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1. 9 9 86 amp 3 AZ B RADA 5 F t i w 8 972068wuvYG6tEf viaBxu PIL DEVICES CRYSTAL DIPSW 5 KEYPAD SMALLCALC LMOT8L MINRES10K MOTOR STEPPER PIC16F877A ULN2803 gt 1 NoMessage Root sheet 1 Figure 3 3 Proteus simulation program 3 3 MikroC PRO for PIC The mikroC PRO for PIC is a powerful feature rich development tool for PIC microcontrollers It is designed to provide the programmer with the easiest possible solution to developing applications for embedded systems without compromising performance or control 8 PIC and C fit together well PIC is the most popular 8 bit chip in the world used in a wide variety of applications and C prized for its efficiency is the natural choice for developing embedded systems MikroC PRO for PIC provides a successful match featuring highly advanced IDE ANSI compliant compiler broad set of hardware libraries comprehensive documentation and plenty of ready to run examples 8 r a 1 9 mikroC PRO for PIC C Users TOSHIBA Desktop Rabab rabab lastut 0 File Edit View Project Run Tools Help D 4 6 X a BS tae 30 iP RPP AID BR 8 84167631 io ws EG gt i 10244768 Boe aga ig B sbit LCD D6 at RB2 bit 2 5 sbit LC2. 20 Figure 4 10 Initial state of 29 Figure 4 11 system waiting password from keypad 30 Figure 4 12 Entering password to system from keypad 30 Figure 4 13 Motor is activated in order to unlock the door 31 Figure 4 14 Motor is activated in order to lock the door 31 Figure 4 15 system waiting password from Mobile 32 Figure 4 16 system message when entered password is wrong 33 Figure 4 17 Overall system and desired output 33 List of Tables Table Name Pages No Table 3 1 DTMF keypad frequencie H 19 Table 3 2 Digit COGHIS let rta eun sands Ante eh teta 19 Table 3 3 Four different steps of stepper motor 21 Table 3 4 Connect keypad 2 4 22 Table 3 6 LCD 16 2 Pin 23 ANSI CISC CPU DTMF EMF IDE LCD LD OACS PIC RISC List of Abbreviations American National Standards Institute Complex Instruction Set Computing Central Processing Whit Dual Tone Multiple Frequency Electromotive Force Input Output Integrated Development Environment Liquid Crystal Display Loop disconnect Office Access Control System Programmable Interface Controller Reduced Instruction Set Computing Chapter One Introduction Cha
3. Flow KEY TOE Q4 Q2 Qi 697 1209 1 H 010190 1 697 1336 2 H 01011 0 697 1477 3 H 01011 1 770 1209 4 H 011100 770 1336 5 H 0 110 1 770 1477 6 H 011 1 0 852 1209 7 H 011 1 1 852 1336 8 1 0 0 0 852 1477 9 H 11010 1 941 1209 0 11011 0 941 1336 11011 1 941 1477 H 1 11010 697 1633 A H 1 110 1 770 1633 B H 1 1 1 0 852 1633 C H 1 1 1 1 94 1633 D H 0 0 0 0 19 3 7 Stepper Motor As the name implies the stepper motor moves in distinct steps during its rotation Each of these steps is defined by a Step Angle In the example above you may notice that there are 4 distinct steps for the rotor to make a complete 360 degree rotation This defines the steep angle at 90 degrees 11 We can say that a stepper motor is actually a digital motor This characteristic makes it very suitable for digital interfaces such as with a microcontroller 11 stepper motor Figure 3 9 Stepper motor As the stepper motor operates at 12V the standard transistor circuit is required to switch each coil As the coils create a back EMF when switched off a suppression diode on each coil is also required 11 3 8 1 Motor Drive ULN2803 Interface to PIC16F877A Fortunately the Darlington driver IC ULN2803 can be used to provide both the NOT and Darlington driver circuits It also contains the back EMF su
4. 10 Figure 3 2 System Flor Catan 11 Figure 3 3 Proteus simulation 12 Figure 3 4 MikroC program for PIC sese 13 Figure 3 5 Circuit diagram of the door lock controller 15 Figure 3 6 PIC k150 programmer Suo bx tere tiende 16 Figure 3 7 Functional Block Diagram of 8870 17 Figure 3 8 MT8870 Single Ended Input Configuration 18 Figure 3 9 Stepper motor qs Les eee 20 Figure 3 10 ULN 2803 interface to stepper motor 21 Figure 3 11 Keypad Fl agere 22 Figure 3 12 LCD 16 2 Pin Diagram eorom ende 23 Figure of Result in Simulation program Figure 4 1 System design in proteus program 24 Figure 4 2 Initial state of system 24 Figure 4 3 system waiting password from keypad 25 Figure 4 4 Entering password to system from keypad 25 Figure 4 5 Motor is activated in order to unlock the door 26 Figure 4 6 Motor is activated in order to lock the door 26 Figure 4 7 system waiting password from Mobile 27 Figure 4 8 system message when entered password is wrong 28 Figure of Results of hardware construction Figure 4 9 System hardware
5. 8 8 ra a columns Figure 3 11 Keypad 4 4 Table 3 4 Connect keypad in PORTD ra 4x4 Matrix 6 Lines Lines ROW 0 PORTD 0 ROW 1 PORTD 1 ROW PORTD 2 ROW 4 PORTD 3 COLUMN 0 PORTD 4 Column GO UMN 1 PORTD 5 Rows COLUMN 2 PORTD 6 COLUMN 3 3 9 Interfacing LCD with Microcontroller Liquid Crystal Display LCD is an electronic display module and find a wide range of applications 16x2 LGD display is very basic module and is very commonly used in various devices and circuits 13 A PIC Microcontroller can be easily made to communicate with LCD by using the built in Libraries of MikroC Interfacing between PIC and LCD can be 4 bit or 8 bit 14 In this project 4 bit mode is used 4 bit mode uses only 4 data lines which are sending sequentially through data lines DB4 DB7 The idea of 4 bit communication is to save as much pins that used to interface microcontroller with LCD The 4 bit mode data transmission is most commonly used 14 Table 3 5 LCD 16 2 Pin Description 3 Contrast adjustment through a variable resistor Sends data to data pins when a high to low pulse is given 4 bit data pins 3 NE AT Backlight Vcc 5V Backlight Ground 0V 23 Chapter Four Results and discussions Chapter Four Results Results and discussions 4 1 Simulation Results and discussions The system design in prote
6. if PORTa f0 0 amp amp PORTa f1 0 amp amp PORTa f2 0 amp amp PORTa f3 1 if the INPUT 8 return 8 if PORTa fO 1 amp amp PORTa f1 0 amp amp PORTa f2 0 amp amp PORTa f3 1 if the INPUT 9 return 9 if PORTa f0 0 amp amp PORTa f1 0 amp amp PORTa f2 1 amp amp PORTa f3 1 if the INPUT return if PORTa f0 1 amp amp PORTa f1 1 amp amp PORTa f2 0 amp amp PORTa f3 1 if the INPUT return if PORTa f0 0 amp amp PORTa f1 1 amp amp PORTa f2 0 amp amp PORTa f3 1 if the INPUT return 0 Appendix B PIC 16F877A Data Sheet MICROCHIP PIC16F87XA Data Sheet 28 40 44 Pin Enhanced Flash Microcontrollers 40 Pin PDIP MCLR VPP 11 RA1 AN1 3 RA2 AN2 VREF CVREF 4 RA3 AN3 VREF 15 RAA TOCKI C1OUT 16 RASI ANA SSIC2OUT 7 40 T RB7 PGD 39 J REO RD AN5 8 RBO INT RE1ANR ANG6 9 4 VDD RE2 CS AN7 10 4 Vss Voo 11 7 Vss 12 RD6 PSP6 OSC1 CLKI 13 OSC2 CLKO 4 14 PIC16F874A 877A 05 4 RCO T1OSO T1CKl 115 RCTIRXDT RC4 T1OSI CCP2 16 RC6 TX CK g RC2 CCP1 117 00 52 RC3 SC
