Project 2 - Implement the Code for controlling the retraction and extension of Airplane’s landing gear
Controlling the Retraction and extension of Airplane’s landing gear can be implemented using Finite State Machine (FSM).
////// CODE////
#include<stdio.h>//Preprocessor section
void Geardown();// Global declaration of function
void checkingbeforeTakeoff();
void RaisingGear();
void Gearup();
void CheckingbeforeLanding();
void LoweringGear(void);
void Init_state_Machine();
typedef enum state
{
GEARDOWN,
CHECKINGBEFORETAKEOFF,
RAISINGGEAR,
GEARUP,
CHECKINGBEFORELANDING,
LOWERINGGEAR,
}state_type;// Enumerated data type of state_type
typedef enum switch_case
{
on,
off,
}Switch_state;// Enumerated data type of Switcch_state
typedef enum piolot_lever
{
raising,
falling,
}Piolot_lever;//Enumerated data type of Piolot_lever
typedef enum hydraulic_mechanism
{
running,
pause,
}Hydraulic_mechanism;//Enumerated data type of Hydraulic_mechanism
static volatile Piolot_lever piolot_lever ;// input for changing the state
static volatile Switch_state limit_switch;
static volatile Switch_state squat_switch;
static volatile Hydraulic_mechanism hydraulic_mechanism;
state_type current_state;
// State Table attributes declaration
typedef struct
{
char* current_state_indication;
char* light;
char* hydraulic_lever__landing_gear;
char* direction_valve_status;
int time;
char* Gas_pressure_fluid_flow[2];
}State;
// State Table formation
State state_Machine[6]=
{
{"GEARDOWN","Green","Enable","Down",4,{NULL,NULL}},
{"CHECKINGBEFORETAKEOFF","Green","Enabled","Down",3,{NULL,NULL}},
{"RAISINGGEAR","Red","Enable","Up",0,{"Disable","Enable"}},
{"GEARUP","Off","disable","NULL",0,{NULL,NULL}},
{"CHECKINGBEFORELANDING","Red","Enable","DOWN",4,{NULL,NULL}},
{"LOWERINGGEAR","Green","Enable","DOWN",0,{"Disable","Enable"}}
};
void Geardown(void)
{
current_state=GEARDOWN;
printf("\n Enter the status of piolot's lever and squat switch:");
fflush(stdout);
scanf("%u",&piolot_lever);
scanf("%u",&squat_switch);
if((piolot_lever==raising )&& (squat_switch==on))
{
current_state=CHECKINGBEFORETAKEOFF;
printf("\n current status:%s",state_Machine[current_state].current_state_indication);
printf("\n Light is:%s",state_Machine[current_state].light);
printf("\n Status of Direction Valve is:%s",state_Machine[current_state].direction_valve_status);
printf("\n Time :%d",state_Machine[current_state].time);
}
}
void checkingbeforeTakeoff(void)
{
current_state=CHECKINGBEFORETAKEOFF;
printf("\n Enter the status of piolot's lever and hydraulic mechanism:");
fflush(stdout);
scanf("%u %u",&piolot_lever,&hydraulic_mechanism);
if((piolot_lever==falling) &&( squat_switch==off))
{
Geardown();
}
else if(piolot_lever==raising&&squat_switch==on&&hydraulic_mechanism==running)
{
current_state=RAISINGGEAR;
printf("\n current status:%s\n ",state_Machine[current_state].current_state_indication);
printf("\n Light is:%s",state_Machine[current_state].light);
printf("\n Status of Direction Valve is:%s",state_Machine[current_state].direction_valve_status);
printf("\n Hydraulic mechanism is:%s",state_Machine[current_state].hydraulic_lever__landing_gear);
printf("\n Time :%d",state_Machine[current_state].time);
}
else if((piolot_lever==raising)&&(squat_switch==on)&&(hydraulic_mechanism==pause))
{
current_state=RAISINGGEAR;
printf("\n current status:%s",state_Machine[current_state].current_state_indication);
printf("\n Light is:%s",state_Machine[current_state].light);
printf("\n Status of Direction Valve is:%s",state_Machine[current_state].direction_valve_status);
printf("\n Hydraulic mechanism is:%s",state_Machine[current_state].hydraulic_lever__landing_gear);
printf("\n Gas_pressured and fluid flow:%p",state_Machine[current_state].Gas_pressure_fluid_flow);
printf("\n Time :%d",state_Machine[current_state].time);
}
}
void RaisingGear(void)
{
current_state=RAISINGGEAR;
printf("\n Enter the status of piolot's lever and limit switch :");
fflush(stdout);
scanf("%u %u",&piolot_lever,&limit_switch);
if(piolot_lever==falling&&squat_switch==on)
{
current_state=CHECKINGBEFORELANDING;
printf("\n current status:%s",state_Machine[current_state].current_state_indication);
printf("\n Light is:%s",state_Machine[current_state].light);
