async_flowcontrol_hw_input
static void async_flowcontrol_hw_input(struct asycom *asy,
async_flowcontrol_hw_input(asy, FLOW_STOP, IN_FLOW_RINGBUFF);
async_flowcontrol_hw_input(asy, FLOW_STOP,
async_flowcontrol_hw_input(asy, FLOW_START,
async_flowcontrol_hw_input(asy, FLOW_START, IN_FLOW_RINGBUFF);
async_flowcontrol_hw_input(asy, FLOW_STOP,
async_flowcontrol_hw_input(asy, FLOW_START,