Project 2 - Implement the Code for controlling the retraction and extension of Airplane’s landing gear

#include<stdio.h>
#include "states.h"

void Initiate_State_Machine();
void GearDown();
void CheckingBeforeTakeOFF();
void RaisingGear();
void GearUP();
void CheckBeforeLanding();
void LoweringGear();

static void(*stateTable[])(void)={GearDown, CheckingBeforeTakeOFF, RaisingGear, GearUP, CheckBeforeLanding, LoweringGear};

int main()
{Initiate_State_Machine();
while(1)
{
stateTable[current_state]();
}
}

//GearDown
void GearDown(void)
{
current_state=GEAR_DOWN;
printf("Enter the status of pilot's lever and squat switch:");
fflush(stdout);
scanf("%d %d", &pilot_lever, &squat_switch);
if(pilot_lever==Raising && squat_switch==On)
{
current_state=CHECKING_BEFORE_TAKEOFF;
printf("Current state:%s\n", State_Machine[current_state].current_state_indication);
printf("Light is: %s\n", State_Machine[current_state].light);
}
else
{
GearDown();
}
}

//CheckingBeforeTakeOFF
void CheckingBeforeTakeOFF(void)
{
current_state=CHECKING_BEFORE_TAKEOFF;
printf("Enter the status of pilot's lever and squat switch and hydraulic mechanism:");
fflush(stdout);
scanf("%d %d", &pilot_lever, &squat_switch, &hydraulic_mechanism);
if(pilot_lever==falling && squat_switch==Off)
{
GearDown();
}
else if(pilot_lever==Raising && squat_switch==On && hydraulic_mechanism== working)
{
current_state=RAISING_GEAR;
printf("Current state:%s\n", State_Machine[current_state].current_state_indication);
printf("Light is: %s\n", State_Machine[current_state].light);
printf("Status of Direction valve: %s\n",State_Machine[current_state].direction_valve_status);

}
else if(pilot_lever==Raising && squat_switch==On && hydraulic_mechanism== not_working)
{
current_state=RAISING_GEAR;
printf("Current state:%s\n", State_Machine[current_state].current_state_indication);
printf("Light is: %s\n", State_Machine[current_state].light);
printf("Status of Direction valve: %s\n",State_Machine[current_state].direction_valve_status);
printf("Status of Gas Pressurised Spring System:%s\n",State_Machine[current_state].Gas_Pressurized_Spring_system_status);
}
else
{
CheckingBeforeTakeOFF();
}
}

//RaisingGear
void RaisingGear(void)
{
current_state=RAISING_GEAR;
printf("Enter the status of pilot's lever and limit switch:");
fflush(stdout);
scanf("%d %d", &pilot_lever, &limit_switch);
if(pilot_lever==falling && limit_switch==On)
{
current_state=CHECK_BEFORE_LANDING;
printf("Current state:%s\n", State_Machine[current_state].current_state_indication);
printf("Light is: %s\n", State_Machine[current_state].light);
printf("Landing Gear Hydraulic Control:%s\n", State_Machine[current_state].landing_gear_hydraulic_control);

}
else if(pilot_lever==Raising && limit_switch==On)
{
current_state=GEAR_UP;
printf("Current state:%s\n", State_Machine[current_state].current_state_indication);
printf("Light is: %s\n", State_Machine[current_state].light);
printf("Landing Gear Hydraulic Control:%s\n", State_Machine[current_state].landing_gear_hydraulic_control);

}
else
{
RaisingGear();
}
}

//GearUP
void GearUP(void)
{
current_state=GEAR_UP;
printf("Enter the status of pilot's lever:");
fflush(stdout);
scanf("%d", &pilot_lever);
if(pilot_lever==falling)
{
current_state=CHECK_BEFORE_LANDING;
printf("Current state:%s\n", State_Machine[current_state].current_state_indication);
printf("Light is: %s\n", State_Machine[current_state].light);
printf("Landing Gear Hydraulic Control:%s\n", State_Machine[current_state].landing_gear_hydraulic_control);