printf("\n Status of Direction Valve is:%s",state_Machine[current_state].direction_valve_status);
printf("\n Hydraulic mechanism is:%s",state_Machine[current_state].hydraulic_lever__landing_gear);
printf("\n Gas_pressured and fluid flow:%p",state_Machine[current_state].Gas_pressure_fluid_flow);
printf("\n Time :%d",state_Machine[current_state].time);
}
else if(piolot_lever==raising&&limit_switch==off)
{
current_state=GEARUP;
printf("\n current status:%s",state_Machine[current_state].current_state_indication);
printf("\n Light is:%s",state_Machine[current_state].light);
printf("\n Status of Direction Valve is:%s",state_Machine[current_state].direction_valve_status);
printf("\n Hydraulic mechanism is:%s",state_Machine[current_state].hydraulic_lever__landing_gear);
printf("\n Gas_pressured and fluid flow:%p",state_Machine[current_state].Gas_pressure_fluid_flow);
printf("\n Time :%d",state_Machine[current_state].time);
}
else
{
RaisingGear();
}
}
void Gearup(void)
{
current_state=GEARUP;
printf("\n Enter the status of piolot's lever and limit switch :");
fflush(stdout);
scanf("%u",&piolot_lever);
if(piolot_lever==falling)
{
current_state=CHECKINGBEFORELANDING;
printf("\n current status:%s",state_Machine[current_state].current_state_indication);
printf("\n Light is:%s",state_Machine[current_state].light);
printf("\n Status of Direction Valve is:%s",state_Machine[current_state].direction_valve_status);
printf("\n Gas_pressured and fluid flow:%p",state_Machine[current_state].Gas_pressure_fluid_flow);
printf("\n Time :%d",state_Machine[current_state].time);
}
else
{
Gearup();
}
}
void CheckingbeforeLanding(void)
{
current_state=CHECKINGBEFORELANDING;
printf("\n Enter the status of piolot's lever and hydraulic mechanism:");
fflush(stdout);
scanf("%u %u",&piolot_lever,&hydraulic_mechanism);
if(piolot_lever==falling&&hydraulic_mechanism==running)
{
current_state=LOWERINGGEAR;
printf("\n current status:%s",state_Machine[current_state].current_state_indication);
printf("\n Light is:%s",state_Machine[current_state].light);
printf("\n Status of Direction Valve is:%s",state_Machine[current_state].direction_valve_status);
printf("\n Hydraulic mechanism is:%s",state_Machine[current_state].hydraulic_lever__landing_gear);
printf("\n Gas_pressured and fluid flow:%p",state_Machine[current_state].Gas_pressure_fluid_flow);
printf("\n Time :%d",state_Machine[current_state].time);
}
else if((piolot_lever==falling)&&(hydraulic_mechanism==pause&&limit_switch==off))
{
current_state=CHECKINGBEFORELANDING;
printf("\n current status:%s",state_Machine[current_state].current_state_indication);
printf("\n Light is:%s",state_Machine[current_state].light);
printf("\n Status of Direction Valve is:%s",state_Machine[current_state].direction_valve_status);
printf("\n Gas_pressured and fluid flow:%p",state_Machine[current_state].Gas_pressure_fluid_flow);
printf("\n Time :%d",state_Machine[current_state].time);
}
else
{
CheckingbeforeLanding();
}
}
void LoweringGear(void)
{
current_state=LOWERINGGEAR;
printf("\n Enter the status of piolot's lever and limit switch:");
fflush(stdout);
scanf("%u %u",&piolot_lever,&limit_switch);
if(piolot_lever==raising&&squat_switch==off)
{
current_state=CHECKINGBEFORELANDING;
printf("\n current status:%s",state_Machine[current_state].current_state_indication);
printf("\n Light is:%s",state_Machine[current_state].light);
printf("\n Status of Direction Valve is:%s",state_Machine[current_state].direction_valve_status);
printf("\n Time :%d",state_Machine[current_state].time);
}
if(piolot_lever==raising&&squat_switch==off)
{
current_state=GEARDOWN;
printf("\n current status:%s",state_Machine[current_state].current_state_indication);
printf("\n Light is:%s",state_Machine[current_state].light);
printf("\n Time :%d",state_Machine[current_state].time);
}
else
{
LoweringGear();
}
}
void Init_state_Machine()
{
current_state=GEARDOWN;
printf("\n current status:%s",state_Machine[current_state].current_state_indication);
printf("\n Light is:%s",state_Machine[current_state].light);
printf("\n Time :%d",state_Machine[current_state].time);
}
static void( *StateTable[])(void)={Geardown,CheckingbeforeLanding,Gearup,CheckingbeforeLanding,LoweringGear};
int main()// Main function start from here
{
Init_state_Machine();
while(1)
{
StateTable[current_state]();
}
}