1 #define _CRT_SECURE_NO_WARNINGS
  2 #include <stdio.h>
  3 #include <Windows.h>
  4 #include <atlstr.h>
  5 #include <strsafe.h>
  6 #include <crtdbg.h>
  7 
  8 int FILESIZE = 16;
  9 char szStr[5] = "com3";
 10 
 11 
 12 
 13 DWORD WriteFileContent(LPCWSTR szFilePath,DCB dcb)
 14 {
 15     HANDLE hFile;
 16     
 17     BYTE lpFileDataBuffer[1024];
 18     //lpFileDataBuffer[0] = 0xff;
 19     //lpFileDataBuffer[1] = 0xff;
 20     DWORD dwWritedSize = 0;
 21     DWORD dwWritedSizes;
 22     int i = 0;
 23     int ByteSize = 0;
 24 
 25     hFile = CreateFile(szFilePath,
 26         GENERIC_WRITE,
 27         FILE_SHARE_READ,
 28         NULL,
 29         OPEN_ALWAYS,
 30         FILE_ATTRIBUTE_NORMAL,
 31         NULL
 32     );
 33     if (hFile == INVALID_HANDLE_VALUE)
 34     {
 35         printf("打开文件失败!\n");
 36         exit(-1);
 37     }
 38 
 39     /*
 40         DCB配置
 41     */
 42     if (!SetCommState(hFile, &dcb))
 43     {
 44         printf("BCD配置设置失败!");
 45         CloseHandle(hFile);
 46         exit(-1);
 47     }
 48 
 49     while (1)
 50     {
 51         printf("请输入数据字节数，0则退出写入:\n>> ");
 52         scanf("%d", &ByteSize);
 53 
 54         if (ByteSize == 0)
 55         {
 56             //CloseHandle(hFile);
 57             //return 0;
 58             break;
 59         }
 60             
 61         printf("请输入数据，其间空格隔开:\n>> ");
 62         for (i = 0; i < ByteSize; i++)
 63         {
 64             scanf("%x", &lpFileDataBuffer[dwWritedSize++]);
 65         }
 66 
 67         dwWritedSize = ByteSize;
 68 
 69         if (!WriteFile(hFile,
 70             lpFileDataBuffer,
 71             dwWritedSize,
 72             &dwWritedSizes,
 73             NULL))
 74         {
 75             printf("写入文件错误: %d\n", GetLastError());
 76             break;
 77         }
 78         printf("写入%d字节\n>> ", dwWritedSize);
 79 
 80 
 81         for (i = 0; i < dwWritedSize; i++)
 82         {
 83             printf("%x ", lpFileDataBuffer[i]);
 84         }
 85         printf("\n");
 86         dwWritedSize = 0;
 87 
 88         Sleep(1000);
 89     }
 90     CloseHandle(hFile);
 91     return dwWritedSize;
 92 }
 93 
 94 DWORD ReadFileContent(LPCWSTR szFilePath, DCB dcb)
 95 {
 96     HANDLE hFile;
 97 
 98     BYTE lpFileDataBuffer[1024];
 99     DWORD dwReadedSize;
100     DWORD i;
101     DWORD Time = 0;
102 
103     
104 
105     hFile = CreateFile(szFilePath,
106         GENERIC_READ,
107         FILE_SHARE_WRITE,
108         NULL,
109         OPEN_EXISTING,
110         FILE_ATTRIBUTE_NORMAL,
111         NULL);
112     
113     if (hFile == INVALID_HANDLE_VALUE)
114     {
115         printf("打开文件失败!\n");
116         exit(-1);
117     }
118 
119     /*
120         DCB配置
121     */
122     if (!SetCommState(hFile, &dcb))
123     {
124         printf("BCD配置设置失败!");
125         CloseHandle(hFile);
126         exit(-1);
127     }
128 
129     /*
130         设置超时
131     */
132     COMMTIMEOUTS timeOver;
133     memset(&timeOver, 0, sizeof(timeOver));
134     DWORD timeMultiplier = 100, timeConstant = 5000;
135     timeOver.ReadTotalTimeoutMultiplier = timeMultiplier;
136     timeOver.ReadTotalTimeoutConstant = timeConstant;
137     SetCommTimeouts(hFile, &timeOver);
138     
139 
140     while (1)
141     {
142         if (!ReadFile(hFile,
143             lpFileDataBuffer,
144             FILESIZE,
145             & dwReadedSize,
146             NULL))
147         {
148             printf("读取文件错误: %d\n", GetLastError());
149             break;
150         }
151         printf("读取%d字节\n>> ",dwReadedSize);
