串口发送的数据的格式 有格式的 长度(2)+数据+0x03+lrc#include <windows.h>#include <stdlib.h>#include <stdio.h>HANDLE gComHandle;#define SI 0xf#define SO 0xe#define STX 0x02#define ETX 0x03void LogToFile(char *fmt,...){va_list pvar; char buffer[2048]; char log[2048];//char filename[40]; // FILE *fp;//memset(filename,0,sizeof(filename));//sprintf(filename,"%08d.txt",GetDate());//fp=fopen(filename,"a"); memset(buffer,0,sizeof(buffer)); memset(log,0,sizeof(log)); va_start(pvar,fmt); vsprintf(buffer,fmt,pvar); va_end(pvar); sprintf(log,"%s",buffer);printf("%s\n",log);//fprintf(fp,"%s\n",log);fflush(stdout);//fflush(fp);//fclose(fp);}unsigned char GenLrc(unsigned char *Data,size_t DataLen){unsigned int i;unsigned char lrc = 0;for (i = 0; i < DataLen; i++){lrc ^= Data[i];}return lrc;}int InitCom(void){COMMTIMEOUTS TimeOuts;DCB dcb;gComHandle=CreateFile("COM2",GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);if(gComHandle==(HANDLE)-1){LogToFile("打开COM失败!");return -1;}SetupComm(gComHandle,1024,1024); //输入缓冲区和输出缓冲区的大小都是1024//设定读超时TimeOuts.ReadIntervalTimeout=MAXDWORD;TimeOuts.ReadTotalTimeoutMultiplier=MAXDWORD;TimeOuts.ReadTotalTimeoutConstant=10000;TimeOuts.WriteTotalTimeoutMultiplier=MAXDWORD;TimeOuts.WriteTotalTimeoutConstant=10000;SetCommTimeouts(gComHandle,&TimeOuts); //设置超时GetCommState(gComHandle,&dcb);dcb.BaudRate=115200; //波特率为115200dcb.ByteSize=8; //每个字节有8位dcb.Parity=NOPARITY; //无奇偶校验位dcb.StopBits=ONESTOPBIT; //SetCommState(gComHandle,&dcb);return TRUE;}int ComSent(char * packet,int len){char buf[6];BOOL result;size_t lens;size_t sendlen;int i;buf[0] = STX;buf[1] = (unsigned char)(((((len / 1000) % 10) << 4) & 0xf0) | (((len / 100) % 10) & 0x0f));buf[2] = (unsigned char)(((((len / 10) % 10) << 4) & 0xf0) | ((len % 10) & 0x0f));buf[3] = ETX;buf[4] = ETX;buf[5] = '\r';for(i = 0; i < len; i++)buf[4] ^= packet[i]; buf[4] ^= buf[1];buf[4] ^= buf[2];result=WriteFile(gComHandle,buf,3,&sendlen,NULL);//FlushFileBuffers(gComHandle);if(result==0){LogToFile("发送数据失败1");return -1;}else{if(sendlen != 3)return -1;}result=WriteFile(gComHandle,packet,len,&sendlen,NULL);FlushFileBuffers(gComHandle);if(result==0){LogToFile("发送数据失败2");return -1;}else{if(sendlen != len)return -1;}result=WriteFile(gComHandle,buf+3,2,&sendlen,NULL);// PurgeComm(gComHandle, PURGE_RXCLEAR | PURGE_RXABORT | PURGE_TXABORT | PURGE_TXCLEAR );//FlushFileBuffers(gComHandle);if(result==0){LogToFile("发送数据失败1");return -1;}else{if(sendlen != 2)return -1;}return len;}int ComRecv(unsigned char *recvbuf,size_t *recvlen){size_t len;size_t offset;BOOL result;DWORD recivedlen;unsigned char buffer[1024];START:*recvlen=0;offset=0;memset(buffer,0,sizeof(buffer));//LogToFile("%s ", "接收STX");len=1;while(1)//接收STX{recivedlen=0;result=ReadFile(gComHandle,buffer+offset,len,&recivedlen,NULL);if(result==0){LogToFile("接收串口报文失败1");return -1;}else{if(buffer[0]==0x02){len=len-recivedlen;offset+=recivedlen;if(len==0)break;}else{if(buffer[0]!