//St7789v setting display window method
void LCD_SetWindows(u16 xStar,u16 yStar,u16 xEnd,u16 yEnd)
{	
	LCD_WR_REG(0x2A);	      //Set X coordinate
	LCD_WR_DATA(xStar>>8);
	LCD_WR_DATA(0x00FF&xStar);		
	LCD_WR_DATA(xEnd>>8);
	LCD_WR_DATA(0x00FF&xEnd);

	LCD_WR_REG(0x2B);	    //Set Y coordinate
	LCD_WR_DATA(yStar>>8);
	LCD_WR_DATA(0x00FF&yStar);		
	LCD_WR_DATA(yEnd>>8);
	LCD_WR_DATA(0x00FF&yEnd);

	LCD_WR_REG(0x2C);  //Start writing gram			
}