7 +235,7 @@ void Set_Precharge_Period(unsigned char d)
   // D[7:4] => Phase 2 Period in 1~15 Display Clocks
 }
 
-void Set_Common_Config(unsigned char d)
+static void Set_Common_Config(unsigned char d)
 {
   oled_WrCmd(0xDA);			// Set COM Pins Hardware Configuration
   oled_WrCmd(0x02|d);		// Default => 0x12 (0x10)
@@ -230,16 +243,19 @@ void Set_Common_Config(unsigned char d)
   // Disable COM Left/Right Re-Map
 }
 
-void Set_VCOMH(unsigned char d)
+static void Set_VCOMH(unsigned char d)
 {
   oled_WrCmd(0xDB);			// Set VCOMH Deselect Level
   oled_WrCmd(d);			// Default => 0x20 (0.77*VCC)
 }
 
-void Set_NOP(void)
+/*
+ * unused
+static void Set_NOP(void)
 {
   oled_WrCmd(0xE3);			// Command for No Operation
 }
+*/
 
 void oledInit(void)
 {
@@ -274,8 +290,9 @@ void oledInit(void)
   oled_Set_Pos(0,0);
 } 
 
-
-void oled_P6x8Char(unsigned char x,unsigned char y,unsigned char ch)
+/*
+ * unused
+static void oled_P6x8Char(unsigned char x,unsigned char y,unsigned char ch)
 {
   unsigned char c=0,i=0;
 
@@ -291,8 +308,9 @@ void oled_P6x8Char(unsigned char x,unsigned char y,unsigned char ch)
     oled_WrDat(F6x8[c][i]);
   }
 }
+*/
 
-void oled_P6x8Str(unsigned char x,unsigned char y,char ch[])
+static void oled_P6x8Str(unsigned char x,unsigned char y,char ch[])
 {
   coloredMsg(LOG_BLUE, false, "OLED: %d %d %s", x, y, ch);
 
@@ -315,7 +333,9 @@ void oled_P6x8Str(unsigned char x,unsigned char y,char ch[])
   }
 }
 
-void oled_P8x16Str(unsigned char x,unsigned char y,char ch[])
+/*
+ * unused
+static void oled_P8x16Str(unsigned char x,unsigned char y,char ch[])
 {
   unsigned char c=0,i=0,j=0;
   while (ch[j]!='\0')
@@ -340,10 +360,12 @@ void oled_P8x16Str(unsigned char x,unsigned char y,char ch[])
     j++;
   }
 }
+*/
 
 
-
-void oled_PrintBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char bmp[])
+/*
+ * unused
+static void oled_PrintBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char bmp[])
 { 	
   int ii=0;
   unsigned char x,y;
@@ -356,8 +378,11 @@ void oled_PrintBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned c
     }
   }
 }
+*/
 
-void oled_Cursor(unsigned char cursor_column, unsigned char cursor_row)
+/*
+ * unused
+static void oled_Cursor(unsigned char cursor_column, unsigned char cursor_row)
 {
   if(cursor_row != 0)
   {
@@ -371,7 +396,7 @@ void oled_Cursor(unsigned char cursor_column, unsigned char cursor_row)
     oled_WrDat(0xFF);
   }
 }
-
+*/
 
 
 #define MAX_LINES 8