=0x00){LogToFile("%02x",buffer[0]);}continue;}}}//LogToFile("%s ", "接收串口报文2");len=2;while(1){recivedlen=0;result=ReadFile(gComHandle,buffer+offset,len,&recivedlen,NULL);if(result==0){LogToFile("接收串口报文失败2");return -1;}else{len=len-recivedlen;offset+=recivedlen;if(len==0)break;}}//HexLogToFile(&buffer[1], 2);//LogToFile("%s ", "接收data");len=buffer[1]/16*1000+buffer[1]%16*100+buffer[2]/16*10+buffer[2]%16;while(1){recivedlen=0;result=ReadFile(gComHandle,buffer+offset,len,&recivedlen,NULL);if(result==0){LogToFile("接收串口报文失败3");return -1;}else{len=len-recivedlen;offset+=recivedlen;if(len==0)break;}}//HexLogToFile(&buffer[3], offset-3);//LogToFile("%s ", "接收ETX");len=1;while(1){recivedlen=0;result=ReadFile(gComHandle,buffer+offset,len,&recivedlen,NULL);if(result==0){LogToFile("接收ETX失败");return -1;}else{if(recivedlen==1){len=len-recivedlen;if(buffer[offset]!=0x03){LogToFile("校验ETX失败");//return -1;}offset+=recivedlen;if(len==0)break;}else{len=len-recivedlen;offset+=recivedlen;if(len==0)break;}}}//HexLogToFile(&buffer[3], 1);//LogToFile("%s ", "接收LRC");len=1;while(1){recivedlen=0;result=ReadFile(gComHandle,buffer+offset,len,&recivedlen,NULL);if(result==0){LogToFile("接收LRC失败");return -1;}else{if(recivedlen==1){len=len-recivedlen;if(buffer[offset]!=GenLrc(buffer+1,offset-1)){LogToFile("校验LRC失败");//return -1;}offset+=recivedlen;if(len==0)break;}else{len=len-recivedlen;offset+=recivedlen;if(len==0)break;}}}//WriteHexLog(buffer+3, offset-5);if(memcmp(buffer+3,"\x60\x00\x06\x00\x00",5)!=0 &&memcmp(buffer+3,"\x60\x00\x00\x00\x06",5)!=0){buffer[offset-1]=0x00;buffer[offset-2]=0x00;//WriteHexLog(buffer+3, offset-5);LogToFile("%s", buffer+3);goto START;}//LogToFile("%s", "hexbuf");//WriteHexLog(buffer, offset);len=offset-5;memcpy(recvbuf,buffer+3,offset-5);*recvlen=len;return 0;}int main(int argc, char * argv[]){size_t recvlen;char hostname[20];char port[10];BYTE TPDU[5];BYTE com_recvbuf[1024];BYTE buffer[1024];int buffer_len;int result;char str[1024];int len;char ch;if(InitCom()<0)exit(0);printf("请输入工作方式\n发送(s).接收(r)\n");scanf("%c",&ch);if(ch == 's'){while(1){recvlen=0;memset(com_recvbuf,0,sizeof(com_recvbuf));memset(buffer,0,sizeof(buffer));LogToFile("等待串口上送报文");printf("请输入发送的数据\n");scanf("%s",str);len =ComSent(str,strlen(str));LogToFile("数据发送成功");printf("len = %d\n",len);}}else if(ch == 'r'){while(1){LogToFile("等待串口上送报文");ComRecv(com_recvbuf, &recvlen);}}CloseHandle(gComHandle);return 0;}