152         if (dwReadedSize == 0)
153         {
154             ++Time;
155             if (Time == 1)
156             {
157                 printf("读取数据停止!\n");
158                 break;
159             }
160         }
161         else
162         {
163             printf("读取%d字节\n>> ", dwReadedSize);
164         }
165         
166         for (i = 0; i < dwReadedSize; i++)
167         {
168             printf(" %x ", lpFileDataBuffer[i]);
169         }
170         printf("\n");
171 
172         Sleep(1000);
173     }
174     CloseHandle(hFile);
175     return 0;
176 }
177 
178 void SetDcb(DCB* dcb)
179 {
180     /*
181         DCB结构配置
182         BauRate        (波特率)
183         fParity        (指定奇偶校验位)
184         Parity        (校验方式)
185         ByteSize    (数据位个数)
186         StopBits    (停止位个数)
187     */
188     int No = 0;
189 
190     dcb->DCBlength = sizeof(DCB);
191 
192     while (1)
193     {
194         printf("  DCB结构配置\n");
195         printf("0.设置:串口编号\n");
196         printf("1.设置:波特率\n");
197         printf("2.设置:检验方式\n");
198         printf("3.设置:停止位数\n");
199         printf("4.设置:数据位个数\n");
200         printf("5.设置:读取时一组的字节数\n");
201         printf("6.查看:当前结构\n");
202         printf("7.退出\n");
203         printf(">> ");
204 
205         scanf("%d",& No);
206         switch (No) 
207         {
208             case 0:
209             {
210                 printf("请输入串口编号 例如1:\n>> ");
211                 getchar();
212                 scanf("%c", &szStr[3]);
213                 printf("串口编号成功改为:%s\n", szStr);
214                 break;
215             }
216             case 1:
217             {
218                 printf("波特率:\n>> ");
219                 scanf("%d", &dcb->BaudRate);
220                 printf("波特率成功改为:%d\n", dcb->BaudRate);
221                 break;
222             }
223             case 2:
224             {
225                 printf("2 :偶校验    EVENPARITY\n");    //    EVENPARITY
226                 printf("3 :标志校验    MARKPARITY\n");    //    MARKPARITY    
227                 printf("0 :无校验    NOPARITY\n");    //    NOPARITY
228                 printf("1 :奇校验    ODDPARITY\n");    //    ODDPARITY
229                 printf(">> ");
230                 scanf("%d", &dcb->Parity);
231                 printf("校验法成功更改为:%d\n", dcb->Parity);
232                 break;
233             }
234             case 3:
235             {
236                 printf("0 :1停止位        ONESTOPBIT\n");    //    ONESTOPBIT
237                 printf("1 :1.5停止位    ONE5STOPBITS\n");    //    ONE5STOPBITS
238                 printf("2 :2停止位        TWOSTOPBITS\n");    //    TWOSTOPBITS   
239                 printf(">> ");
240                 scanf("%d", &dcb->StopBits);
241                 printf("停止位成功更改为:%d\n", dcb->StopBits);
242                 break;
243             }
244             case 4:
245             {
246                 printf("数据位个数:\n>> ");
247                 scanf("%d", &dcb->ByteSize);
248                 printf("数据位个数成功更改为:%d\n", dcb->ByteSize);
249                 break;
250             }
251             case 5:
252             {
253                 printf("接收时每组字节数设置:\n>> ");
254                 scanf("%d", &FILESIZE);
255                 printf("接收时每组字节数成功更改为:%d", FILESIZE);
256                 break;
257             }
258             case 6:
259             {
260                 printf("  DCB结构配置\n");
261                 printf("0.串口编号        %s\n",szStr);
262                 printf("1.波特率        %d\n", dcb->BaudRate);
