Initial password: 12345678
This program is implemented by using 51 single chip microcomputer to control 74LS164 latch
The MCU and the memory use IIC communication to establish the cryptographic system communication.
Simulation starts and password is set
Universal password lock reference program source code:
#include #include "intrins.h" #include "key.h" #include "xsh.h" #include "24c02.h" #define ulong unsigned long bit BJCB=0; //Alarm flag XG=0, //Change password flag BJ=0, //Alarm flag SJ=0; //Keyboard lock flag // xg=0; //Change password flag uchar PSWD0_0[16]={0}; //password input cache storage unit //uchar code PSWD0_1[16]={1,2,3,4,5,6,7,8,1,2,3,4,5,6,7,8}; //User initial password storage unit //uchar PSWD1_0[16]={0}; //Read the password cache storage unit uchar PSWD1_1[16]={1,2,3,4,5,6,7,8,1,2,3,4,5,6,7,8}; Administrator initial password storage unit sbit OUT=P3^5; //output port sbit L1=P0^2; //Power-on indication sbit L2=P0^1; //Unlock indication sbit L3=P0^0; //Alarm indication uint mg=0, //Number of passwords KSC=0, //Number of unlocking times BJC=0, //Number of alarms TCNTY=0, //User key timing count accumulation TCNTG=0, //Timed number of times the administrator enters the password yhsh, //User input flag glsh, //Administrator input flag shw; // Password input completed flag void yhmimaxig(); //password modification procedure void glmimaxig(); //Administrator modifies the program void bjyin(ulong t) { ulong c; uint n; for(c=0;c for(n=0;n<50;n++); //delay BEEP=~BEEP; //Invert the signal output to the speaker } } void delay_10ms(void) { uint i = 1000; while(i–); } //Timer interrupt service function// void timer0() interrupt 1 { uint i; TH0=(65536-50000)/256; //Assign 50MS timing to TH0 TL0 TL0=(65536-50000)%256; //Reload count initial value if(yhsh1) { TCNTY++; //User timing count if(shw1) { TR0=0; TCNTY=0; } if(TCNTY400) { TR0=0; //turn off T0 timer TCNTY=0; mg=0; //Password number cleared L1=1; for(i=0;i<2;i++)//sound and light alarm circuit { L3=0; bjyin(1000); L3=1; delay(1000); } L1=0; } } else if(glsh1) { TCNTG++; //Administrator timing count if(shw1) { TR0=0; TCNTG=0; } if(TCNTG400) { TR0=0; //turn off T0 timer TCNTG=0; mg=0; //Password number cleared L1=1; for(i=0;i<2;i++)//sound and light alarm circuit { L3=0; bjyin(1000); L3=1; delay(1000); } L1=0; } } } void main() { uint i; TMOD=0x01; //Timer works in mode 1 ET0=1; EA=1; TH0=(65536-50000)/256; //Assign value to TH0 TL0 TL0=(65536-50000)%256; // Make the timer interrupt once every 0.05 seconds //Read_page24c02(0x00,PSWD1_1,16); //Read the user's initial password from 24c02 //i2cWrite24LC16B(0,0X20); /Write the initial administrator password, user password, and unlock times into 24c02 for the first time/ for(i=0;i<16;i++) //Write one at a time to 24c02 { i2cWrite24LC16B(PSWD1_1[i],i); delay_10ms; } for(i=0;i<16;i++) //Write one at a time to 24c02 { i2cWrite24LC16B(PSWD1_1[i],0x10+i); delay_10ms; } //Used during proteus simulation, when burning the program, use it for the first time and not for the second time. KSC=i2cRead24LC16B(0X20); loop: L1=0; //The red light turns on when powered on L2=1; //The green light turns on after unlocking successfully L3=1; // Yellow light turns on to alarm when input is wrong OUT=0; //Open signal close display_0(KSC); //Display before unlocking ///Password input/ if(SJ0) //keyboard lock flag is 0 { do { flag=0; //Keyboard flag key(); if(flag1&&num12) //Judge whether the administrator function key is pressed { goto gl; } if(flag1&&num<=9) { PSWD0_0[mg]=num; mg++; //Number of passwords } if(flag1&&num14&&mg>=1)//delete input error { mg=mg-1; } if(mg1) //A password key is pressed to start the timer { TR0=1; yhsh=1; } } while(num!=15); if(mg!=16) { for(i=mg;i<16;i++) { PSWD0_0[i]=0; } } /Password comparison circuit if(flag1&&num==15) { flag=0; yhsh=0; shw=1; num=0; for(i=0;i<16;i++) //Read 16 passwords from 24c02 { PSWD1_1[i]=i2cRead24LC16B(i); delay_10ms; } for(i=0;i<16;i++) { if(PSWD1_1[i]!