BTL-VXL K56 Group 3

HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY

Department of Electronics and Telecommunication

====o0o====

REPORT

MICROPROCESSOR

PROJECT: INDOOR DEVICE

CONTROLLER CIRCUIT

Group: 03 APEEE2 20132

ng Hng Anh

Thanh Tng

Trn Hng Hi

L Kh Linh

20111105

20112133

20111021

20111779

Instructor: ASSOC PROF. DR. PHM NGC NAM

Hanoi, 6/2014

Microprocessor report 2014

2

HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY

Department of Electronics and Telecommunication

====o0o====

REPORT

MICROPROCESSOR

PROJECT: INDOOR DEVICE

CONTROLLER CIRCUIT

Group: 03 APEEE2 20132

ng Hng Anh

Thanh Tng

Trn Hng Hi

L Kh Linh

20111105

20112133

20111021

20111779

Instructor: ASSOC PROF. DR. PHM NGC NAM

Hanoi, 6/2014


3

Evaluation Criteria Score

0. Total Score 10.0

1. Minus

1.1. No product

1.2. No hardware report

1.3. Lack of function: Sign in from keypad

1.4. Lack of function: Display password/Sign in status on LCD

1.5. Lack of function: Warnning when sign in wrong 2 times

1.6. Lack of function: Changing password

1.7. Lack of function: Display date, time on LCD

1.8. Lack of function: Alarm turn off LED

1.9. Lack of function: Auto turn on/off LED depend on light intensity

1.10. Lack of function: Display temperater on 7 segments

1.11. PCB have no name of group

1.12. A sparsely report/lack of content (name of project/group/content/ requirement of procject/plan/block diagram/code)

2. Bonus

2.1. Beautiful PCB and smart order of components

2.2. Function have a good reaction (sensibility, speed of calcultion, display)

2.3. Function: Using house model to demo system

2.4. Function: Auto turn on LED when peole enter the room by using 2.5. infared sensor

2.6. Having other function

2.7. Code includes ASM code

2.8. Easy to use (large keypad, clear note, simple operation)

2.9. Clear presentation, answered speciality questions

TOTAL:


4

CONTENT

CONTENT .................................................................................................................. 4

LIST OF IMAGES ...................................................................................................... 5

LIST OF TABLES ...................................................................................................... 5

PREFACE ................................................................................................................... 6

I. Project disription ................................................................................................... 7

II. System design ...................................................................................................... 16

III. Conclusion ........................................................................................................... 28

REFERENCE ............................................................................................................ 28

APPENDIX A: MEMBERS ..................................................................................... 28

APPENDIX B: CODE .............................................................................................. 30

APPENDIX C: USER GUIDE ................................................................................. 38


5

LIST OF IMAGES

Figure 1. Block diagram of system

Figure 2. Plan and work distribution

Figure 3. Keypad block

Figure 4. Light sensor block

Figure 5. LM35

Figure 6. Temperature sensor block

Figure 7. Temperature display block

Figure 8. Display block

Figure 9. Clock block

Figure 10. Alarm block

Figure 11. Microcontroller block

Figure 12. Source block

Figure 13. Schematic on Proteus

Figure 14. Schematic on Altium

Figure 15. System layout

Figure 16. Final product

Figure 17. Group 3

LIST OF TABLES

Table 1. System blocks and components

Table 2. Components cost


6

PREFACE

We have used traditional keys and locks for centuries; they have helped

human a lot in protecting their properties. However, the keys can easily be stolen;

anyone with the stolen keys can open doors and access buildings. To avoid that

disadvantage, we introduce our secure electronic lock which is based on a

microcontroller of PIC 16f series. Our locks user interface contains a keypad, a

LCD, a 7-segment LED and an indicating LED. This I/O interface allows the

users to enter the password to unlock the door, change the password, check the

temperature, check or change the date and time, and set-up the sleeping time for

the lamp.As digital technology has evolved dramatically in recent years, devices

like this lock have become cheaper and more reliable than ever. Thus, it can

clearly be seen that houses equipped with digital door locks would soon lead the

trend of the future residency.


