單片機(jī)開發(fā)十進(jìn)制和十六進(jìn)制轉(zhuǎn)換

單片機(jī)設(shè)計中經(jīng)常需要用到十進(jìn)制和十六進(jìn)制，他們之間轉(zhuǎn)換如下。

#include <reg51.h>

#include <intrins.h>

#include <stdio.h>

#include <ctype.h>

#define LongToBin(n) \

((n >> 21) & 0x80) | \

((n >> 18) & 0x40) | \

((n >> 15) & 0x20) | \

((n >> 12) & 0x10) | \

((n >> 9) & 0x08) | \

((n >> 6) & 0x04) | \

((n >> 3) & 0x02) | \

((n ) & 0x01) \

)

#define Bin(n) LongToBin(0x##n##l)

// HEX轉(zhuǎn)BCD

//bcd_data(<0x255,>0)

unsigned char BCD2HEX(unsigned int bcd_data)

{

    unsigned char temp;

    temp=((bcd_data>>8)*100)|((bcd_data>>4)*10)|(bcd_data&0x0f);

    return temp;

}

// HEX轉(zhuǎn)BCD

//hex_data(<0xff,>0)

unsigned int HEX2BCD(unsigned char hex_data)

{

    unsigned int bcd_data;

    unsigned char temp;

    temp=hex_data%100;

    bcd_data=((unsigned int)hex_data)/100<<8;

    bcd_data=bcd_data|temp/10<<4;

    bcd_data=bcd_data|temp%10;

    return bcd_data;

}

void main(void)

{

  unsigned int c;

  c= Bin(10101001);                               // c = 0xA9

  c=BCD2HEX(0x255);                            //255 轉(zhuǎn)成HEX為0xff

  c=HEX2BCD(0xff);                            //0xff 轉(zhuǎn)成BCD碼為 255

}