Source
Code of the C program that
when
debugged will run the system
Notes
to this program: This program is no where near complete, there are
still situations that occur when they shouldn't. Some of these situations
arise because the program will sometimes set carinside equal to 2, which
is a state that has no consequences. However, we have not yet fixed
this error as we are decided whether or not a state of carinside=2 is beneficial
or not. It has its benefits either way. Also this main program
is intended for visual purposes. The use of printf statements is
only so that you, the interested viewer, can try to understand what is
going on, and so that we the programmers can see what is happening and
when, so that we can iron out any bugs. ...If only Microsoft did this when
programming Windows 98 (or any software for that matter)! This source
code now has quite a lot of comments, so that you can understand what is
going on with less required thought. As this program is no where
near complete, its user- friendliness is rather lacking but you are quite
free to trial the program by following this link here.
PROGRAM
STARTS HERE:
/*
A - SensorA is the motion sensor inside the garage.
B - SensorB is the motion sensor outside the garage.
C is the sensor at the door (which will determine whether or not it is safe
to close the door.
The power for the chip on the car will run from the auxiliary power in
the car.
...So that any movement of the door will not occur unless the car is running.
*/
#include
<string.h>
#include
<stdio.h>
#include
<ctype.h>
#include
<time.h>
int scancar(void);
//controls transmitter & receiver & decodes
information
void delay(int);
//useless, clock-based delaying function
void opendoor();
//Opens the garage door and flags door as open
void closedoor();
//Closes the garage door and flags door as closed
void leavegar();
//Sequence for leaving the garage -Seen only if car is inside
void entergar();
//Sequence for entering the garage -Seen only if
car is outside
void notmovin();
//Security functions when there is movement, where
there is no car
void updatinp();
//Routine that checks the inputs until a change occurs
int A, B, C;
//input signals (refer to top of page)
int door=0;
//door is 1 if closed and 0 if open
int carinside,
carhome;
//carinside is 1 if car is in garage. Carhome
is 1 if detected by 'scanner'
int carcoming=0;
//carcoming is 1 if car is coming in and is determined
by a series of events
int mcarleaving=0,
carleaving=0, m5leave=0; //maybe car leaving,
car is leaving, car maybe leaving after 5 minutes/
int mcoming=0,
maybe=0;
//maybe car coming in, 'maybe' may be used later to replace mcarleaving
and mcoming (=0,1,2)
int count=1;
void
main()
{
A=B=C=0;
//change later
printf("Note:
when entering in values for A, B, and C, they must be entered");
printf(" as
1s or 0s and separated by spaces. Ie to say that Sensor A ");
printf("is
on, Sensor B is off and the Door Sensor (C) is off, you would ");
printf("key
in: 1 0 0.\nThe following is the sequence that would happen ");
printf("if
the car was going out:\n1 0 0 \n1 0 1 or 0 0 1\n0 0 1 or 0 1 1 ");
printf("or
1 1 1\nnoting that the car would have to be turned on (carhome=1)");
printf("\n\nInitial
state...Door is open\n");
if (C==0)
//No object is in doorway
{closedoor();
//Close the door as it will be installed in an open
state.
printf("because
no object was in the way....Car is inside.\n");
carinside=1;
//Initial value, In final program, user will have option to change this.
} //end
if (C==0)
updatinp();
do
{notmovin();
if (carinside==0)
//If the car is already inside, there is no need
to
entergar();
// initiate the sequence of entering the garage if
the
else if
(carinside==1)
// car is leaving. And vise verse. These
if statements
leavegar();
// merely save potential time
else if
(carinside==2)
//this is only temporary and its use will be
{entergar();
leavegar();}
//determined later.
else
updatinp();
printf("\nA%d,
B%d, C%d, door%d\n",A ,B ,C ,door);
printf("carinside%d,
carleaving%d, mcarleaving%d, carhome%d,\n"
,carinside,carleaving,mcarleaving, carhome);
}while
((A==0 || A==1) && (B==0 || B==1) && (C==0 || C==1));
printf("At
total end of program\n");
}
// end program
/*
The do-while statement will keep the program looping while there are valid
inputs. The program will, at a later stage be able to have the user
stop the process. This will be pass-word protected or something similar.
There may also be 2 passwords: 1 for the user, and one for the technician.