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I. Project discription

1.1 Functional requirements

IDLE STATE

o Activated when the lock is not in used

o The LCD displays the current date and time. The first line displays the

date with the format Month Date, Year. The second line displays the

time in the format HH:MM:SS and in the 24-hour system.

o Password must be entered before using any function of the lock.

UNLOCK FUNCTION

o The user presses the Unlock button to activate the door unlocking

function.

o The LCD displays Enter Password: and offers the user enough space

to enter the password through the number keys from number 0 to

number 9.

o The password contains 8 characters and the characters are in numbers

only to reduce the complexity when the user wants to get indoor.

o After finish entering the password, the user presses the OK key to

confirm his password. If the password is correct, the GREEN LED is

turned on and the LCD displays Correct Password on the first line

and Welcome home on the second line for 5 seconds before returning

to idle state displaying date and time. If the password is not correct, the

lock notifies the user by displaying Wrong Password on the first line

and Try again on the second line for 3 seconds, then return to the

enter password stage. If the user continues to enter a wrong password,

the alarm is activated, the RED LED is turned on and all the keys are

disabled for 15 seconds. After that, the lock returns to idle state and

displays date and time.

MENU KEY: The user presses the Menu key to go through the list of

available additional functions. Each time the key is pressed, the LCD


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displays the next function. When the last function is reached, the next thing

to be displayed is the first function. Each function are displayed on the

LCD:

o Change Password (1st line) 1/4 (2nd line)

o Change DateTime (1st line) 2/4 (2nd line)

o Setup Timer (1st line) 3/4 (2nd line)

o Reset Timer (1st line) 4/4 (2nd line)

The user presses the OK key when any function is displayed to activate

that function.

CHANGE PASSWORD FUNCTION

o When the Change password function is activated, the lock asks for

the old password. The LCD display Old password? (1st line) and

leave the second line for entering the old password.

o Finishing entering the old password, the user presses OK to confirm.

o If that was a wrong password, the LCD displays Wrong Password

(1st line) and Enter again (2nd line) for 3 seconds before return to the

enter password stage.

o If the password is incorrectly typed twice, the alarm is activated, the

RED LED is turned on, the LCD displays Warning!! and the keypad

is disabled for 15 seconds before getting back to the idle state

displaying date and time.

o If the old password is correctly entered, the lock asks for the new

password by displaying on the LCD New password? (1st line) and the

second line for entering the new password.

o After the user presses OK to confirm the new password, the lock asks

the user to confirm the new password by entering again. LCD displays

Please reenter.

o If the user reenters correctly, the LCD displays Success! for 3

seconds before getting back to idle state. If the user reenters incorrectly,

the LCD displays Mismatch! for 3 seconds and the lock gets back to


9

the idle state.

CHANGE DATE-TIME FUNCTION

o When the Change Date function is activated, the lock asks for the

new date. The LCD display Enter new date (1st line) and

yyyy/mm/dd (2nd line). As the user starts to enter the date, the format

on the second line disappears. The lock automatically adds the / after

the user enters the year and month.

o Finishing entering the date, the user presses OK to confirm.

o The lock then asks for the new time by displaying on the LCD New

time? (1st line) and hh/mm/ss (2nd line).As the user starts to enter

the time, the format on the second line disappears. The lock

automatically adds the / after the user enters the hour and minute.

o Finishing entering the time, the user presses OK to confirm.

o The lock displays on the LCD Done! (1st line) for 3 seconds then

returns to idle state.

SLEEP TIMER FUNCTION

o When the Setup timer function is activated, the lock asks for the

amount of time the user wants to set.

o The LCD display Enter sleep time (1st line) and hh/mm/ss (2nd

line). As the user starts to enter the date, the format on the second line

disappears. The lock automatically adds the / after the user enters the

year and month.

o Finishing entering the sleep, the user presses OK to confirm. The lock

then turns on the indoor light and returns to idle state.

o After the time entered passes, the lock automatically turns off the

indoor light.

