//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+lcddev.xoffset)>>8);
	LCD_WR_DATA(xStar+lcddev.xoffset);		
	LCD_WR_DATA((xEnd+lcddev.xoffset)>>8);
	LCD_WR_DATA(xEnd+lcddev.xoffset);

	LCD_WR_REG(0x2B);	           //Set Y coordinate
	LCD_WR_DATA((yStar+lcddev.yoffset)>>8);
	LCD_WR_DATA(yStar+lcddev.yoffset);		
	LCD_WR_DATA((yEnd+lcddev.yoffset)>>8);
	LCD_WR_DATA(yEnd+lcddev.yoffset);

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