CEC_ST_RX_LOW_DRIVE
case CEC_ST_RX_LOW_DRIVE:
pin->state <= CEC_ST_RX_LOW_DRIVE)
pin->state = CEC_ST_RX_LOW_DRIVE;
pin->state = CEC_ST_RX_LOW_DRIVE;
pin->state = CEC_ST_RX_LOW_DRIVE;