=PSWD0_0[i]) { BJCB=1; break; } else BJCB=0; } } if(BJCB!=0) { BJC++; if(BJC!=3) { BJCB=0; //First and second alarms delay(500); mg=0; //Password number cleared L1=1; for(i=0;i<3;i++)//sound and light alarm circuit { L3=0; display_3(); bjyin(1000); L3=1; delay(1000); } goto loop; } else if(BJC3) { BJC=0; BJCB=0; display_5(); //Failed to enter the password three times, self-lock SJ=1; //Keyboard lock flag mg=0; //Password number cleared L1=1; for(i=0;i<2;i++)//sound and light alarm circuit { L3=0; bjyin(1000); L3=1; delay(1000); } goto loop; } } else if(BJCB0) { KSC++; display_1(KSC); i2cWrite24LC16B(KSC,0X20); if(KSC100) { SJ=1; } L2=0; L1=1; OUT=1; mg=0; //Password number cleared loop1:do //keyboard scan and wait for function key to be pressed { flag=0; key(); if(flag) { flag=0; switch(num) { case 13: { display_2(); do { flag=0; //Keyboard flag key(); if(flag1&&num<=9) { PSWD0_0[mg]=num; mg++; //Number of passwords } if(flag1&&num14&&mg>=1)//delete input error { mg=mg-1; } if(mg16) { do //Keyboard scan waiting for function key to be pressed { flag=0; key(); } while(num!=15); } } while(num!=15); if(mg!=16&&num15) { for(i=mg;i<16;i++) { PSWD0_0[i]=0; } } if(flag1&&num15) { flag=0; mg=0; for(i=0;i<16;i++) //Write one at a time to 24c02 { i2cWrite24LC16B(PSWD0_0[i],i); delay_10ms; } display_1(KSC); do //Keyboard scan waiting for function key to be pressed { flag=0; key(); } while(num!=11); //Press the return key and the lock will return { goto loop; } } };break; case 11: { goto loop; //break; } } } } while(flag!=0); //If the password key is pressed goto loop1; // i2cWrite24c02_page(0x00,PSWD1_1,mg); } } else { do { flag=0; key(); } while(num!=12);//Judge whether the administrator function key is pressed gl:do//Administrator enters password { flag=0; key(); if(flag1&&num<=9) { PSWD0_0[mg]=num; mg++; //Number of passwords } if(flag1&&num14&&mg>=1)//Delete key is pressed { mg=mg-1; } if(mg1) { TR0=1; }//Open the timer to unlock in 5 seconds } while(num!=15); if(mg!=16&&num15) { for(i=mg;i<16;i++) { PSWD0_0[i]=0; } } //Compare the administrator password/// //Read_page24c02(0x10,PSWD0_1,16) for(i=0;i<16;i++) //Read 16 passwords from 24c02 { PSWD1_1[i]=i2cRead24LC16B((0x10+i)); delay_10ms; } if(flag1&&num==15) { flag=0; shw=1; num=0; for(i=0;i if(PSWD1_1[i]!=PSWD0_0[i]) { BJCB=1; break; } else BJCB=0; } } if(BJCB!=0) { BJC++; if(BJC!=3) { BJCB=0; //First and second alarms mg=0; //Password number cleared L1=1; for(i=0;i<2;i++)//sound and light alarm circuit { L3=0; display_3(); bjyin(1000); L3=1; delay(1000); } display_1(KSC); goto loop; } else { BJCB=0; display_5(); //Failed to enter the password three times, self-lock mg=0; //Password number cleared delay(10000); display_1(KSC); goto loop; } } else { SJ=0; display_4(); //Administrator unlock display mg=0; L2=0; L1=1; L3=0; //Password number cleared do //Keyboard scan waiting for function key to be pressed { flag=0; key(); } while(flag0); //If the password key is pressed if(flag1&&num13) { flag=0; display_2(); do { flag=0; //Keyboard flag key(); if(flag1&&num<=9) { PSWD0_0[mg]=num; mg++; //Number of passwords } if(flag1&&num14&&mg>=1)//delete input error { mg=mg-1; } if(mg16) { do //Keyboard scan waiting for function key to be pressed { flag=0; key(); } while(num!=15); } } while(num!=15); if(mg!=16&&num15) { for(i=mg;i<16;i++) { PSWD0_0[i]=0; } } if(flag1&&num15) { flag=0; mg=0; for(i=0;i<16;i++) //Write one at a time to 24c02 { i2cWrite24LC16B(PSWD0_0[i],(0x10+i)); delay_10ms; } display_4(); do //Keyboard scan waiting for function key to be pressed { flag=0; key(); } while(num!=11); //Press the return key and the lock will return { goto loop; } } } if(flag1&&num10) { KSC=0; i2cWrite24LC16B(KSC,0X20); display_1(KSC); do //Keyboard scan waiting for function key to be pressed { flag=0; key(); } while(num!=11);//Press the return key to return goto loop; } if(flag1&&num11)//Press the return key and the lock will return { goto loop; } } } }
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