RESET TIMER FUNCTION

o When the Reset timer function is activated, if the time is not already

set up, the LCD displays Timer not set. If the time is already set, the


10

LCD display Are you sure? (1st line) and OK to confirm (2nd line).

o If the user presses OK, the setup timer cancels the sleep time and the

lock returns to idle state.

OTHER FUNCTIONS

o At any point in using the lock, the user can press the Return button on

the keypad to cancels whatever he is doing and return the lock to idle

state.

o The lock displays the temperature by using 4 7-segment LEDs. The first

two is for the value of the temperature. The third is for the degree

sign and the fourth is for displaying C.

o Depending on the natural light around. If the surrounding environment

is bright enough, the outdoor light is turned off. If the surrounding

environment is dark, the outdoor light is turned on.

1.2 Nonfunctional requirements

Use the PIC 16F series.

Use the sticky keypad.

Use light sensor to determine the light intensity of the room.

Use temperature sensor to determine the temperature of the room.

Code includes both ASM code and C code.

PCB has group name and members.

Circuit is compact, components are arranged logically.

User interface has to be nice and friendly.

The device costs no more than 150.000VND

The measurements of the device is no bigger than: 210 297 (mm)

Use LEDs to represent the indoor light and outdoor light.


11

1.3 Block diagram of system

Microcontroller

Keypad Light SensorTemperature

Sensor

LCD7-

segment LEDs

Indoor LED

Outdoor LED

AlarmRed/

Green LEDs

Source

Figure 1. Block diagram of system


12

Blocks Components

Keypad Sticky 4x4 keypad

LCD 16x2 LCD

Temperature Sensor LM35

Light Sensor Photo-resistor CDS

12MM

Microcontroller PIC 16f877a

Alarm Buzzer 3V

9.5MMx12MM

LEDs 7-segment LED 0.8

Anode, 5 mm LEDs

Clock DS1307

Source 9V battery

Table 1. System blocks and components


13

Table 2. Components cost

Components Cost (VND)

Sticky 4x4 keypad 10.000

16x2 LCD 60.000

Photo-resistor CDS 12MM 2.000

74HC595 4.000

Microcontroller PIC 16f877a 65.000

Buzzer 3V 9.5MMx12MM 5.000

7-segment LED 0.8 Anode, 5 mm LEDs 4x2.500

DS1307 3.000

Resistors 4.000

9V battery 12.000


14

1.4 Plan and work distribution


15

Figure 2. Plan and work distribution


16

II. System Design

2.1 Keypad block

Figure 3. Keypad block

Keypad consists of 4 columns and 4 rows, and whenever the user taps one button,

the column and the row corresponding to that button are shorted. For example, if

button 7 is pressed, its corresponding column and row (col1 and rowA) are

shorted, if a button 0" is picked, col2 and rowD are shorted, and so on. To detect

whether which input is pressed, a microcontroller uses a method called Scanning.

The columns here are set as outputs and row as inputs (or vice versa).


17

2.2 Light sensor block

Figure 4. Light sensor block


18

2.3 Temperature sensor and temperature display block

For the purpose of measuring the temperature of the environment, LM35 is used

as temperature sensor. The construction of LM35:

Figure 5. LM35

LM35 has 3 legs: 1 for U, 1 for Ground and 1 for output. This sensor interfaces

with PIC follow the path LM35 - > ADC - > Microcontroller. We have the equation

that performs the relationship between the temperature of the environment and the

output voltage of ADC

U =

Where,

U is the output voltage

T is the temperature of the environment

K is the coefficient of LM35, often 10mV/1C


19

Figure 6. Temperature sensor block

In our circuit Vcc=5V

Display temperature by using 7-segment LEDS:

For the porpose transform information from Pic to 7 led segments we use 74595

LED-7 Segment will be used to display the temperature with the help of IC

74HC595. 74HC595 is a shift register chip which connected in serial for input and

parallel for output. The main benefit is saving pins of the microcontroller

(maximum is 3 pins). To do that, pin Q7 of the previous IC will connect with pin

DATA (pin 14) of the following IC. By that method, we can expand the number of

pins of microcontroller as much as we would like to.


