delay.c

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// DELAY
   
#include"reg52.h"
extern bit P0_flag;
extern unsigned char data wdt_count;
extern void delay1ms(unsigned char count)
 {     
  unsigned  int i;
  unsigned  int j; 
  unsigned  int k;  
    
   for(i=0;i<count;i++)
    {
    for(j=0;j<40;j++)
     {
	 for(k=0;k<120;k++)
      {
      if(wdt_count<15)
      {
      WDTRST=0x1E;                               
      WDTRST=0xE1;
      }
	  }
     }
    }
 }

extern void delay50us(unsigned char count)
 {
  unsigned int i;
  unsigned int j;

  for(j=0;j<count;j++)
  {
   for(i=0;i<6;i++)
   {
    if(wdt_count<15)
    {
    WDTRST=0x1E;                              
    WDTRST=0xE1;
    }
   }
  }
 }