This will mean that only the non-vital parts of the system can be modified
by the user, while the technician can have more liberal access. */
int
scancar()
{int carhome;
//#define
btrans(*(base address of PIT +0x1))
/*base transmitter*/
//#define
brecev(*(base address of PIT +0x2)) /*base
receiver*/
/*
The above addresses are not yet correct and will be defined at the
begining of this program, but for now are here as reminders. */
flushall();
printf("Is
the car home? 1 for yes, 0 for no\n");
scanf("%d",&carhome);
/*
btrans=sound(440);
// For now the signal will be a 440Hz signal
delay(500);
// of duration 500ms.
btrans=nosound();
if
(brecev==sound(500))
// Until we figure this out, the mask will be a
// frequency addition of 60Hz
carhome=1;
*/
return (carhome);
}
Back
to the breakdown of the program
void
opendoor()
{printf("Opening
door...");
door=0;
//Door is remembered as open
}
Back
to the breakdown of the program
void
closedoor()
{printf("Closing
door...");
door=1;
//Door is remembered as closed
}
Back
to the breakdown of the program
void
delay(int
delayer)
{clock_t start, finish;
start = clock();
do
{finish = clock();
printf("The
time is: %.0fseconds\r", (finish - start) / CLK_TCK);
}while
((finish - start)<=delayer*1000/12); //for
real time in seconds, multiply by 1000
}
Back
to the breakdown of the program
void
leavegar(void)
{
/* Sequence for car leaving the garage */
clock_t beg,
end;
beg=clock();
if (A==1)
//Movement inside garage, may be car...Have a look.
{printf("Car
is inside & movement inside, looking if car is turned on\n");
carhome=scancar();
//Send a message out, if message recieved, then decode it.
if (carhome==1
&& door==1)
// Car is detected and door is closed, open door
{opendoor();
beg=clock();
printf("car
maybe leaving\n");
mcarleaving=1;
updatinp();
//wait for inputs to change.
}
//end nested if (carhome==1 && door==1)
else if
(carhome!=1)
updatinp();
//wait for inputs to change.
} // end
if (A==1 && carinside)
else
updatinp();
do
{if (mcarleaving==1
&& C==1)
{mcarleaving=0;
//car is now no longer possible leaving,
carleaving=1;
//it is definitely leaving.
carinside=2;
//car is neither inside or outside, so for now=2,
may use later.
printf("Car
is leaving and no longer maybe leaving\n");
updatinp();
//Waiting for a change in inputs
}
//end if (mcarleaving==1 && C==1)
end=clock();
}while (mcarleaving==1
&& ((end-beg)<=60000/12)); //will be set
to 30sec not 5
if (mcarleaving==1
&& ((end-beg)>=60000/12))
{closedoor();
mcarleaving=0;
printf("Car
is not leaving\n");
updatinp();
}
count=1;
if (B==1
&& carleaving==1)
{
//let car leave
printf("Movement
oustide and car is leaving, waiting for car to leave\n");
carleaving=carinside=0;
//car is now outside and left the garage
updatinp();
if (C==0)
closedoor();
updatinp();
}
// end if (B==1 && carleaving==1)
}
//end void leavegar
Back
to the breakdown of the program
void
entergar()
{if (B==1)
//Movement outside and car not inside garage...Check
if car is home.
{printf("Car
not in garage, movement outside, look for car\n");
carhome=scancar();
//Send a message out, if message recieved, then decode
it.
if (carhome==1
&& door==1)
//If decoded message was good, and door is closed,
then open it.
{opendoor();
mcoming=1;
printf("Car
is home, door is opening\n");
}
//end nested if (carhome==1 && door==1)
updatinp();
}
//end if (B==1 && carinside==0)
else
updatinp();
if (mcoming==1
&& C==1)
//car wants to come back in
{carcoming=1;
mcoming=2;
printf("Car
is coming in\n");
updatinp();
}
if (A==1
&& carcoming==1 && C==0)
{closedoor();
printf("car
has come in\n");
carinside=1;
mcoming=0;
updatinp();
}
}
//end void entergar
Back
to the breakdown of the program
void
updatinp()
{int Atemp,
Btemp, Ctemp;
//to remember input the inputs
Atemp=A;Btemp=B;Ctemp=C;
flushall();
//clears all input buffers
printf("enter
in values for A, B, C \n"); //asks
the user for the inputs
scanf("%d %d
%d",&A, &B, &C);
//get the inputs from the user
if ((Atemp==A)&&(Btemp==B)&&(Ctemp==C))
//if the inputs don't change
updatinp();
// Keep checking the inputs until they change.
}Back
to the breakdown of the program
void
notmovin()
{
if (A==1
&& carinside==0)
//Car isn't home & movement in garage
{
//state=0; //or sound alarm (To start with...do
nothing)
printf("Someone
is triggering the sensor inside...but car is not inside.\n");
updatinp();
}
if (B==1
&& carinside==1)
//Movement outside but car is inside...Do nothing.
{printf("Car
is inside and movement outside.....Doing nothing\n");
updatinp();
// state=0; //donothing state
}
//end if(B==1 && carinside==1)
}Back
to the breakdown of the program