7. 7 case 10 kp 56 break 8 case 11 kp 57 break 9 case 12 kp 67 break C for 4x4 pad case 13 kp 42 break case 14 kp 48 break 0 case 15 kp 35 break case 16 kp 68 break D for 4x4 pad if i 0 Lcd Cmd LCD CLEAR code1 i kp Lecd Chr 2 i 1 1 1 Print key ASCII value on Lcd Lcd Chr 2 i 1 Print key ASCII value on Lcd i void main kp Keypad Init Initialize Keypad TRISC 0x00 PORTC 0x00 TRISD 0x00 PORTD 0x00 ADCON1 0X07 A D converter PORTA OXFF TRISA OXFF PORTB OXFF TRISB OXFF Lcd Init Initialize LCD Lcd Cmd LCD CLEAR Clear display Lcd Cmd LCD CURSOR OFF Cursor off do I Lcd Out 1 1 1 From keypad Lcd Out 2 1 2 From Mobile Lcd Cmd LCD CURSOR OFF kp Keypad Key Click if kp 1 Lcd Cmd LCD CLEAR clear display Lcd Out 1 1 Enter Password Lcd Out 2 4 from keypad Lcd Cmd LCD CURSOR OFF i 0 code enter code enter code enter code enter code enter Compare Password j if kp 2 Lcd Cmd LCD CLEAR clear display Lcd Out 1 1 Enter Password Lcd Out 2 4 From Mobile Cmd LCD CURSOR OFF k 0 for k 0 k lt 5 k Temp Password DTMF k 2get key Compare Password while 1 int Compare Password char password int Compare Password in
8. RA5S AN4 SS C2OUT RA5 AN4 SS C2OUT RBO INT RBO INT Digital I O Analog input 3 A D reference voltage High input Digital I O Open drain when configured as output TimerO external clock input Comparator 1 output Digital I O Analog input 4 SPI slave select input Comparator 2 output PORTB is a bidirectional I O port PORTB can be software programmed for internal weak pull up on all inputs Digital I O External interrupt mr pem 1 Digital I O EN 12 Digital I O Low voltage ICSP programming enable PGM pin ee ee 5 8 12524161 TR RB6 Digital I O PGC n In circuit debugger and ICSP programming clock RCO T1OSO T1CKI RCO T10SO RC1 T1OSI CCP2 RC1 T1OSI CCP2 RC2 CCP1 RC2 CCP1 RC3 SCK SCL RC3 SCK SCL RC4 SDI SDA RC4 SDI SDA RC5 SDO RC5 RC6 TX CK RDO PSPO RDO PSPO RD1 PSP1 RD1 PSP1 RD2 PSP2 RD2 PSP2 RD3 PSP3 RD3 PSP3 RD4 PSP4 RD4 PSP4 RD5 PSP5 RDS PSP5 RD6 PSP6 RD6 PSP6 RD7 PSP7 RD7 PSP7 yo Digital I O VO In circuit debugger and ICSP programming data PORTC is a bidirectional I O port Digital I O Timer1 oscillator output Timer1 external clock input Digital I O Timer1 oscillator input Capture2 input Compare2 output PWM2 output Digital I O Capture1 input Compare1 output PWM1 Digital I O Synchronous serial clock input o
9. Third the color will be changed when one of the keys button is pressed or 5s had elapsed without any key pressed 3 A Private Office Access Control System OACS was designed by Sadeque Reza Khan 4 This is a flexible and low cost modular system based on integration of keypad magnetic lock and a microcontroller is used as a main controller The main controller obtains a user password from a keypad If the password is correct then it will permit the access of a valid user by controlling an electromagnetic door lock For an invalid password the system will stack and blow protection alarm 4 2 3 PIC Microcontrollers Microcontrollers are single chip computers consisting of Central Processing Unit CPU data and program memory serial and parallel input output I O etc 5 Microcontrollers are programmed devices A program is a sequence of instructions that tell the microcontroller what to do 5 Programmable Interface Controller PIC microcontrollers are manufactured in different sizes and in varying complexity These microcontrollers incorporate Reduced Instruction Set Computer RISC architecture and there is only a small set of instructions that the user has to learn Also the power consumption of PIC microcontrollers is very low and this is one of the reasons which make these microcontrollers popular in portable hand held applications 6 Chapter Three System Design Chapter Three System Design The proje
10. alert the occupants of the premises when the access point is open or someone tries to be gain access References References 1 Raj Jain A Survey of Biometrics Security Systems http www cse wustl edu jain cse57 1 1 1 ftp biomet index html accessed on 7 March 2014 2 Rachit Saini Jerry Shim Qi Zhao alternative house security system in March 2014 https courses engr illinois edu ece445 projects asp term 120128 accessed on 19 April 2014 3 Then Dao Hui Microcontroller Based Lock Using Color Security Code in June 2013 http www scribd com doc 188071886 Microcontroller based Lock Using Colour Security Code scribd accessed on 25 April 2014 4 Sadeque Reza Khan Office Access Control System OACS International Journal of Embedded Systems and Applications IJESA June 2012 http arnetminer org publication development of low cost private office access control system oacs 3594050 html accessed on 25 February 2014 5 Dogan Ibrahim PIC BASIC Projects 30 Projects Using PIC BASIC and PIC BASIC PRO Linacre House http elsevier com locate permissions accessed on 25 February 2014 6 Martin Bates introduction to Microelectronic system The PIC16F877A Microcontroller system security Elsevier Newness October 2000 http pic microcontroller com pic microcontrollers an introduction to microelectronics by martin bates e book accessed on 15 March2014 7 Proteus software http geniusdevi
11. logic low when the voltage on St GT falls below Vrsi Early Steering Output Presents a logic high once the digital algorithm has detected a valid tone pair signal condition Any momentary loss of signal condition will cause ESt to return to a logic low MT8870D MT8870D 1 Data Sheet Pin Description 17 0 SUGT Steering Input Guard time Output Bidirectional A voltage greater than Vrs detected at Description St causes the device to register the detected tone pair and update the output latch A voltage less than Vrs frees the device to accept a new tone pair The GT output acts to reset the external steering time constant its state is a function of ESt and the voltage on St Positive power supply Input 5 V typical 1
