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

/*
* Project 2.c
*
* Created on: 25-Sep-2022
* Author: rajam
*/
#include
#include "State.h"

static void(*state_table[])(void) = {Gear_Down, Checking_Before_Takeoff,Raising_Gear,
Gear_Up, Checking_Before_Landing, Lowering_Gear};

int main()
{
Init_State_Machine();
while(1)
{
state_table[current_state]();
}
}

/*
* State.h
*
* Created on: 29-Sep-2022
* Author: rajam
*/

#ifndef STATE_H_
#define STATE_H_
void Init_State_Machine();
void Gear_Down();
void Checking_Before_Takeoff();
void Raising_Gear();
void Gear_Up();
void Checking_Before_Landing();
void Lowering_Gear();

typedef enum State
{
GR_DWN,
CHK_BFR_TKFF,
RSING_GR,
GR_UP,
CHK_BFR_LND,
LWRNG_GR

}State_Type;

typedef enum Switch
{
Open,
Close

}Switch_Status;

typedef enum Pilot_Lever
{

Rising,
Falling,
UP,
DOWN

}Pilot_Lever_Status;

typedef enum Hydraulic_Mechanism
{
Working,
Malfunctioning

}Hydraulic_Mechanism_Status;

static volatile Switch_Status squat_switch;
static volatile Switch_Status limit_switch;
static volatile Pilot_Lever_Status pilot_lever;
static volatile Hydraulic_Mechanism_Status hydraulic_mechanism;

State_Type current_state;

typedef struct
{
char* current_state_indication;
char* light_status;
char* direction_valve_status;
char* hydraulic_pump_control_status;
char* gas_pressurized_spring_status[2];
}State_Table;

static State_Table State_Machine[6] = {
{"GearDown","Green","Down","Enabled",0,0},
{"Checking Before Take Off","Green","Down","Enabled",0,0},
{"Raising Gear","Red","Up","Enabled",{"Disabled","Enabled"}},
{"Gear Up","Off","Null","Disabled",0,0},
{"Checking Before Landing","Red","Down","Enabled",0,0},
{"Lowering Gear","Green","Down","Enabled",{"Disabled","Enabled"}}

};

#endif /* STATE_H_ */

/*
* Init_State_Machine.c
*
* Created on: 29-Sep-2022
* Author: rajam
*/
#include"State.h"

void Init_State_Machine()
{
current_state = GR_DWN;
printf("\nState Machine is initialized & Program is in Gear_Down State & Light Status: %s\n"
,State_Machine[current_state].light_status);
}

/*
* Gear _Down.c
*
* Created on: 29-Sep-2022
* Author: rajam
*/
#include"State.h"
#include

void Gear_Down(void)
{
current_state = GR_DWN;
printf("\n Enter the Pilot's Lever Position and Squat Switch Status:");
fflush(stdout);
scanf("%d %d",&pilot_lever,&squat_switch);
if(pilot_lever == Rising && squat_switch == Open)
{
current_state = CHK_BFR_TKFF;
printf("\nCurrent State: %s\n",State_Machine[current_state].current_state_indication);
printf("Light Status:%s\n", State_Machine[current_state].light_status);

}
else
{
Gear_Down();
}
}

/*
* Checking_Before_Takeoff.c
*
* Created on: 29-Sep-2022
* Author: rajam
*/
#include "State.h"
#include

void Checking_Before_Takeoff()
{
current_state = CHK_BFR_TKFF;
printf("\nEnter the Pilot's Lever Position,Squat Switch Status and Hydraulic Mechanism Status:");
fflush(stdout);
scanf("%d %d %d",&pilot_lever,&squat_switch,&hydraulic_mechanism);
printf("\nWait for 2 secs\n");
if(pilot_lever == Falling || squat_switch == Close)
{
Gear_Down();
}
else if(pilot_lever == UP && squat_switch == Open && hydraulic_mechanism == Working)
{
current_state = RSING_GR;
printf("\nCurrent State :%s\n",State_Machine[current_state].current_state_indication);
printf("Light Status: %s\n", State_Machine[current_state].light_status);
printf("Direction Valve Status:%s\n\n", State_Machine[current_state].direction_valve_status);
}
else if(pilot_lever == UP && squat_switch == Open && hydraulic_mechanism == Malfunctioning)
{
current_state = RSING_GR;
printf("\nCurrent State :%s\n",State_Machine[current_state].current_state_indication);
printf("Light Status: %s\n", State_Machine[current_state].light_status);
printf("Direction Valve Status:%s\n", State_Machine[current_state].direction_valve_status);
printf("Gas Pressurized Spring System Status:%s\n",State_Machine[current_state].gas_pressurized_spring_status[hydraulic_mechanism]);
}
}

