win32 读取串口数据 

 1 #include <Windows.h>
 2 #include <iostream>
 3 #include <string>
 4 #include <stdio.h>
 5 
 6 using namespace std;
 7 int main()
 8 {
 9 
10     //全局变量，串口句柄
11     HANDLE hCom = CreateFile(L"COM3", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
12     if (hCom == (HANDLE)-1)
13     {
14         printf_s("打开COM失败!");
15         return FALSE;
16     }
17     else
18     {
19         SetupComm(hCom, 1024, 1024); //输入缓冲区和输出缓冲区的大小都是1024
20         COMMTIMEOUTS TimeOuts;
21         //设定读超时
22         TimeOuts.ReadIntervalTimeout = 1000;
23         TimeOuts.ReadTotalTimeoutMultiplier = 500;
24         TimeOuts.ReadTotalTimeoutConstant = 5000;
25         //设定写超时
26         TimeOuts.WriteTotalTimeoutMultiplier = 500;
27         TimeOuts.WriteTotalTimeoutConstant = 2000;
28         SetCommTimeouts(hCom, &TimeOuts); //设置超时
29 
30         DCB dcb;
31         GetCommState(hCom, &dcb);
32         dcb.BaudRate = 115200; //波特率为9600
33         dcb.ByteSize = 8; //每个字节有8位
34         dcb.Parity = NOPARITY; //无奇偶校验位
35         dcb.StopBits = TWOSTOPBITS; //两个停止位
36         SetCommState(hCom, &dcb);
37 
38         PurgeComm(hCom, PURGE_TXCLEAR | PURGE_RXCLEAR);
39         FILE* fd;
40         while (true)
41         {
42             //同步读串口
43             char str[256] = { 0x00 };
44             DWORD wCount;//读取的字节数
45             BOOL bReadStat;
46             bReadStat = ReadFile(hCom, str, sizeof(str), &wCount, NULL);
47             if (!bReadStat)
48             {
49                 printf_s("读串口失败!");
50                 return FALSE;
51             }
52             else
53             {
54                 printf_s("%s\n", str);
55                 fd = fopen("log.txt", "a+");
56                 fwrite(str, sizeof(str), strlen(str), fd);
57             }
58             Sleep(100);
59         }
60         //fclose(fd);
61     }
62     system("pause");
63     return 0;
64 }

 

posted @ 2023-08-04 16:52  微笑的''80  阅读(95)  评论(0)    收藏  举报