263                 printf("2.检验方式        ");//%d\n", dcb->Parity);
264                 switch (dcb->Parity)
265                 {
266                     case 0:
267                     {
268                         printf("NOPARITY    无校验\n");
269                         break;
270                     }
271                     case 1:
272                     {
273                         printf("ODDPARITY    奇校验\n");
274                         break;
275                     }
276                     case 2:
277                     {
278                         printf("EVENPARITY    偶校验\n");
279                         break;
280                     }
281                     case 3:
282                     {
283                         printf("MARKPARITY    标志校验\n");
284                         break;
285                     }
286                 }
287                 
288                 printf("3.停止位数        ");// % d\n", dcb->StopBits);
289                 if (dcb->StopBits == 0)
290                     printf("ONESTOPBIT    1停止位\n");
291                 else if (dcb->StopBits == 1)
292                     printf("ONE5STOPBITS    1.5停止位\n");
293                 else if (dcb->StopBits == 2)
294                     printf("TWOSTOPBITS    2停止位\n");
295                 else
296                     printf("dcb->ByteSize = %d\n", dcb->StopBits);
297 
298                 printf("4.数据位个数        %d    位\n", dcb->ByteSize);
299                 printf("5.字节数        %d    字节\n", FILESIZE);
300                 break;
301             }
302             case 7:
303             {
304                 printf("退出配置\n");
305                 return;
306             }
307             default:
308             {
309                 printf("输入有误\n");
310                 break;
311             }
312         }
313         printf("完毕\n");
314     }
315 
316 }
317 
318 int main()
319 {
320     
321     int Change = 0;
322 
323     DCB dcb;
324     memset(&dcb, 0, sizeof(dcb));
325 
326     /* 
327         将char[]类型转化成LPCWSTR类型
328     */
329 
330     WCHAR wszClassName[8];
331     memset(wszClassName, 0, sizeof(wszClassName));
332     MultiByteToWideChar(CP_ACP, 0, szStr, strlen(szStr) + 1, wszClassName,
333         sizeof(wszClassName) / sizeof(wszClassName[0]));
334 
335     LPCWSTR lpFileName = _T("com3"); //= wszClassName;
336     
337     /*
338         DCB结构配置
339         BauRate        (波特率)
340         fParity        (指定奇偶校验位)
341         Parity        (校验方式)
342         ByteSize    (数据位个数)
343         StopBits    (停止位个数)
344     */
345     printf("DCB结构正在默认配置...");
346     dcb.DCBlength = sizeof(DCB);
347     dcb.BaudRate = 9600;
348     dcb.Parity = 2;
349     dcb.ByteSize = 8;
350     dcb.StopBits = ONESTOPBIT;
351     printf("完成\n");
352 
353     
354 
355     while (1)
356     {    
357         printf("\n  <Win串口读写程序>\n");
358         printf("1.读取数据\n");
359         printf("2.写入数据\n");
360         printf("3.配置DCB结构体\n");
361         printf("4.结束程序\n");
362         printf(">> ");
363         scanf_s("%d", &Change);
364         if (Change == 1)
365         {
366             ReadFileContent(lpFileName,dcb);
367         }
368         else if (Change == 2)
369         {
370             WriteFileContent(lpFileName,dcb);
371         }
372         else if (Change == 3)
373         {
374             SetDcb(&dcb);
375         }
376         else if (Change == 4)
377         {
378             printf("程序结束\n");
379             break;
380         }
381         else
382             printf("输入错误,请重新输入!\n");
383     }
384     
385     return 0;
386 }