12键盘密码锁设计报告.txt

这是个嵌入式开发的小程序

#include <msp430x44x.h>
#define KEY_BOARD 1

unsigned char key_Pressed,      
              key_val,          
              key_Flag;         
unsigned char key_Map[12] ={    
                           1,2,3,10,4,5,
                           6,0,7,8,9,11
                           };

void init_Keyboard(void){
     
      P1DIR &= 0x01; 
      P1DIR |= 0x0E;  
      P1OUT |= 0x0E; 
      key_Flag    = 0;
      key_Pressed = 0;
      
}

void check_Key(void){
    
    unsigned char row ,col,tmp1,tmp2;

    tmp1 = 0x08;
    for(row=0;row<3;row++){
        P1OUT |= 0x0E;                         
        P1OUT -= tmp1;                       
        tmp1 = tmp1/2;                               
        if ((P1IN & 0xf0) < 0xf0){                    
           tmp2 = 0x80;                        
           for(col =0;col<0x04;col++){          
              if((P1IN & tmp2)==0x00){          
                key_val =key_Map[ row*4 +col] ; 
                return;                         
              }
              tmp2 /= 2;                         
           }
        }
    }
         
}

void delay(unsigned char i)
{
  while(i!=0)i--;
 }

void key_Event(void){
     
     unsigned char tmp;
     P1OUT &= 0x01;         
     tmp = P1IN;            
     if ((key_Pressed ==0x00)&&((tmp & 0xf0) < 0xf0)) 
     {                      
         key_Pressed = 1;  
         delay(500);          
         check_Key();    
     }else if ((key_Pressed ==1)&&((tmp & 0xf0) == 0xf0))
     {                     
         key_Pressed = 0;   
         key_Flag    = 1;   
     }
     
}

#define LED_IN_USE 6

const unsigned char NUM_LED[17]=
                       {0xd7,0x14,0xcd,0x5d,0x1E,  
                       0x5b,0xdb,0x15,0xdf,0x5f,   
                       0x9f,0xda,0xc3,0xcc,0xcf,  
                       0x8b,0x00};                

                       
unsigned char led_Buf[LED_IN_USE];  
                                                            
unsigned char led_Ctrl;

void init_LED(void){
    char tmpv;
    P3DIR  = 0xff;   
    P3OUT  = 0x00;    
    P4DIR |= 0x03;     
    P4OUT &= 0xfc;  
    led_Ctrl = 0;    
    for(tmpv=0;tmpv<LED_IN_USE;tmpv++)
    {                
      led_Buf[tmpv] = 0;
    }
    
}

void led_Display(){                   
    unsigned tmp ;
      
      tmp    = 0x01;
      P3OUT  = NUM_LED[led_Buf[led_Ctrl]]; 
      P4OUT |= 0x02;                      
      P4OUT &= 0XFD;                      
      P3OUT  = ~(tmp<<led_Ctrl);           
      P4OUT  |= 0x01;                       
      P4OUT  &= 0XFE;                       
      led_Ctrl= (led_Ctrl +1) % LED_IN_USE; 
      
}



void main(void)
{   
     unsigned char keyin[]={1,2,3,4,5,6};
     WDTCTL = WDTHOLD + WDTPW ;          
 kkk:P5DIR |= 0x02;
     P5OUT &=0X00;
     
     char k[6]={0};
     
               
     init_Keyboard();                                   
     while(1)
     {
           for(int i=0;i<6;)
           {
            key_Event();                 
            if (key_Flag == 1)      
              {
                k[i]=key_val;
                i++;
                key_Flag= 0;
              }
            
           }
    if( k[0] == keyin[0])
        if( k[1] == keyin[1])
          if( k[2] == keyin[2])
            if( k[3] == keyin[3])
              if( k[4] == keyin[4])
                if(k[5] == keyin[5])
                 {
                  P5OUT |=0X02;
                  while(1)
                  {
                    key_Event();  
                    if (key_Flag == 1) goto kkk;
                  }
                 }
         else
           P5OUT &=~0X02;
       else
         P5OUT &=~0X02;
     else
        P5OUT &=~0X02;
    else
       P5OUT &=~0X02;
   else
      P5OUT &=~0X02;
     }
}