}
else
{
GearUP();
}
}

//CheckBeforeLanding
void CheckBeforeLanding(void)
{
current_state=CHECK_BEFORE_LANDING;
printf("Enter the status of pilot's lever and hydraulic mechanism status:");
fflush(stdout);
scanf("%d %d", &pilot_lever, &hydraulic_mechanism);
if(pilot_lever==falling && hydraulic_mechanism==working)
{
current_state=LOWERING_GEAR;
printf("Current state:%s\n", State_Machine[current_state].current_state_indication);
printf("Light is: %s\n", State_Machine[current_state].light);
printf("Status of Direction valve: %s\n",State_Machine[current_state].direction_valve_status);

}
else if(pilot_lever==falling && squat_switch==On && hydraulic_mechanism== not_working)
{
current_state=LOWERING_GEAR;
printf("Current state:%s\n", State_Machine[current_state].current_state_indication);
printf("Light is: %s\n", State_Machine[current_state].light);
printf("Status of Direction valve: %s\n",State_Machine[current_state].direction_valve_status);
printf("Status of Gas Pressurised Spring System:%s\n",State_Machine[current_state].Gas_Pressurized_Spring_system_status);
}
if(pilot_lever== (Raising || falling))
{
CheckBeforeLanding();
}
}

//LoweringGear
void LoweringGear(void)
{
current_state=LOWERING_GEAR;
printf("Enter the status of pilot's lever and limit switch:");
fflush(stdout);
scanf("%d %d", &pilot_lever, &limit_switch);
if(pilot_lever==Raising && limit_switch==On)
{
current_state=CHECKING_BEFORE_TAKEOFF;
printf("Current state:%s\n", State_Machine[current_state].current_state_indication);
printf("Light is: %s\n", State_Machine[current_state].light);
}
if(pilot_lever==Raising && limit_switch==Off)
{
current_state=GEAR_DOWN;
printf("Current state:%s\n", State_Machine[current_state].current_state_indication);
printf("Light is: %s\n", State_Machine[current_state].light);
printf("Landing Gear Hydraulic Control:%s\n", State_Machine[current_state].landing_gear_hydraulic_control);
}
if(limit_switch==Off)
{
LoweringGear();
}

}

void Initiate_State_Machine()
{
current_state=GEAR_DOWN;
printf("The finite State Machine is Initiated and current the program is in"
"GearDown State & Light is: %s\n", State_Machine[current_state].light);

}

//HEADER FILE

#ifndef STATES_H_
#define STATES_H_

#include<stdio.h>
void Initiate_State_Machine();
void GearDown();
void CheckingBeforeTakeOFF();
void RaisingGear();
void GearUP();
void CheckBeforeLanding();
void LoweringGear();

typedef enum State
{
GEAR_DOWN,
CHECKING_BEFORE_TAKEOFF,
RAISING_GEAR,
GEAR_UP,
CHECK_BEFORE_LANDING,
LOWERING_GEAR
}State_Type;

typedef enum Switch
{
On,
Off //plane on ground
}Switch_status;

typedef enum pilot_lever
{
Raising,
falling
}Pilot_lever;

typedef enum hydraulic_mechanism
{
working,
not_working
}Hydraulic_mechanism;

static volatile Switch_status squat_switch;
static volatile Switch_status limit_switch;
static volatile Pilot_lever pilot_lever;
static volatile Hydraulic_mechanism hydraulic_mechanism;

State_Type current_state;
typedef struct
{
char* current_state_indication;
char* light;
char* direction_valve_status;
char* Gas_Pressurized_Spring_system_status[2];
char* landing_gear_hydraulic_control;

}State_Table;

static State_Table;
State_Table State_Machine[6] =
{
{"GearDown", "Green", "Down", "Enabled",{NULL,NULL}},
{"CheckingBeforeTakeOFF", "Green", "Down", "Enabled",{NULL,NULL}},
{"RaisingGear", "Red", "Up", "Enabled",{"Disabled","Enabled"}},
{"GearUp", "Off", "Null", "Disabled",{NULL,NULL}},
{"CheckingbeforeLnding", "Red", "Down", "Enabled",{NULL,NULL}},
{"LoweringGear", "Green", "Down", "Enabled",{"Disabled", "Enabled"}}

};

#endif /* STATES_H_ */