12. operating voltage is 4 0 5 5V industrial temperature range 40 to 85 C 15 Interrupt Sources 35 single word instructions single cycle instructions except for program branches two cycle Flash Memory 14 3 Kbytes 8192 words Data SRAM 368 bytes Data EEPROM 256 bytes Self reprogrammable under software control In Circuit Serial Programming via two pins 5V Watchdog Timer with on chip RC oscillator Programmable code protection Power saving Sleep mode Selectable oscillator options In Circuit Debug via two pins 33 I O pins 5 1 0 ports 13 5 Data Bus PORTA mH rogram pe mea RAQ ANO Flash RAT AN1 Program RA2 AN2 Vrer CVREF 8 Level Stack naL RAVANNVREF 13 4 100 ied RAS AN4 SS C20UT Program pus 14 RAM dl RB INT C RB2 Direct Addr 7 Indirect 81 R84 FSRreg RB5 RB6 PGC 4 40 PORTC RCO TTOSO TICKI Power up 1 105 2 RC2ICCP1 Instruction Oscillator REL code eG tart up Timer iced Control RC5ISDO Foweron RCBITXICK RCTIRX DT K Lo Watchdog K Generation Timer PORTD OSCT CLK Brown out RDOPSPO OSC2 CLKO Reset RDI PSP1 In Circuit RD2PSP2 ebugger N RD3 PSP3 Low Voltage OUS Programming RDS PSP5 RD6 PSP6 7 MCLR Ves REO RDIANS RETANRIANE RE2ICSI
13. user requesting entrance will then be granted access to the premises When door is turn to close it will press the reset button so the system will close the lock and LCD will display Door locked If the password is wrong when entered from keypad or remotely the LCD will display sorry wrong password as shown in Figure 4 8 Figure 4 8 System message when entered password is wrong 28 4 2 Results of Hardware construction The system hardware design is shown in Figure 4 9 Figure 4 9 System hardware design Initially the LCD will display two options 1 is enter password from keypad 2 is enter password from mobile phone as shown in Figure 4 10 Figure 4 10 Initial state of system 29 If 1 entered this message will be displayed on LCD Enter password from keypad as shown in Figure 4 11 Figure 4 11 System waiting password from keypad For security purposes the password is displayed as stars as it is the convention in such systems This is illustrated in Figure 4 12 Figure 4 12 Entering password to system from keypad 30 If the correct password is entered the motor door lock will be activated in order to unlock the door This is display Lock Open on the LCD as shown in Figure 4 13 Figure 4 13 Motor is activated in order to unlock the door Then the door will close the motor door lock will be activated in order to lock
14. ANT Parallel Timerd Timert Timer2 10 b A D Slave Port 1 1 1 I T T 1 Synchronous Voltage Data EEPROM CCP1 2 Port USART Comparator Reference PIC 16F877A Block Diagram PDIP PLCC TGFP Buffer HER OSC1 CLKI OSC2 CLKO OSC2 CLKO MCLR VPP MCLR VPP RAO ANO RAO ANO RA2 AN2 VREF CVREF 13 14 30 32 ST CM 5 OSC1 4 Oscillator crystal or external clock input Oscillator crystal input or external clock source input ST buffer when configured CLKI in RC mode otherwise CMOS External clock source input Always associated with pin function OSC1 see OSC1 CLKI OSC2 CLKO pins Oscillator crystal or clock output Oscillator crystal output Connects to crystal or resonator in Crystal Oscillator mode In RC mode OSC2 pin outputs CLKO which has 1 4 the frequency of OSC1 and denotes the instruction cycle rate Master Clear input or programming voltage output Master Clear Reset input This pin is an active low Reset to the device Programming voltage input PORTA is a bidirectional I O port Digital I O Analog input 0 RA1 AN1 3 4 20 20 TTL RA1 Digital I O AN1 Analog input 1 4 5 21 21 TTL RA2 Digital I O AN2 Analog input 2 VREF 0 A D reference voltage Low input CVREF Comparator VREF output 5 22 22 TTL RA3 AN3 VREF VREF RA4 TOCKI C1OUT RA4 TOCKI C10UT
15. D D7 at RB3 bit sbit LCD RS Direction at TRISB4 bit sbit LCD EN Direction at TRISB5 bit sbit LCD D4 Direction at TRISBO bit sbit LCD D5 Direction at TRISB1 bit sbit LCD D6 Direction at TRISB2 bit sbit LCD D7 Direction at TRISB3 bit w ma af sbumes patosa uj void porta Jenter t void code_enter keypad init oldstate 0 1 1 yy palo 177 351 i jeBeuey kp 0 Reset key code variable 30 vait for key to be pressed and released do kp Keypad Key Press store key code in kp variable kp Keypad Key Click store key code in kp variable while kp 9 EE Messages Quick Converter v Errors Warnings Hints Line Message No Message Text Unit 2 0 1143 Used ROM program words 1127 14 Free ROM program words 7065 86 Used ROM pr 0 125 Project Linked Successfully urt mcppi 0 128 Linked in 764 ms 0 129 Project urt mcppi completed 1778 ms 0 103 Finished successfully 30 Nov 2014 00 28 26 urt mcppi B l H 25 14 Insert Compiled CAUsers TOSHIBA Desktop Rabablrabab last urt c Figure 3 4 MikroC program for PIC 3 4 System Circuit Diagram The main control unit is PIC16F877A has five ports A B C D BE Port E is not uselPin this project DTMF MT8870 is interfaced to the main control unit through
16. Design and Implementation of a Remotely Controlled Electronic Door Lock By Rabab Osman Mohammed Said Farh B Sc HONOUR in Telecommunication University of Gezira 2003 A Thesis Submitted to the University of Khartoum as a Partial Fulfillment of the Requirements for the degree of M Sc in Computer Architecture and Networking Supervisor Professor Sharief F Babikir Department of Electrical and Electronic Engineering Faculty of Engineering January 2015 pins aall iaa SIL cll copay gM 5 Dedication To my sister Rihab Osman who supported to do my best in life study work Acknowledgement II Thanks first and last to ALLAAH who enabled me to conduct this study by grace of him and gave me strength For all those who stood by me and helped me in this thesis I send my thanks and deepest gratitude Special and deepest regards to my supervisor Prof Sharief Fadul Babiker for his continuous supports help and patience Last but not least special thanks are to my friends who have shared their opinions and useful information as well as the technical support to me in order to complete the project Abstract This thesis describes the design and implementation of a Microcontroller based s
17. K SCL 18 RCA SDI SDA 9 sof 88 RDOIPSPO 19 RD3 PSP3 55255 amp amp RD1 PSP1 e 20 RD2 PSP2 39550088850 44 PLCC HEL 112111 IL TE TON ONE RAA TOCKI CTOUT 4 TTT Hg a RB3 PGM RAS ANA SSIC2OUT 4 381 2 REO RD AN5 370 4 gt 1 RETAWRIANe 49 RBO INT a 11 PIC16F874A 351 von Ves 5 H12 PIC16F877A 3320 ROIPSPT 0501 0116 321 4 RD6 PSP6 OSC2 CLKO 5 31L 4 RD5 PSP5 RCO T1OSO T1CK1 6 30L 4 RD4 PSP4 NC vaere 7 5 LILILILILILILIL JL JI 8283 584 55556866 535020000457 99555245245 02 02 02 02 02 02 02 02 02 02 2 2 0 9 2 2 0 29 5 c 11111111 Eg d ELTE E E ET D LT DI 2 HHHHHHHHHH C4 0 O 2 277 TOM 0 0 RC7 RX DT lt gt 1 NC RD4 PSP4 2 32m RC T1OSO T1CKI RDS PSP5 C103 31H gt OSC2 CLKO RDS PSP6 TET 3011 4 OsC1 CLKI RD7 PSP7 lt gt 5 PIC16F874A vss Ts VoD __ Voo 007 PIC16F877A 7 gt 26HId 4 9 RE1 WR AN6 RB1 89 25 9 REO RD ANS RB3 PGM LH 11 svoren sex RAA TOCKI CTOUT HHHHHHHHH guES 8502575 85 9 3 10 PIC 16F877A PIC16F877A is 40 pins operating speed is 20 MHz 200 ns instruction cycle