20

Figure 7. Temperature display block


21

2.4 Display block

Figure 8. Display block

The LCD would be used in 4-bit mode thus pin D0, D1, D2, D3 are not needed and

connected to the ground.

The variable resistor sets the contrast for the display.

The 1k resistor sets the intensity of the backlight of the display.

2.5 Clock block

Figure 9. Clock block

The two 4.7k resistors are pull-up resistors for the I2C pins


22

2.6 Alarm block

Figure 10. Alarm block


23

2.7 Microcontroller block

Figure 11. Microcontroller block

Switch S1 is used as the reset button.

Switch S2 is used to implement the external interrupt which enables the keypad


24

2.8 Source block

Figure 12. Source block

We ues IC LM7805 to convert 12V to 5V.


25

2.9 Schematic

Figure 13. Shematic on Proteus

Figure 14. Schematic on Altium


26

2.10 System Layout

Figure 15. System layout


27

2.11 Final product

Figure 16. Final product


28

III. CONCLUSION

Reference

K54 Teaching Assistants weekly instructions

Datasheets of : PIC 16F877a, 74HC595, DS1307, Anot common 7 segments,

LCD 16x2 (HD44780U Controller/Driver)

APPENDIX A: THE CONTRIBUTION OF EACH

MEMBER

A.1. ng Hng Anh

Coding LCD library; designing display block; coding the date time, password

functions; assembling code and schematic; participating in PCB designing and

soldering process; editing the report.

A.2. Thanh Tng

Coding keypad library; designing keypad block; assembling code and schematic;

main PCB designer; participating in soldering process; editing the report.

A.3.Trn Hng Hi

Coding DS1307 library; designing clock block and light sensor block; assembling

code and schematic; participating in PCB designing; main solderer; editing the

report.

A.4.L Kh Linh

Coding temperature sensor library; designing temperature sensor and temperature

display block; assembling code and schematic; participating in PCB designing and

soldering process; main report editer.


29

Figure 17. Group 3


30

APPENDIX B: SOFTWARE CODE

//Main

#include

#device *=16 adc=10

#fuses HS,NOWDT,NOLVP,NODEBUG,PUT,NOBROWNOUT

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#use i2c(Master,fast,sda=PIN_A1,scl=PIN_A0)

#use delay(clock=20000000)

#use fast_io(d)

#use fast_io(c)

#use fast_io(b)

#use fast_io(a)

int1 enable_keypad=0;

#int_ext

void enableKeypad()

{

enable_keypad=1;

}

//Time is initalized here

full_time initTime()

{

full_time time;

time.year = 12;

time.month = 2;

time.day = 6;

time.date = 28;

time.hour = 23;

time.minute = 59;

time.second = 57;

return time;

}

void main()

{

set_tris_D(0xF0);

set_tris_C(0x00);

set_tris_B(0x01);

set_tris_A(0x01);

setup_adc_ports(AN0);

setup_adc(ADC_CLOCK_INTERNAL);

set_adc_channel(0);

output_low(PIN_B1);

LCDinit();

LCDclear();

LCDformatSetup();

delay_ms(2);

time = initTime();


31

DS1307init(time);

sleep_time.hour=-1;

int16 TEMPERATURE;

ext_int_edge(H_TO_L);

enable_interrupts(int_ext);

enable_interrupts(GLOBAL);

while(TRUE)

{

resetState();

if (enable_keypad)

{

LCDclear();

LCDgotoXY(1,1);

str="Keypad";

LCDwriteStr(str);

LCDgotoXY(2,1);

str="Activated!";

LCDwriteStr(str);

while (true){

scanButton(state);delay_ms(50);

if (state[0] == 0){

if ((state[1]==3) && (state[2]==7))

