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

OFFLINE

#include <stdio.h>
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;
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"}}

};
void Lowering_Gear()
{
current_state = LWRNG_GR;
printf("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\n Enter the limit Switch Status,pilot's lever Position");
fflush(stdout);
scanf("%d%d",&pilot_lever, &limit_switch);
if(limit_switch == Close && pilot_lever == Rising )
{
current_state=CHK_BFR_TKFF;
printf("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\nLight Status: %s",State_Machine[current_state].light_status);
}
if(limit_switch == Open && pilot_lever ==DOWN)
{
current_state = GR_DWN;
printf("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\nLight Status: %s",State_Machine[current_state].light_status);
printf("Hydraulic Control for Landing Gear Status:%s\n",State_Machine[current_state].hydraulic_pump_control_status);
}
else
{
Lowering_Gear();
}

}

void Checking_Before_Takeoff()
{
current_state = CHK_BFR_TKFF;
printf("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\n Enter the pilot's lever Position, Squat Switch Status and Hydraulic Mechanism Status:");
fflush(stdout);
scanf("%d %d %d",&pilot_lever, &Squat_Switch, &hydraulic_mechanism);
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("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\nLight Status: %s",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)
{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]);
}

}
void Checking_Before_Landing()
{
current_state = CHK_BFR_LND;
printf("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\n Enter the Pilot's Lever Position and HydraulicMechanism Status:");

fflush(stdout);
scanf("%d %d",&pilot_lever, &hydraulic_mechanism);
if(pilot_lever == DOWN && hydraulic_mechanism == Working)
{
current_state = LWRNG_GR;
printf("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\nLight State: %s",State_Machine[current_state].light_status);
printf("Direction Valve Status:%s\n\n",State_Machine[current_state].direction_valve_status);
}
else if(pilot_lever== DOWN && hydraulic_mechanism == Malfunctioning)
{
current_state = LWRNG_GR;
printf("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\nLight Status: %s",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]);
}
if(pilot_lever == (UP||Rising||Falling))
{
Checking_Before_Landing();
}
}
void Raising_Gear()
{
current_state = RSING_GR;
printf("\nCurrent State:%s\n",State_Machine[current_state].current_state_indication);
printf("\n Enter the Limit Switch Status,Pilots Lever Status:");
fflush(stdout);
scanf("%d %d",&limit_switch,&pilot_lever);

if(pilot_lever == Falling && limit_switch == Open)
{
current_state=CHK_BFR_LND;
printf("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\nLight State: %s",State_Machine[current_state].light_status);
printf("Hydraulic Control for Landing Gear State:%s\n\n",State_Machine[current_state].hydraulic_pump_control_status);
}
else if(limit_switch == Close && pilot_lever == UP)
{
current_state=GR_UP;
printf("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\n Light State: %s",State_Machine[current_state].light_status);
printf("\n Hydraulic Control for landing Gear Status:%s\n",State_Machine[current_state].hydraulic_pump_control_status);
}
else
{
Raising_Gear();
}
}
void Gear_Down(void)
{
current_state = GR_DWN;
printf("\nCurrent State:%s\n",State_Machine[current_state].current_state_indication);
printf("\n Enter the pilot's Lever Position, 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("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\nLight State: %s",State_Machine[current_state].light_status);
}
else
{
Gear_Down();
}

}


void Init_State_Machine()
{

current_state = GR_DWN;
printf("\n State Machine is initialized & Program is in Gear_Down_state & Light_Status:%s\n",State_Machine[current_state].light_status);
}
void Gear_Up()
{
current_state = GR_UP;
printf("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\n Enter the Pilot's lever Position ");
fflush(stdout);
scanf("%d",&pilot_lever);
if(pilot_lever == Falling)

{
current_state=CHK_BFR_LND;
printf("\n Current State:%s\n",State_Machine[current_state].current_state_indication);
printf("\nLight Status: %s",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();
}
}
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]();
}
}