18. Port A A0 A4 as the inputs for the system The keypad is interfaced to the main control unit through Prot B 7 as the inputs for the system A 16 2 LCD is the output for the system that displays the status of the system it interfaces to the main control unit through Prot D D2 D7 A motor drive is the output for the system that represents the lock of the door Motor drive connects to the microcontroller using the integrated circuit ULN2803 ULN2803 interfaces to the main control unit through Prot C C0 C3 Keypad 4 4 OSCTCLKIN OSC2CLHOUT RADAND RATAN1 RAZIANZA REFACVREF RBS RBSPGC RAKTDEKIC10UT RBTPGD RASMNISSEIDUT 22 RCUTIOSO TICKl REIANSRD RC UTIOSICC P2 MEVANDUUR REZIANTICS RC3GCKSCL RC4GSDIGDA HCLRAPPTHV RCSGDO RCSTXCK ROTRXDT RODPSPO RD1PSP1 RD2PSP2 RD3mop3 RDUPSP4 ROSPSPS KUWPSPO RDT PSPT PIC 16F877A LCD 16 2 Figure 3 5 Circuit diagram of the door lock controller 15 3 5 50 Programmer The USB PIC K150 microcontroller programmer is a low cost high performance PIC programmer support most popular PIC chip burning Write read and other functions use a high speed USB communication ultra fast programming programming quality is stable and reliable 9 Figure 3 6 PIC k150 programmer 16 3 6 Dual Tone Multiple Frequency DTMF Dual Tone Multi Frequency signaling is used for telecommunication signaling over ana
19. advantages in this system If the surface of the finger gets damaged and or has one or more marks on it identification becomes increasingly hard Furthermore the system requires the users finger surface to have a point of minutiae or pattern in order to have matching images This will be a limitation factor for the security of the algorithm 1 2 1 3 Voice Recognition There are two main factors which makes a person s voice unique Firstly it is the physiological component which is known as the voice tract Secondly it is a behavioral component which is known as the voice accent By combining both of these factors it is almost impossible to imitate another person s voice exactly and unauthorized users can record authorized users voices and run it through the verification process in order to get user access control to system 1 2 1 4 Iris Scanner amp Recognition The human iris is a thin circular structure in the eyes which is responsible for controlling the diameter and size of the pupils It also controls the amount of light which is allowed through to retinal in order to protect the eye s retina Iris color is also a variable different to each person depending upon their genes Iris color will decide eye color for each individual Iris recognition systems will scan the iris in different ways It will analyze over 200 points of the iris including rings furrows freckles the corona and others characteristics After recording
20. ations 5 1 Conclusions This thesis has presented a low cost door lock system Comparing to other biometrics locks that are based on different authentication method such as fingerprint and eye blinking detection this lock has the advantage on cost basis At the same time it provides a reasonably safe access control mechanism This system is suitable for most outdoor security protection due to the fact that it has high discriminative capability during operation and they are fairly low cost useful system 5 2 Recommendations Instead of using the keypad build on the access point to start remote access which may cause some limitation to this system the system may be directly accessed remotely to be more useful and practical The system could be expanded by integrating a call system with the present system It could be simplified to allow the system to directly call the owner of the password from the access point This removes the requirement that the person requesting access to have a mobile phone The proposed modifications to the system can be developed with minimal costs and with relatively low operational costs The system requires high degrees of security an example when children try to gain access to the home when no one is available at home Some feedback can be added to those who open door remotely about the status of the access point especially when kids access the entry point Different types of alarms can be added to
21. cation process in order to get user access control to system and for many other reason password access control system are useful 1 2 2 Similar Studies Alternative House Security System designed by Rachit Saini Jerry Shim Qi Zhao 2 Design a personal and home security system that requires nothing to carry like keys or cards However the resident himself can activate and enters the home The system prevents a person from getting locked out of their home if they forget to grab their key before leaving The system project was chosen because there are not any non expensive ways to get into the house using biometrics The functions of their security system is doorknob which activate the system by detecting the Height weight Eye blinking unlocking the door if all identifications match 2 Microcontroller Based Lock Using Color Security Code was designed by Then Dao Hui 3 The main objective of this design is to develop a security system that uses the color sequence as authentication method The color of the button to key in the color code is changing randomly It creates a security lock that can reduce the probability of password being stolen by bystander in such a way that the passwords pressed are difficult to be guessed by others nearby Firstly the security lock is aimed to use for door locking system using microcontroller as the controller Secondly there will be at least 3 colors changing randomly for each key of the keypad
22. ct is divided into two parts namely hardware and software Each part will be analyzed separately Proteus simulation program used to design the electronic circuit with microcontroller as the main control unit C code written using MikroC Compiler The code was burned to PIC16F877A using PIC k150 programmer The circuit was designed analyzed and tested The modules considered in this project are the keypad unit mobile phone DTMP unit display unit output motor ULN2803 Motor unit The block diagram of the microcontroller based Electronic door lock is shown below Keypad Display unit unit LCD 16 2 4 4keypad Control unit PIC 16F877A DTMF Stepper motor unit ULN2803 8870 Figure 3 1 Block diagram of the door lock 3 1 System Flowchart If wrong If right If right Figure 3 2 System flowchart 3 2 Introduction to Proteus Software Proteus is best simulation software for various designs with microcontroller It is mainly popular because of availability of almost all microcontrollers in it So it is a handy tool to test programs and embedded designs for electronics hobbyist It is possible to simulate and test programs of microcontroller in Proteus Simulation Software 7 After simulating the circuit in Proteus Software it will be easy to make a PCB design with it so it could be all in one package File View Edit Tools Design Graph Source Debug Library Template System Help 2
