BCD ASCII 相互转换

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头文件

#include <ctype.h>     // for toupper

BCD 转 ASCII

void WhAsciiToBcd(unsigned char *psDataIn, size_t uiDataInLen, unsigned char *psDataOut){    unsigned char ucTemp = 0;    for (size_t i = 0; i < uiDataInLen; i += 2) {        ucTemp = psDataIn[i];        if (ucTemp > '9') {            ucTemp = (unsigned char)toupper((unsigned char)ucTemp) - 'A' + 0x0A;        } else {            ucTemp &= 0x0F;        }        psDataOut[i / 2] = ucTemp << 4;        ucTemp = psDataIn[i+1];        if (ucTemp > '9') {            ucTemp = (unsigned char)toupper((unsigned char)ucTemp) - 'A' + 0x0A;        } else {            ucTemp &= 0x0F;        }        psDataOut[i/2] |= ucTemp;    }}

ASCII 转 BCD

void WhBcdToAscii(unsigned char *psDataIn, size_t uiDataInLen, unsigned char *psDataOut){    unsigned char sAscii[] = "0123456789ABCDEF";    for (size_t i = 0; i < uiDataInLen; i++) {        psDataOut[2 * i]   = sAscii[(psDataIn[i] >> 4)];        psDataOut[2 * i + 1] = sAscii[(psDataIn[i] & 0x0F)];    }}

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