毕业设计密码锁电路程序

1、密码锁本设计以STC89C52RC单片机为核心，利用AT24C02存储密码，做到掉电存储密码的电子密码锁。电路：程序：#include#include#define uint unsigned int#define uchar unsigned char#defineN 7#defineOP_READ 0xa1/ 器件地址以及读取操作#defineOP_WRITE 0xa0/ 器件地址以及写入操作#defineMAX_ADDR 0x7f/ AT24C02最大地址sbit SCL=P20; sbit SDA=P21;sbit CSH=P30;sbit e=P34;sbit rs=P35;sbit

2、 sp=P36;sbit lock=P31;sfr duan=0x80;sfr key=0x90;uint ci;uchar kc,sc,sc2;int shu1,shu2,jh,jg;uchar code table = LOCK ;uchar code table2=WELLCOME TO USE!;uchar code table3=PASS WORD:;uchar code table4=ERRO!;uchar code table5=OPEN!;uchar code table6=NEW PASS WORD;uchar code table7=SUCCESSFUL!;uchar co

3、de table8=FAIL!;uchar code cmm6=1,2,3,3,2,1;uchar mm6;uchar tablesuanN;void init();void writec(uint com);void writed(uint dat);void delay(uint shu);uchar keyscan();void xieshuzu(uchar a,uchar add);void shuru();void kaiji();void bijiao();void xies(uchar a,uchar add);void delayms(unsigned char ms);voi

4、d gmm();/*/ /*/ /*/ void start()/ 开始位SDA = 1;SCL = 1;_nop_();_nop_();SDA = 0;_nop_();_nop_();_nop_();_nop_();SCL = 0;void stop()/ 停止位SDA = 0;_nop_();_nop_();SCL = 1;_nop_();_nop_();_nop_();_nop_();SDA = 1;unsigned char shin()/ 从AT24Cxx移入数据到MCUunsigned char i,read_data;for(i = 0; i 8; i+)SCL = 1;read

5、_data = 1;read_data |= (unsigned char)SDA;SCL = 0;return(read_data);bit shout(unsigned char write_data)/ 从MCU移出数据到AT24Cxxunsigned char i;bit ack_bit;for(i = 0; i 8; i+)/ 循环移入8个位SDA = (bit)(write_data & 0x80);_nop_();SCL = 1;_nop_();_nop_();SCL = 0;write_data = 1;SDA = 1;/ 读取应答_nop_();_nop_();SCL = 1

6、;_nop_();_nop_();_nop_();_nop_();ack_bit = SDA;SCL = 0;return ack_bit;/ 返回AT24Cxx应答位void write_byte(unsigned char addr, unsigned char write_data)/ 在指定地址addr处写入数据write_datastart();shout(OP_WRITE);shout(addr);shout(write_data);stop();delayms(10);/ 写入周期unsigned char read_current()/ 在当前地址读取unsigned char

7、 read_data;start();shout(OP_READ);read_data = shin();stop();return read_data;unsigned char read_random(unsigned char random_addr)/ 在指定地址读取start();shout(OP_WRITE);shout(random_addr);return(read_current();void delayms(unsigned char ms)/ 延时子程序unsigned char i;while(ms-)for(i = 0; i 0;i-) for(j=110;j0;j-

8、);/*/ /现盘扫描/uchar keyscan() uchar k,skey; key=0xfe; skey=key; sp=1; if(skey!=0xfe) delay(10); skey=key; if(skey!=0xfe) switch(skey) case(0xee):k=7;kc+;break; case(0xde):k=8;kc+;break; case(0xbe):k=9;kc+;break; case(0x7e):k=0x0a;kc+;break; default:break; while(skey!=0xfe) skey=key; sp=0; return k; ke

9、y=0xfd; skey=key; if(skey!=0xfd) delay(10); skey=key; if(skey!=0xfd) switch(skey) case(0xed):k=4;kc+;break; case(0xdd):k=5;kc+;break; case(0xbd):k=6;kc+;break; case(0x7d):k=0x0b;kc+;break; default:break; while(skey!=0xfd) skey=key; sp=0; return k; key=0xfb; skey=key; if(skey!=0xfb) delay(10); skey=k

10、ey; if(skey!=0xfb) switch(skey) case(0xeb):k=1;kc+;break;case(0xdb):k=2;kc+;break; case(0xbb):k=3;kc+;break;case(0x7b):k=0x0c;kc+;break;default:break;while(skey!=0xfb)skey=key; sp=0;return k; key=0xf7; skey=key; if(skey!=0xf7) delay(10); skey=key; if(skey!=0xf7) switch(skey) case(0xe7):k=0x0d;kc+;br

11、eak; case(0xd7):k=0; kc+;break; case(0xb7):k=0x0e;kc+;break; case(0x77):k=0x0f;kc+;break; default:break; while(skey!=0xf7) skey=key; sp=0; return k; /*/ /输入数据处理/void shuru()uchar k=0,xw=0x80;sc=0;kc=0;xieshuzu(table3,0x80);do while(kc=sc) k=keyscan(); if(kc=1) writec(0x01); tablesuansc=k; /xies(tabl

12、esuansc,xw); xies(tablesuansc,0xc0); writec(xw); writed(0x2A); xw+; if(sc=5) goto out; while(tablesuansc+=9)&(scN) writec(0x01); xieshuzu(table4,0x80); void bijiao()if(tablesuan0=mm0)&(tablesuan1=mm1)&(tablesuan2=mm2)&(tablesuan3=mm3)&(tablesuan4=mm4)&(tablesuan5=mm5) EA=1; lock=1; writec(0x01); xie

13、shuzu(table5,0x80); delay(6500); EA=0; else writec(0x01); xieshuzu(table3,0x80); void gmm() uchar k=0,xw=0x80;sc2=0;kc=0;xieshuzu(table6,0x80);do while(kc=sc2) k=keyscan(); if(kc=1) writec(0x01); mmsc2=k; xies(mmsc2,0xc0); writec(xw); writed(0x2A); xw+; if(sc2=5) goto out2; while(mmsc2+=9)&(sc2N) / writec(0x01); xieshuzu(table8,0x80); goto out3; / out2:; writec(0x01); xieshuzu(table7,0x80);write_byte(2,mm0); /在24c02的地址2中写入数据secdelayms(2);write_byte(3,mm1); /在24c02的地址2中写入数据secdelayms(2);write_byte(4,mm2); /在24c02的地址2