Project 2 - Implement the Code for controlling the retraction and extension of Airplane’s landing gear
/*
* main.c
*
* Created on: 06-May-2022
* Author: somprakash
*/
#include<stdio.h>//Header file
#include"States.h"//Created header file
static void (*state_table[])(void)={Gear_Down,Checking_Before_Takeoff,Raising_Gear,Gear_Up,Checking_Before_Landing,Lowering_Gear};
//Variables
int main()
{
Init_State_Machine();//Function calling
while(1)//Loop
{
state_table[current_state]();
}
return 0;
}
/*
* States.h
*
* Created on: 06-May-2022
* Author: somprakash
*/
#ifndef STATES_H_
#define STATES_H_
#include<stdio.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
{
//States
GR_DWN,
CHK_BFR_TKFF,
RSING_GR,
GR_UP,
CHK_BFR_LND,
LWRNG_GR
}State_Type;
typedef enum Switch {
Open,
Close//Plane is in ground
}Switch_Status;
typedef enum Pilot_Lever
{
Rising,
Falling,
UP,
DOWN
}Pilot_Lever_Status;
typedef enum Hydraulic_Mechanism
{
Working,
Malfunctioning
}Hydraulic_Mechanism_Status;
/* -input for changing the State----- */
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] = {
{"Gear Down", "Green", "Down", "Enabled" },//{0,0}
{"Checking Before Take Off", "Green", "Down", "Enabled"},
{"Raising Gear", "Red", "Up", "Enabled"},
{"Gear Up", "Off", "0","Disabled"},
{"Checking Before Landing", "Red", "Down", "Enabled"},
{"Lowering Gear", "Green", "Down", "Enabled"}
};
#endif /* STATES_H_ */
/*
* Gear_Down.c
*
* Created on: 06-May-2022
* Author: somprakash
*/
#include"States.h"
void Gear_Down(void)
{
current_state = GR_DWN;
printf("\nCurrent State: %s\n", State_Machine [current_state]. current_state_indication);
printf("\nEnter 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();
}
}
/*
* Lowering_Gear.c
*
* Created on: 06-May-2022
* Author: somprakash
*/
#include "States.h"
void Lowering_Gear(){
//State
current_state = LWRNG_GR;
printf("\nCurrent State: %s\n",State_Machine[current_state].current_state_indication);
printf("\nEnter the Limit Switch Status, Pilots Leaver Status:");
fflush(stdout);
scanf("%d %d",&limit_switch,&pilot_lever);//taking i/p from the user
if(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)
{
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 Control for Landing Gear Status:%s\n",State_Machine[current_state].hydraulic_pump_control_status);
}
if(limit_switch == Close)
{
Lowering_Gear();
}}
/*
* Init_State_Machine.c
*
* Created on: 06-May-2022
* Author: somprakash
*/
#include "States.h"
void Init_State_Machine()//func
{
//System Initialized and its in State A
current_state = GR_DWN;
printf("\nState Machine is initialized & Program is in Gear_Down State & Light Status",State_Machine [current_state].light_status);
}
/*
* Checking_Before_Takeoff.c
*
* Created on: 06-May-2022
* Author: somprakash
*/
#include "States.h"
void Checking_Before_Takeoff()//func
{
current_state = CHK_BFR_TKFF;
printf("\nCurrent State : %s\n",State_Machine[current_state].current_state_indication);
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]);
}
}
/*
* Gear_Up.c
*
* Created on: 06-May-2022
* Author: somprakash
*/
#include "States.h"
void Gear_Up()//func
{
current_state = GR_UP;
printf("\nCurrent State: %s\n",State_Machine[current_state].current_state_indication);
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();
}
}
/*
* Raising_Gear.c
*
* Created on: 06-May-2022
* Author: somprakash
*/
#include "States.h"
void Raising_Gear()//func
{
current_state = RSING_GR;
printf("\nCurrent State : %s\n",State_Machine[current_state].current_state_indication);
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();
}
}
/*
* Checking_Before_Landing.c
*
* Created on: 06-May-2022
* Author: somprakash
*/
#include "States.h"
void Checking_Before_Landing()//func
{
current_state = CHK_BFR_LND;
printf("\nCurrent State: %s\n",State_Machine[current_state].current_state_indication);
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);
}
if(pilot_lever == (UP || Rising || Falling))
{
Checking_Before_Landing();
}}
/*Output*/
