#include<stdio.h>#define dataStart 6unsigned int CRC;char inputStr[100];//字符转为16进制整数unsigned int ChangeTo16(char ch){ if(ch-'9'<=0) return ch-'0'; else return ch-'A'+10;}//一轮CRC转化void CRC_Change(unsigned int data){ int i; CRC^=data; for(i=0;i<8;i++) { if(CRC&0x0001) { CRC>>=1; CRC^=0xA001; } else CRC>>=1; }}int main(){ unsigned int slaAddr,func,staAddr,numOfbyte; unsigned int temp,tempCRC; unsigned int i,len; unsigned long floatData; unsigned long *longAddr; float *floatAddr; while(scanf("%u,%u,%u,%u",&slaAddr,&func,&staAddr,&numOfbyte)!=EOF) { CRC=0xFFFF; CRC_Change(slaAddr); CRC_Change(func); CRC_Change(staAddr>>8); CRC_Change(staAddr&0x00ff); CRC_Change(numOfbyte>>8); CRC_Change(numOfbyte&0x00ff); temp=CRC&0x00ff; temp<<=8; CRC=(CRC>>8)|temp; printf("%02X%02X%04X%04X%Xn",slaAddr,func,staAddr,numOfbyte,CRC); scanf("%s",&inputStr); CRC=0xFFFF; CRC_Change(ChangeTo16(inputStr[0])*16+ChangeTo16(inputStr[1])); CRC_Change(ChangeTo16(inputStr[2])*16+ChangeTo16(inputStr[3])); len=ChangeTo16(inputStr[4])*16+ChangeTo16(inputStr[5]); CRC_Change(len); for(i=0;i<len*2;i+=2) CRC_Change(ChangeTo16(inputStr[i+dataStart])*16+ChangeTo16(inputStr[i+1+dataStart])); temp=CRC&0x00ff; temp<<=8; CRC=(CRC>>8)|temp; tempCRC=ChangeTo16(inputStr[i+dataStart])*0x1000 +ChangeTo16(inputStr[i+1+dataStart])*0x0100 +ChangeTo16(inputStr[i+2+dataStart])*0x0010 +ChangeTo16(inputStr[i+3+dataStart]); if(CRC!=tempCRC) { printf("CRC_ERRORn"); continue; } for(i=0;i<len*2;i+=8) { floatData=ChangeTo16(inputStr[i+dataStart])*0x10000000 +ChangeTo16(inputStr[i+1+dataStart])*0x01000000 +ChangeTo16(inputStr[i+2+dataStart])*0x00100000 +ChangeTo16(inputStr[i+3+dataStart])*0x00010000 +ChangeTo16(inputStr[i+4+dataStart])*0x00001000 +ChangeTo16(inputStr[i+5+dataStart])*0x00000100 +ChangeTo16(inputStr[i+6+dataStart])*0x00000010 +ChangeTo16(inputStr[i+7+dataStart]); longAddr=&floatData floatAddr=(float*)longAddr; if(i>0) printf(","); printf("%.1f",*floatAddr); } printf("n"); } return 0;}
