// 4G.cpp: 定義控制臺應用程序的入口點。 //#include "stdafx.h" #include<stdio.h> #include <string.h> typedef unsigned int uint8_t;//USART3_DMA_Send("AT+NMGS=26,98001A010001123456785B4EAC0A080101171211100726C1A2FF\r\n",65); //1531882506----->5B4EAC0A 2018/7/18 10:55:6/*將大寫字母轉換成小寫字母*/ int tolower(int c) {if (c >= 'A' && c <= 'Z'){return c + 'a' - 'A';}else{return c;} }//將十六進制的字符串轉換成整數 int htoi(const char s[]) {int i;int n = 0;if (s[0] == '0' && (s[1] == 'x' || s[1] == 'X')){i = 2;}else{i = 0;}for (; (s[i] >= '0' && s[i] <= '9') || (s[i] >= 'a' && s[i] <= 'z') || (s[i] >= 'A' && s[i] <= 'Z'); ++i){if (tolower(s[i]) > '9'){n = 16 * n + (10 + tolower(s[i]) - 'a');}else{n = 16 * n + (tolower(s[i]) - '0');}}return n; } //得到4位校驗碼 unsigned short CRC16_XMODEM( char *puchMsg, unsigned int usDataLen) {unsigned short wCRCin = 0x0000;unsigned short wCPoly = 0x1021;unsigned char wChar = 0;while (usDataLen--){wChar = *(puchMsg++);wCRCin ^= (wChar << 8);for (int i = 0; i < 8; i++){if (wCRCin & 0x8000)wCRCin = (wCRCin << 1) ^ wCPoly;elsewCRCin = wCRCin << 1;}}return (wCRCin); }void InvertUint8(unsigned char *dBuf, unsigned char *srcBuf) {int i;unsigned char tmp[4];tmp[0] = 0;for (i = 0; i< 8; i++){if (srcBuf[0] & (1 << i))tmp[0] |= 1 << (7 - i);}dBuf[0] = tmp[0];}void InvertUint16(unsigned short *dBuf, unsigned short *srcBuf) {int i;unsigned short tmp[4];tmp[0] = 0;for (i = 0; i < 16; i++){if (srcBuf[0] & (1 << i))tmp[0] |= 1 << (15 - i);}dBuf[0] = tmp[0]; }unsigned short CRC16_CCITT(char *puchMsg, unsigned int usDataLen) {unsigned short wCRCin = 0x0000;unsigned short wCPoly = 0x1021;unsigned char wChar = 0;while (usDataLen--){wChar = *(puchMsg++);InvertUint8(&wChar, &wChar);wCRCin ^= (wChar << 8);for (int i = 0; i < 8; i++){if (wCRCin & 0x8000)wCRCin = (wCRCin << 1) ^ wCPoly;elsewCRCin = wCRCin << 1;}}InvertUint16(&wCRCin, &wCRCin);return (wCRCin); }int main() {const char *S = "5B4EAC0A";long Time = htoi(S);printf("Time = %ld\n", Time);//98001A010001123456785B4EAC0A080101171211100726char SS[] = "98001A010001123456785B4EAC0A080101171211100726";//C1A2unsigned int lentgh = strlen(SS);printf("lentgh = %d\n", lentgh);unsigned short Check_code = CRC16_XMODEM(SS,46);printf("Check_code = %0X\n", Check_code);unsigned short Check_code2 = CRC16_CCITT(SS, 46);printf("Check_code = %0X\n", Check_code2);getchar();return 0; }

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