led.c

陵阳61单片机的计数测速程序

/*--------------------------------------------------------------------------
LED.C

LED access macros and functions for the DE51-S by Windsun
--------------------------------------------------------------------------*/
#include <LED.h>
#define P_IOA_Data			(volatile unsigned int *)0x7000
#define P_IOA_Buffer		(volatile unsigned int *)0x7001
#define P_IOA_Dir			(volatile unsigned int *)0x7002
#define P_IOA_Attrib		(volatile unsigned int *)0x7003
#define P_IOB_Data			(volatile unsigned int *)0x7005
#define P_IOB_Buffer		(volatile unsigned int *)0x7006
#define P_IOB_Dir			(volatile unsigned int *)0x7007
#define P_IOB_Attrib		(volatile unsigned int *)0x7008
#define P_Watchdog_Clear 	(volatile unsigned int *)0x7012

 #ifdef INTOUT
 #define DELAY 300
 unsigned char dig[4];
 void delayfordig()
 {unsigned int i;
 for(i=0;i<=DELAY;i++);
 }
 
 void setdig_dec(unsigned int *toshow)
 {
 dig[0]=*toshow%10;
 dig[1]=(*toshow/10)%10;
 dig[2]=(*toshow/100)%10;
 dig[3]=(*toshow/1000)%10;
 };
 void setdig_hex(unsigned int *toshow)
 {dig[0]=*toshow&0x000f;
dig[1]=(*toshow>>4) &0x000f;
dig[2]=(*toshow>>8)&0x000f;
dig[3]=(*toshow>>12)&0x000f;
 }
 void  showdig()
 {
 static unsigned int num;
for(num=0;num<4;num++)
{

*P_IOA_Data=NUMTOSEG7(dig[num],0);
*P_IOB_Data=(*P_IOB_Data&0xffc7)|(0x20>>num)|0x0004;
delayfordig();
}
}
 
 
 
 
 
 
 
 
 
 #endif

unsigned char NUMTOSEG7(unsigned char DATA,unsigned char point)
{ unsigned char AA;
  switch (DATA)
  { case 0: AA=0x3f;break; /* ‘0’*/
    case 1: AA=0x06;break; /* ‘1’*/
    case 2: AA=0x5b;break; /* ‘2’*/
    case 3: AA=0x4f;break; /* ‘3’*/
    case 4: AA=0x66;break; /* ‘4’*/
    case 5: AA=0x6d;break; /* ‘5’*/
    case 6: AA=0x7d;break; /* ‘6’*/
    case 7: AA=0x07;break; /* ‘7’*/
    case 8: AA=0x7f;break; /* ‘8’*/
    case 9: AA=0x6f;break; /*9*/ 
    case 10:AA=0x77;break; /*A*/
    case 11:AA=0x7c;break; /*b*/
    case 12:AA=0x39;break;/*c*/
    case 13:AA=0x5e;break;/*d*/
    case 14:AA=0x79;break;/*E*/
    case 15:AA=0x71;break;/*F*/
    default: AA=0x00;
  }
  if(point)AA|=0x80;
  return(AA);
}