{

delay_ms(200);

succ=1;

unLock(succ);

if (!succ) menu();

break;

}

else if ((state[1]==3) && (state[2]==4))

{

toggleLed();

break;

}

else if ((state[1]==1) && (state[2]==7))

{

delay_ms(200);

unLock(succ);

break;

}

}

}

enable_keypad=0;

LCDclear();

LCDgotoXY(1,1);

str="Keypad";

LCDwriteStr(str);

LCDgotoXY(2,1);

str="Deactivated!";

LCDwriteStr(str);

delay_ms(500);

LCDclear();

}

time = DS1307read();

turnOffLed(sleep_time.hour,sleep_time.minute,sleep_time.second);

LCDformatSetup();

sendTimeToLCD(time);

TEMPERATURE=UPDATE_TEMPERATURE();

PUSH_TO_LED(TEMPERATURE);

}


32

}

=================================================================================

//Function for unlocking by entering password

void unLock(int1 *succ)

{

int count=0;

int8 wrong_try=0;

int i;

int1 pass_match=1, complete=0;

char entered_pass[8];

int star_code[8]={0,0,1,0,1,0,1,0};

succ=1;

while (!complete)

{

pass_match=1;

count=0;

unLockSetup();

while (count


33

}

LCDclear();

}

}

=================================================================================

//Function for changing password

void changePassword()

{

int count=0;

int i;

int1 pass_match=1, complete=0;

char entered_pass[8];

char reentered_pass[8];

while (!complete)

{

pass_match=1;

count=0;

changePassSetup();

while (count


34

else if ((state[1]==1) && (state[2]==6)) {reentered_pass[count]='6';}




else if ((state[1]==0) && (state[2]==7)) { LCDclear();

LCDcursor(0,0);return;}

count+=1;

LCDwrite(star_code);

}

resetState();

delay_ms(600);

}

for (i=0;i


35

=================================================================================

//Function for setting sleeptime

void setUpSleepTime()

{

int count=0;

int entered;

sleepTimeSetup();

while (count


36

=================================================================================

//Function for scanning the keypad

void scanButton(int* state)

{

int i,j;

for (i=0;i


37

=================================================================================

//Function for initializing the LCD

void LCDinit()

{

int i;

int init_array[3][10]={

{0,0,0,0,1,0,1,0,0,0},

{0,0,0,0,0,0,1,1,0,0},

{0,0,0,0,0,0,0,1,1,0}

};

output_high(E);

output_bit(RS,0);

output_bit(RW,0);

output_bit(D7,0);

output_bit(D6,0);

output_bit(D5,1);

output_bit(D4,0);

output_low(E);

delay_ms(100);

for (i=0;i


38

incorrectly 3 times

=================================================================================

//Change password library

void changePassSetup() // Function for setting the changing password screen

void confirm() // Function for confirming the password

=================================================================================

//DS1307 library

full_time DS1307read() //Function for reading the date and time from DS1307

int toBCD (int num) //Function for converting a interger num into a BCD

int toBIN (int num) //Function for converting a integer num into binary

=================================================================================

//LCD library

void LCDformatSetup() //Function for setting up the format of LCD

void LCDgotoXY(int x,y) //Function for jumping to a position (x,y) on the LCD

void LCDwriteStr(char* str) //Function for writing a str onto the LCD

void LCDclear() //Function for clearing the LCD

void LCDcursor(int on,int blink) //Function for controlling the cursor: enable

and blink

=================================================================================

//Keypad library

void voltageLow(int8 index) //Function for setting low voltage to a row

int1 isLow(int8 index) //Function for checking if a row is pulled low

APPENDIX C: USER GUIDE

To use the keypad, push the active keypad button.

When keypad is activated:

o Press B to active the unlock function. Then enter password (8 numbers)

to unlock.

o Press * to toggle the indoor LED.

o Press D to enter the functions menu by entering the password. Scroll

through the menu by pressing D. Choose the desired function by pressing

#.

o When a function is activated, only use the number keys to enter required

information (time, password) or press A to cancel.

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