23. data from each individual it will save the information in a database for future use in comparing it every time a user want to access to the system 1 2 1 5 Veins Recognition One of the recent biometric technologies invented is the vein recognition system Veins are blood vessels that carry blood to the heart Each person s veins have unique physical and behavioral traits Taking advantage of this biometrics uses unique characteristics of the veins as a method to identify the user Vein recognition systems mainly focus on the veins in the users hands Each finger on human hand has veins which connect directly with the heart and it has its own physical traits 1 2 1 6 DNA Biometrics System One of biometrics technology which is used in security systems recently is DNA biometrics It is impossible to fake this characteristic because each person s DNA is unique Each person s DNA contains some trait from his her parents Each cell in the human body contains a copy of this DNA DNA profiling will decide the amount of VNTR variable number tandem repeat which repeats at a number of distinctive loci These amounts of VNTR will make up an individual s DNA profile 1 Because of time is the negative affective for facial recognition detector for fingerprint reader if the surface of the finger gets damaged it will be difficult to match for Voice Recognition unauthorized users can record authorized users voices and run it through the verifi
24. e main control unit C code will be written using MikroC Compiler the code will be burned to PIC16F877A using PIC K150 programmer the circuit will be designed analyzed and tested The modules considered in this project are The keypad unit Mobile phone DTMF unit display unit output motor ULN2803 MOTOR unit 1 4 Thesis Layout Chapter two Literature Review gives an introduction to door lock system Biometric System Similar Study and PIC Microcontroller Chapter three system design this chapter discusses proteus simulation program mikroC compiler PIC k150 programmer and circuit of the project This chapter discusses all software and hardware that used to build door lock system Chapter four Result this chapter discusses results of the project started with results of simulation in proteus program and results of hardware construction Chapter five conclusion and Recommendations this chapter contains the conclusion that can be drawn from this thesis based on the work introduced by chapter four Also contains some of recommendation to develop this system in the future 2 Chapter Two Literature Review Chapter Two Literature Review Access control security systems are used as selective systems to decide who can access a given location based on a personal distinctive trait of the user From the past time to the present security locks usually include mechanical devices made of forged metal door chain p
25. ecurity system It provides users with an efficient and reliable security system that supports the use of an electronic keypad or mobile phone Dual Tone Multiple Frequency DTMF arranged to send signals to the control unit The system provides the ability to authenticate the user and to on lock the entry point The system was implemented using a microcontroller interfaced to a DTMF decoder together with a stepper motor The system has been successfully tested under normal operating conditions and this system was found to provide the expected functionality al dl Table of Contents Title Chapter One Introduction Background 8 16415 21 DA Le 1 3 Methodology EEE ER EE LA Thesis ola aa Chapter Two Literature Review Int
26. en used in Serial Programming mode 3 This buffer is a Schmitt Trigger input when configured in RC Oscillator mode and a CMOS input otherwise Appendix C ULN2803 TOSHIBA ULN2803 04APG AFWG TOSHIBA Bipolar Digital Integrated Circuit Silicon Monolithic ULN2803APG ULN2803AFWG ULN2804APG ULN2804AFWG Manufactured by Toshiba Malaysia 8ch Darlington Sink Driver 8 ULN2803APG The ULN2803APG AFWG Series are high voltage ULN2804APG high current darlington drivers comprised of eight NPN darlington pairs A l units feature integral clamp diodes for switching inductive loads Applications include relay hammer lamp and display LED drivers Features DIP18 P 300 2 54F Output current single output ULN2803AFWG 500 mA max ULN2804AFWG High sustaining voltage output 50 V min Output clamp diodes Package Type APG DIP 18pin Inputs compatible with various types of logic Package Type AFWG SOL 18pin SOL18 P 300 1 27 Weight DIP18 P 300 2 54F 1 478 g Typ SOL18 P 300 1 27 0 48 g Typ Pin Connection top view 01 02 03 04 05 06 07 08 COMMON Input Base A ULN2803APG AFWG TTL 5 CMOS ULN2804APG AFWG 10 5 kQ 6 15 V PMOS CMOS Appendix D MT8870 MT8870D MT8870D 1 ZARLINK ISO CMOS Integrated DTMF Receiver SEMICONDUCTOR Data Sheet Features May 2005 Complete DTMF Receiver Low power consumption Ordering Information MT8870DE 18 Pin PDIP T
27. eries use digital counting techniques to detect and decode all the 16 DTMF tone pairs into a 4 bit code output The built in dial tone rejection circuit eliminates the need for pre filtering When the input signal given at pin 2 IN in single ended input configuration is recognized to be effective the correct 4 bit decode signal of the DTMF tone is transferred to Q1 pin 11 Q2 pin 12 Q3 pin 13 Q4 pin 14 outputs of the DTMF decoder IC are connected to port pins of microcontroller 10 Figure 3 8 MT8870 Single Ended Input Configuration DTMF keypad is laid out in a 4x4 matrix with each row representing a low frequency and each column representing a high frequency Pressing a single key such as 1 will send a sinusoidal 18 tone for each of the two frequencies 697 and 1209 hertz Hz The original keypads had levers inside so each button activated two contacts The multiple tones are the reason for calling the system multi frequency These tones are then decoded by the switching center to determine which key was pressed 10 Table 3 1 DTMF keypad frequencies with sound clips 1209 Hz 1336 Hz 1477 Hz 1633 Hz 697 Hz 1 2 3 A 770 Hz 4 2 6 B 852 Hz 7 8 9 C 941 Hz 0 D DTMF MT8870 is an IC which converts the numbers at any mobile to the binary number and each number has low and high frequency 10 Table 3 2 Digit coding
