HDLCD_INTERRUPT_VSYNC
hdlcd_write(hdlcd, HDLCD_REG_INT_MASK, mask | HDLCD_INTERRUPT_VSYNC);
hdlcd_write(hdlcd, HDLCD_REG_INT_MASK, mask & ~HDLCD_INTERRUPT_VSYNC);
if (irq_status & HDLCD_INTERRUPT_VSYNC)
if (irq_status & HDLCD_INTERRUPT_VSYNC)