/*
* Rising_Gear.c
*
* Created on: 29-Sep-2022
* Author: rajam
*/
#include"State.h"
#include

void Raising_Gear()
{
current_state = RSING_GR;
printf("\nEnter the Limit Switch Status,Pilots Leaver Status:");
fflush(stdout);
scanf("%d %d",&limit_switch,&pilot_lever);
printf("\nWait for 1 sec\n");
if(pilot_lever == Falling && limit_switch == Open)
{
current_state = CHK_BFR_LND;
printf("\nCurrent State: %s\n",State_Machine[current_state].current_state_indication);
printf("Light Status:%s\n",State_Machine[current_state].light_status);
printf("Hydraulic Control for Landing Gear Status:%s\n",State_Machine[current_state].hydraulic_pump_control_status);

}
else if(limit_switch == Close && pilot_lever == UP)
{
current_state = GR_UP;
printf("\nCurrent State: %s\n",State_Machine[current_state].current_state_indication);
printf("Light Status: %s\n", State_Machine[current_state].light_status);
printf("Hydraulic Control for Landing Gear Status:%s\n", State_Machine[current_state].hydraulic_pump_control_status);

}
else
{
Raising_Gear();

}

}

/*
* Gear_Up.c
*
* Created on: 29-Sep-2022
* Author: rajam
*/
#include"State.h"
#include

void Gear_Up()
{
current_state = GR_UP;
printf("\nEnter the Pilot's Lever Position:");
fflush(stdout);
scanf("%d",&pilot_lever);
if(pilot_lever == Falling)
{
current_state = CHK_BFR_LND;
printf("\nCurrent State: %s\n",State_Machine[current_state].current_state_indication);
printf("Light Status:%s\n", State_Machine[current_state].light_status);
printf("Hydraulic Control for Landing Gear Status:%s\n",State_Machine[current_state].hydraulic_pump_control_status);
}
else
{Gear_Up();

}
}

/*
* Check_Before_Landing.c
*
* Created on: 29-Sep-2022
* Author: rajam
*/
#include "State.h"
#include
void Checking_Before_Landing()
{
current_state = CHK_BFR_LND;
printf("\nEnter the Pilot's Lever Position and Status of Hydraulic Mechanism:");
fflush(stdout);
scanf("%d %d",&pilot_lever,&hydraulic_mechanism);
if(pilot_lever == DOWN && hydraulic_mechanism == Working)
{
current_state = LWRNG_GR;
printf("\nCurrent State:%s\n", State_Machine[current_state].current_state_indication);
printf("Light Status:%s\n", State_Machine[current_state].light_status);
printf("Direction Valve Status:%s\n", State_Machine[current_state].direction_valve_status);
}
else if(pilot_lever == DOWN && hydraulic_mechanism == Malfunctioning)
{
current_state = LWRNG_GR;
printf("\nCurrent State:%s\n",State_Machine[current_state].current_state_indication);
printf("Light Status:%s\n", State_Machine[current_state].light_status);
printf("Direction Valve Status:%s\n", State_Machine[current_state].direction_valve_status);
printf("Gas Pressurized Spring System Status:%s\n",State_Machine[current_state].gas_pressurized_spring_status[hydraulic_mechanism]);

}
else if(pilot_lever == (UP || Rising || Falling))

{
Checking_Before_Landing();
}
}

/*
* Lowering_Gear.c
*
* Created on: 29-Sep-2022
* Author: rajam
*/
#include "State.h"
#include
void Lowering_Gear()
{
current_state = LWRNG_GR;
printf("\nEnter the Limit Switch Status,Pilots Leaver Status:");
fflush(stdout);
scanf("%d %d",&limit_switch,&pilot_lever);
if(limit_switch == Close && pilot_lever == Rising )
{
current_state = CHK_BFR_TKFF;
printf("\nCurrent State:%s\n",State_Machine[current_state].current_state_indication);
printf("Light Status:%s\n",State_Machine[current_state].light_status);

}
if(limit_switch == Open && pilot_lever == DOWN)
{
current_state = GR_DWN;
printf("\nCurrent State:%s\n",State_Machine[current_state].current_state_indication);
printf("Light Status:%s\n",State_Machine[current_state].light_status);
printf("Hydraulic Controlfor Landing Gear Status:%s\n",State_Machine[current_state].hydraulic_pump_control_status);

}
else
{
Lowering_Gear();
}

}