28. gure 4 5 Motor is activated in order to unlock the door Then the door will close the motor door lock will be activated in order to lock the door this message will be display Lock Close on LCD as shown in Figure 4 6 ULN2803 Figure 4 6 Motor is activated in order to lock the door If the user has no access to the premise then he she can contact the residents or someone who has access to the building The idea is that the door could be remotely unlocked by supplying the passwords over the phone using the DTMF functionality This is activated by option 2 then it will display enter password from mobile as shown in Figure 4 7 file View Edit Tools Design Graph Source Debug Library Template System Help SU KGL 3 4 9 5 gt EEEN R QAAN 00 H 5 lt 2 BE uja tE 7 ID 7 0 m 7messagets ENIMATING 00 07 58 250000 CPU load 4120 Figure 4 7 System waiting password from mobile So the owner will call the mobile phone that attached with system he she must set the mobile phone in the mode of auto answer when the headset is connect in this mode the phone will auto answer after that the owner will enter the DTMF password remotely The user requesting entrance will then be granted access to the premises The password interring remotely will not be displayed on the LCD for security issue The
29. in tumbler lock jam lock and padlock etc Other recently developed security devices are gadgets like laser beam detectors motion detectors and magnetic card readers Most recent of these devices are offshoots of biometric engineering They include voice recognition systems finger print readers retina eye scanners etc The major characteristic of security devices is to prevent an intruder from gaining access to a location Most of these devices however have lapses and loophole which may give an unauthorized person access to location where they are barred The simple jam lock and pad lock can be forced open or the keys duplicated by unauthorized persons and under certain conditions physical changes of the individual concerned the biometric devices sometimes fail in recognizing the authentic individual concerned Hence they cannot be totally relied on Furthermore these devices are very expensive their use is restricted only to few individuals or organizations that can afford it 2 Biometric System Biometrics is defined as the unique personal physical logical characteristics or traits of human body These characteristics and traits are used to identify each human Any details of the human body which differs from one human to other will be used as unique biometric data to serve as that person s unique identification ID such as retinal iris fingerprint palm print and DNA Biometric systems will collect and store thi
30. log telephone lines in the voice frequency band between telephone handsets and other communications devices and the switching center 10 Dual Tone Multi Frequency or DTMF is a method for instructing a telephone switching system of the telephone number to be dialed or to issue commands to switching systems or related telephony equipment 10 The MT8870 is a complete DTMF receiver integrating both the band split filter and digital decoder functions The filter section uses switched capacitor techniques for high and low group filters the decoder uses digital counting techniques to detect and decode all 16 DTMF tone pairs into a 4 bit code 10 VDD VSS VRef INH Bias Circuit PWDN F gt VRef Buffer Q1 Chip Chip 2 Power Bias Digital Detection Converter Algorithm and Latch Q2 Zero Crossing Detectors Q3 Q4 St Steering Chip Clocks GT Logic OSC1 OSC2 SUGT Est STD TOE Figure 3 7 Functional Block Diagram of MT887 17 External component count is minimized by on chip provision of a differential input amplifier clock oscillator and latched three state bus interface The MT8870 provides full DTMF receiver capability by integrating both the band split filter and digital decoder functions into a single 18 pin The filter section uses a switched capacitor technique for both high and low group filters and dial tone rejection 10 All types of the MT8870 s
31. ls com 2013 03 what is proteus software accessed on 20 March 2014 8 MikroC http www mikroe com download eng documents compiler s mikroc pro pic help introduction to mikroc pro for pic html accessed on 20 March 2014 9 Manual User Manual PIC K150 Programmer www gie com my accessed on 22 March 2014 10 Application Note MSAN 108 Applications of the MT8870 integrated DTMF Receiver www zarlink com accessed on 18 May 2014 11 Stepper Motor http en wikipedia org wiki Stepper motor accessed on 15 June 2014 12 Keypad https iamzxl wordpress com 2013 07 24 4x4 matrix keypad accessed on 6 November 2014 13 Data Sheet LCD 16x2 pdf Electronics Reference Design Library http www engineersgarage com electronic components 16x2 lcd module datasheet accessed on 8 November 2014 14 LCD interfacing with PIC Microcontroller by Ligo George http electrosome com lcd pic interfacing accessed on 8 November 2014 1 51 Appendices Appendix A Project code kp char code1 16 char Default Password 5 2 1 1 1 1 1 int i 0 oldstate int Compare Password char get key char Temp Password DTMF 5 int k 0 keypad module connections char keypadPort at PORTB end keypad module connections module connections sbit LCD RS at RD2 bit sbit LCD EN at RD3 bit sbit LCD D4at RD4 bit sbit LCD D5 at RD5 bit sbit LCD D6 at RD6 bit sbit LCD 07 a
32. on of a differential input amplifier clock oscillator and latched three state bus interface 1 2 3 4 5 6 7 8 9 18 PIN PLASTIC DIP SOIC Figure 2 Pin Connections Pin Description emo 000000 111 Ne Non Inverting Op Amp Input E E Inverting Op Amp Input Gain Select Gives access to output of front end differential amplifier for connection of feedback resistor Reference Voltage Output Nominally Vpp 2 is used to bias inputs at mid rail see Fig 6 and Fig 10 Inhibit Input Logic high inhibits the detection of tones representing characters A B C and D This pin input is internally pulled down Power Down Input Active high Powers down the device and inhibits the oscillator This pin input is internally pulled down 178 TT 0502 Clock Output A 3 579545 MHz crystal connected between pins 0501 and OSC2 completes the internal oscillator circuit 9 10 Ves jGroud pu OVbpia 10 TOE Three State Output Enable Input Logic high enables the outputs Q1 Q4 This pin is pulled up internally 01 04 State Data Output When enabled by TOE provide the code corresponding to the 15 1 14 last valid tone pair received see Table 1 When TOE is logic low the data outputs are high impedance 15 Delayed Steering Output Presents a logic high when a received tone pair has been registered and the output latch updated returns to
