BCＤ码与十进制转换

BCD码转十进制

#include 

/* convert from BCD to dec */
uint8_t dec  = (bcd  >> 4) * 10 + (bcd  & 0x0f);

十进制转BCD码

#include 

/* convert from dec to BCD */
uint8_t bcd = ((dec / 10) << 4 & 0xf0) + ((dec % 10) & 0x0f);