c调用Windows API串口通信
想要向串口发送命令，显示串口的返回结果，但是我的程序读串口读出来的数据不是我想要的！！！！有对这方面熟悉的前辈指点下，谢谢！！）
#include <stdio.h>#include <windows.h>int main(void){ int i,w; char readBuffer[100]; char lpOutBuffer[6]={0x23,0x30,0x31,0x30,0x0d,0x0a};\\向串口发出的命令 输入#010---->返回(>+03.267) DWORD dwBytesWrite=100; COMSTAT ComStat; DWORD dwErrorFlags; TCHAR str[100]; DWORD nWantRead=100; DWORD nReadRead; //LPOVERLAPPED m_OverlappedRead; int s; DWORD i_size=1024; DWORD o_size=1024; HANDLE hCom=CreateFile("COM1",GENERIC_READ | GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL); if(hCom == INVALID_HANDLE_VALUE) { MessageBox(NULL,"打开串口失败！！","OK",MB_OK); } MessageBox(NULL,"打开串口成功！！","连接7017",MB_OK); if(!SetupComm(hCom,1024,1024)) { printf("设置缓冲区失败！！\n"); //CloseHandle(hCom); return -1; } printf("设置缓冲区成功！！\n"); COMMTIMEOUTS TimeOuts; TimeOuts.ReadIntervalTimeout=100; TimeOuts.ReadTotalTimeoutMultiplier=100; TimeOuts.ReadTotalTimeoutConstant=1000; TimeOuts.WriteTotalTimeoutMultiplier=50; TimeOuts.WriteTotalTimeoutConstant=2000; SetCommTimeouts(hCom,&TimeOuts); PurgeComm(hCom,PURGE_TXCLEAR|PURGE_RXCLEAR); ///////////////////////////////////////////// //设置波特率 DCB dcb; GetCommState(hCom, &dcb); dcb.BaudRate = CBR_9600; //波特率 dcb.ByteSize = 8; // number of bits/byte, 4-8 指定端口当前使用的数据位 dcb.Parity = 0; // 0-4=no,odd,even,mark,space 指定端口当前使用的奇偶校验方法 dcb.StopBits = 1; //指定端口当前使用的停止位数 SetCommState(hCom,&dcb); //写数据 w=WriteFile(hCom,lpOutBuffer,dwBytesWrite,& dwBytesWrite,NULL); if(!w) { MessageBox(NULL,"写串口失败！！","连接7017",MB_OK); return; } MessageBox(NULL,"写串口成功！！","连接7017",MB_OK); Sleep(100); PurgeComm(hCom,PURGE_TXCLEAR); ClearCommError(hCom,&dwErrorFlags,&ComStat); //读缓冲区的数据 s=ReadFile(hCom,readBuffer,50,&nReadRead, NULL); printf("%d\n",s); if(s==0) { MessageBox(NULL,"读取串口失败！！","连接7017",MB_OK); return; } else MessageBox(NULL,"读取串口成功！！","连接7017",MB_OK); for(i=0;i<25;i++) { printf("%d\n",readBuffer[i]); } CloseHandle(hCom); system("PAUSE"); }