33. ppression diodes so no external diodes are required The complete circuit is shown next Figure 3 10 ULN 2803 interface to stepper motor Before programming there is another pattern to notice in the stepping sequence Look at this table which show the four different steps required to make the motor turn 11 Table 3 3 Four different steps of stepper motor Step Coil Coil Coil Coil 1 1 0 1 0 2 1 0 0 1 3 0 1 0 1 4 0 1 1 1 1 0 1 Coil 2 is always the opposite or logical NOT of coil 1 The same applies for coils 3 and 4 It is therefore possible to cut down the number of microcontroller pins required to just two by the use of two additional NOT gates 11 3 8 Keypad Interface with Microcontroller Matrix keypad is widely in our daily life Each switches connecting one row and column So the combinations of rows and columns make up the 16 inputs 12 Initially all the switches are open not connected When button pressed switch is now closed connected Then there is a connection between the row and column 12 Scanning a keypad in PIC16F877A board in case of 4X4 matrix keypad both the ends of switches are connected to the port pin Four rows and four columns all sixteen switches have been interfaced using just eight lines 12 Row lines PORTD 0 PORTD 3 and column lines PORTD 4 to PORTD 7 connected directly by the port pins in PIC16F877A
34. pter One Introduction Background Efficient and reliable security systems are needed for most access point Traditional keys may be forgotten anywhere also remote access control may be needed for those who are far away and while someone should access the point without been informed of the required access password 11 Problem Definition Devices such as motion detectors light detectors among others are susceptible to be triggered by false signals such as noise impulses whenever its sensitivity is increased They are not suitable for most outdoor security protection due to the fact that they don t possess high discriminative capability during operation and they are fairly expensive It is hence imperative to provide a locking device one which is suitable for outdoor security protection also efficient reliable and low cost It includes using correct personal identification numbers to operate the locking device The automatic lock finds application in homes banks in the field of military applications i e ammunition ware house and industries etc 1 2 Objectives To design and build a low cost keyless security system using keypad build in the access point dr mobile phone DTMF if it is required to open the door for kids or relatives when the user or owner is far away from the access point 1 3 Methodology In this project Proteus simulation program will be used to design the electronic circuit with microcontroller as th
35. roduction 2 ae 2 2 Sm Sd ve 23 PIC Microcontroller re lasta utin tri Chapter Three System Design Introduction TS veteri FON eco ed 3 2 Introduction to Proteus 2 2 3 3 MikroC PRO Tor PIG arkene 3 4 System Circuit ERES EE ce tb a tct dale e lu E heter 3 5 PIC K150 roga de de ene 3 6 Dual Tone Multiple Frequency 5 5 6 MODE tuat 3 8 Keypad Interface with 3 9 Interfacing LCD with Microcontroller Chapter Four Result and discussions 4 1 Simulation Results and discussions 4 2 Results of hardware 8 eee Chapter Five Conclusion and Recommendation Se oct Bap eie p ir UE ee ane 2 eneste REN oro tae e Appendices Appendix A Project code Appendix B PIC 16F877A Data Sheet Appendix C ULN2803 Appendix D MT8870 List of Figures Figure Name Page No Figure 3 1 Block diagram the door
36. s data in order to use it for verifying personal identity The combination of biometric data systems and biometrics recognition identification technologies creates the biometric security systems 1 2 1 1 Facial Recognition Detector The human face is one of the characteristic which can be used in biometric security system to identify a user Face recognition technology is very popular and is used more widely because it does not require any kind of physical contact between the users and device Cameras scan the user face and match it to a database for verification Furthermore it is easy to install and does not require any expensive hardware Facial recognition technology is used widely in a variety of security systems such as physical access control or computer user accounts However it is still not as unique as its counterparts such as retinal iris or DNA Therefore it is normally used with other characteristics in the system On the other hand time is the most negative affective factor with face recognition technology because as the user ages will change over time 1 2 1 2 Fingerprint Reader Our fingerprint is made of a number of ridges and valley on the surface of finger that are unique to each human Ridges are the upper skin layer segments of the finger There are several benefits of using fingerprint recognition systems This system is easy to use and install Equipment has low power consumption However there are some dis
37. t RD7 bit sbit LCD RS Direction at TRISD2 bit sbit LCD EN Direction at TRISD3 bit sbit LCD D4 Direction at TRISD4 bit sbit LCD D5 Direction at TRISD5 bit sbit LCD D6 Direction at TRISD6 bit sbit LCD D7 Direction at TRISD7 bit void Open Door Lcd Cmd LCD CLEAR Lcd Out 1 2 lock Open PORTC 0x03 Delay_ms 500 PORTC 0x06 Delay ms 500 PORTC 0x0C Delay ms 500 PORTC 0x09 Delay_ms 500 PORTC 0x03 Delay_ms 500 0 6 Delay ms 500 PORTC 0x0C Delay ms 500 PORTC 0x09 Delay_ms 500 LCD_Cmd _LCD_CLEAR Lcd out 1 2 lock Close PORTC 0x0C Delay ms 500 PORTC 0x06 Delay ms 500 PORTC 0x03 Delay_ms 500 PORTC 0x09 Delay_ms 500 Delay_ms 500 0 6 Delay ms 500 PORTC 0x03 Delay_ms 500 PORTC 0x09 Delay_ms 500 return void code_enter keypad init oldstate 0 kp 0 Reset key code variable wait for key to be pressed and released do kp Keypad Key Press store key code in kp variable kp Keypad Key Click store key code in kp variable while kp prepare value for output transform key to it s ASCII value switch kp case 1 49 break 1 case 2 50 break 2 case 3 kp 51 break 3 case 4 kp 65 break A for 4x4 pad case 5 52 break 4 case 6 kp 53 break 5 case 7 kp 54 break 6 case 8 kp 66 break B for 4x4 pad case 9 kp 55 break
