static u_char LcdReadCmd(void)
{
    sbi(LCD_REGSEL_DDR, LCD_REGSEL_BIT);
    cbi(LCD_REGSEL_PORT, LCD_REGSEL_BIT);
    return LcdReadByte();
}
/*!
 * \brief Read status byte from LCD controller.
 */
static unsigned int LcdReadStatus(void)
{
    /* RS low selects status register. */
    LCD_RS_CLR();
    return LcdReadByte();
}