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#include<reg51.h> #include<intrins.h> sbit RS=P3^1; sbit RW=P3^2; sbit E=P3^3; void lcd_w_cmd(unsigned char com); void lcd_w_dat(unsigned char dat); unsigned char lcd_r_start(); void lcd_int(); void delay(unsigned int i); void delay1(); char keyscan(); void puts(unsigned char ch[]); void set_pw(); unsigned char codekey_code[]={0xee,0xde,0xbe,0x7e,0xed,0xdd,0xbd,0x7d,0xeb,0xdb,0xbb,0x7b,0xe7,0xd7,0xb7,0x77}; unsigned char pw[6]={0,0,0,0,0,0,}; unsigned char pwnew[10]={0,0,0,0,0,0,0,0,0,0}; sbit P30=P3^0; void puts(unsigned char ch[]) { unsigned char i; i=0; while(ch[i]!='\0') { lcd_w_dat(ch[i]); i++; } } void set_pw() { unsigned char key,count; lcd_w_cmd(0x01); puts("password setup:"); lcd_w_cmd(0xc0); while(1) { key=keyscan(); if(key>=0&&key<=9) { lcd_w_dat(key+0x30); pw[count]=key; count++; if(count==6)break; P2=0xf0; while(P2!=0xf0);} } } void main() { unsigned char i,count; bit pw_flag; P1=0xff; lcd_int(); delay(255); lcd_w_cmd(0x80); puts("password:"); count=0; while(1) { i=keyscan(); if(i!=-1) { if(i>=0&&i<=9) { pwnew[count]=i; lcd_w_dat(i+0x30); count++; P2=0xf0; while(P2!=0xf0);} else if(i==10) { pw_flag=1; if(count!=6) pw_flag=0; else { for(i=0;i<6;i++) { if(pw[i]!=pwnew[i]) { pw_flag=0;break;} } } if(pw_flag==1) { lcd_w_cmd(0xc0); puts("pass"); P30=0; P2=0xf0; while(P2!=0xf0); while(1) { i=keyscan(); if(i!=-1) break; } P2=0xf0; while(P2!=0xf0); if(i==11)set_pw(); } else { lcd_w_cmd(0xc0); P30=1; puts("error");} count=0; delay(50000); lcd_w_cmd(0x01); puts("password:"); }}}} char keyscan() { char scan1,scan2,keycode,j,key; key=-1; P2=0xf0; scan1=P2; if(scan1!=0xf0) { delay(1200); scan1=P2; if(scan1!=0xf0) { P2=0x0f; scan2=P2; keycode=scan1|scan2; for(j=0;j<16;j++) { if(keycode==codekey_code[j]) { key=j;break;} }}} return(key); } void delay1() { _nop_(); _nop_(); _nop_(); } void lcd_int() { lcd_w_cmd(0x3c); lcd_w_cmd(0x0e); lcd_w_cmd(0x01); lcd_w_cmd(0x06); lcd_w_cmd(0x80); } unsigned char lcd_r_start() { unsigned char s; RW=1; delay1(); RS=0; delay1(); E=1; delay1(); s=P1; delay1(); E=0; delay1(); RW=0; delay1(); return(s); } void lcd_w_cmd(unsigned char com) { unsigned char i; do{ i=lcd_r_start(); i&=0x80; delay(2); } while(i!=0); RW=0; delay1(); RS=0; delay1(); E=1; delay1(); P1=com; delay1(); E=0; delay1(); RW=1; delay(255); } void lcd_w_dat(unsigned char dat) { unsigned char i; do{ i=lcd_r_start(); i&=0x80; delay(2); } while(i!=0); RW=0; delay1(); RS=1; delay1(); E=1; delay1(); P1=dat; delay1(); E=0; delay1(); RW=1; delay(255); } void delay(unsigned int i) {unsigned int k; for(k=0;k<i;k++); } |