38. t j 0 char Temp_Password1 5 for j 0 j lt 5 j Temp Password1 j code1 j while 1 int f 1 int C int f2 1 int c1 for c 0 c lt 5 c if code1 c Default Password c f 0 for c1 0 c1 lt 5 c1 if Temp Password DTMF c1 Default Password c1 f2 0 1 f2 1 Open Doorf break else Lcd Cmd LCD CLEAR Out 1 4 Sorry Lcd Out 2 1 wrong Password delay ms 2000 Lcd Cmd LCD CLEAR return char get key while 1 if PORTa f4 0 while 1 if PORTa f0 1 amp amp PORTa f1 0 amp amp PORTa f2 0 amp amp PORTa f3 0 if the INPUT 1 return 1 if PORTa f0 0 amp amp PORTa f1 1 amp amp PORTa f2 0 amp amp PORTa f3 0 if the INPUT 2 return 2 if PORTa f0 1 amp amp PORTa f1 1 amp amp PORTa f2 0 amp amp PORTa f3 0 if the INPUT 3 return 3 if PORTa f0 0 amp amp PORTa f1 0 amp amp PORTa f2 1 amp amp PORTa f3 0 if the INPUT 4 return 4 if PORTa f0 1 amp amp PORTa f1 0 amp amp PORTa f2 1 amp amp PORTa f3 0 if the INPUT 5 return 5 if PORTa fO 0 amp amp PORTa f1 1 amp amp PORTa f2 1 amp amp PORTa f3 0 if the INPUT 6 return 6 if PORTa fO 1 amp amp PORTa f1 1 amp amp PORTa f2 1 amp amp PORTa f3 0 if the INPUT 7 return 7
39. the door this message will be display Lock Close on LCD as shown in Figure 4 14 Figure 4 14 Motor is activated in order to lock the door If the user has no access to the premise then he she can contact the residents or someone who has access to the building The idea is 3l that the door could be remotely unlocked by supplying the passwords over the phone using the DTMF functionality This is activated by option 2 then it will display enter password from mobile as shown in Figure 4 15 Figure 4 15 System waiting password from mobile So the owner will call the mobile phone that attached with system he must set the mobile phone in the mode of auto answer when the headset is connect in this mode the phone will auto answer after that the owner will enter the DTMF password remotely The user requesting entrance will then be granted access to the premises The password interring remotely will not be displayed on the LCD for security issue so the message that display on the LCD is Lock open When door is turn to close it will press the reset button so the system will close the lock and LCD will display Door close 32 If the password is wrong when entered from keypad or remotely the LCD will display sorry wrong password as shown in Figure 4 16 Figure 4 17 Overall system and desired outputs 33 Chapter Five Conclusion and Recommendations Chapter Five Conclusions and Recommend
40. ubes 5 i i i MT8870DS 18 Pin SOIC Tubes Internal gain setting amplifier bdo mice e Adjustable guard time MT8870DSR 18 Pin SOIC Tape amp Reel 1 3 MT8870DNR 20 Pin SSOP Tape amp Reel Central office quality MT8870DN1 20 Pin SSOP Tubes MT8870DE1 18 Pin PDIP Tubes Power down mode MT8870DS1 18 Pin SOIC Tubes MT8870DNR1 18 Pin SSOP Tape amp Reel Inhibit mode MT8870DSR1 18 Pin SOIC Tape amp Reel 2 i p Backward compatible with 8870 8870 1 DETT ME S MT8870DSR1 1 18 Pin SOIC Tape amp Reel Pb Free Matte Tin 40 C to 85 C Applications Receiver system for British Telecom BT or CEPT Spec MT8870D 1 Description Paging systems The MT8870D MT8870D 1 is a complete DTMF Repeater systems mobile radio receiver integrating both the bandsplit filter and digital Credit card systems decoder functions The filter section uses switched Remote control capacitor techniques for high and low group filters the decoder uses digital counting techniques to detect Personal computers and decode all 16 DTMF tone pairs into a 4 bit code Telephone answering machine VDD VSS Bias Circuit Chip Chip Power Bias Digital Code Detection Converter Algorithm and Latch D Zero Crossing one Filter Detectors to all Chip St Steering Clocks GT Logic Figure 1 Functional Block Diagram MT8870D MT8870D 1 Data Sheet External component count is minimized by on chip provisi
41. us simulation is shown in Figure 4 1 MINRESTOK MOTOR STEPPER PIC16F877A ULN2803 Figure 4 1 System design in proteus program In the initial state on the LCD display will show only a simple message indicating that it is expecting a password from keypad or mobile phone This is shown in Figure 4 2 Figure 4 2 Initial state of system An authorized user would select option 1 The user is then prompted to enter the password from keypad as shown in Figure 4 3 CRYSTAL DIPSW 5 KEYPAD SMALLCALC LMO18L MINRESTOK MOTOR STEPPER PIC16F877A 142803 OEN NY Y O 8 1 SS Figure 4 3 System waiting password from keypad For security purposes the password is displayed as stars as it is the convention in such systems This is illustrated in Figure 4 4 File View Edit Tools Design Graph Source Debug Library Template System Help 0 5 9 5 4 9 9 6 2 Z BZIB a KIS AW DIPSW 5 KEYPAD SMALLCALC MINRES1OK MOTOR STEPPER PIC16F877A ULN2803 gt m om t gt Ex 2 a e D a Figure 4 4 Entering password to system from keypad If the correct password is entered the motor door lock will be activated in order to unlock the door This is displayed Lock Open on the LCD as shown in Figure 4 5 Fi
42. utput for SPI mode Synchronous serial clock input output for I2C mode Digital I O SPI data in I2C data I O K Digital 1 O SPI data out VO Digital 12 USART asynchronous transmit USART1 synchronous clock 26 29 1 1 ST VO Digital I O USART asynchronous receive USART synchronous data PORTD is a bidirectional I O port or Parallel Slave Port when interfacing to a microprocessor T 19 21 38 38 18 Sig bus Digital I O Parallel Slave Port data 20 22 39 39 VO 9 Digital I O VO Parallel Slave Port data ST T Parallel Slave Port data Digital I O Parallel Slave Port data T Digital I O Parallel Slave Port data Digital I O Parallel Slave Port data Digital I O Parallel Slave Port data 30 33 5 5 SIT vO TL Digital 1 0 VO Parallel Slave Port data REO RD AN5 5 PORTE is a bidirectional I O port Digital 1 O 11 meme Pe mi yf yy ee Du E i Wt iar Paral Stave Port we E pf TT 10 EE ee e 24 B Jeans Sn 1 17 12 13 ER EEG are not internally connected NC 28 40 33 34 These pins should be left unconnected Legend input O output I O input output P power Not used TTL TTL input ST Schmitt Trigger input Note 1 This buffer is a Schmitt Trigger input when configured as the external interrupt 2 This buffer is a Schmitt Trigger input wh
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