[lion]

đây là 1 đoạn code viết cho 74hc595 :

//--------------------------------------------------------------
#define  DATA      RB7 
#define  CLK        RB6 
#define  STR        RB5 

void display_used_74hc595(unsigned char x)
{
   unsigned char i ;
      
   for(i=0;i<8;i++)
     {
        if( bit_test(x,0) == 1 ) 
           {
              DATA=1 ;  
           }
        else
           {
              DATA=0 ;          
           };
        CLK=0;
        CLK=1;
        
        x = x>>1 ;     
     };
}
//--------------------------------------------------
void main(void)
{
  

   TRISA=0xff;
   TRISB=0x00;
   TRISC=0xff; 
   TRISD=0xff;
   
    while(true)
       {
            
                            
              
              display_used_74hc595( 1 ) ;
              
              STR=1;
              STR=0;
          
        };
}