bytes.c

keil C51 Byte事例

#include <Reg52.H>  

/* ............................................................... */

void main (void)
   {
   unsigned char Port1_value;

   // Must set up P1 for reading
   P1 = 0xFF;

   while(1) 
     { 
     // Read the value of P1
     Port1_value = P1;

     // Copy the value to P2
     P2 = Port1_value;
     }
   }

/*------------------------------------------------------------------*-
  ---- END OF FILE -------------------------------------------------
-*------------------------------------------------------------------*/