用C/C++写一个小程序读取串口接收到的数据

Posted 2023-03-18

我希望写一个小程序，能够读取从计算机串口或者USB发送进来的数据。
并且显示数据。数据从单片机传送到计算机上的。
如果有这样的软件最好。
积分就这么多，希望高手不吝赐教。有点急～～～

参考技术A 你太幸运了，刚好我有一个，你在vc++6.0下测试一下。
/* serrecv.c */
/* Receives and saves a file over a serial port */
/* Last modified: Septemeber 21, 2005 */
/* http://www.gomorgan89.com */

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>

/* Function to print out usage information */
void usage(void);

/* Function to set up the serial port settings with the specified baud rate,
no parity, and one stop bit */
void set_up_serial_port(HANDLE h, long baud);

/* Function to receive and save file from serial port */
void get_file_from_serial_port(HANDLE h, char *file_name, unsigned long file_length);

int main(int argc, char **argv)

HANDLE serial_port; /* Handle to the serial port */
long baud_rate = 9600; /* Baud rate */
char port_name[] = "COM1:"; /* Name of serial port */
unsigned long file_size; /* Size of file to receive in bytes */
unsigned long bytes_received; /* Bytes received from serial port */
unsigned long file_name_size; /* Size of file name in bytes */
char file_name[256]; /* Name of file to receive */

/* Check command line */
if (argc == 3)

/* Read in baud rate */
if (argv[1][1] != 'b' || sscanf(argv[2], "%ld", &baud_rate) != 1)

usage();
exit(0);


else if (argc != 1)

usage();
exit(0);


/* Open up a handle to the serial port */
serial_port = CreateFile(port_name, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);

/* Make sure port was opened */
if (serial_port == INVALID_HANDLE_VALUE)

fprintf(stderr, "Error opening port\n");
CloseHandle(serial_port);
exit(0);


/* Set up the serial port */
set_up_serial_port(serial_port, baud_rate);

/* Receive file name size from serial port */
ReadFile(serial_port, (void *)&file_name_size, sizeof(unsigned long), &bytes_received, NULL);
if (bytes_received != sizeof(unsigned long))

fprintf(stderr, "Error getting file name size.\n");
CloseHandle(serial_port);
exit(0);


/* Receive file name from serial port */
ReadFile(serial_port, (void *)file_name, file_name_size, &bytes_received, NULL);
if (bytes_received != file_name_size)

fprintf(stderr, "Error retrieving file name.\n");
CloseHandle(serial_port);
exit(0);


/* Append NULL terminator to end of string */
file_name[bytes_received] = '\0';

/* Receive file size from serial port */
ReadFile(serial_port, (void *)&file_size, sizeof(unsigned long), &bytes_received, NULL);
if (bytes_received != sizeof(unsigned long))

fprintf(stderr, "Error getting file size.\n");
CloseHandle(serial_port);
exit(0);


/* Get the file from the serial port */
get_file_from_serial_port(serial_port, file_name, file_size);

/* Print out success information */
printf("\n%lu bytes successfully received and saved as %s\n", file_size, file_name);

/* Close handle */
CloseHandle(serial_port);

return 0;


void usage(void)

fprintf(stderr, "Usage:\n");
fprintf(stderr, "\tserrecv [-b baud rate]\n");
fprintf(stderr, "\tDefault baud rate is 9600\n");
fprintf(stderr, "tSupported baud rates: 1200, 2400, 4800, 9600, 14400, 19200\n");
return;


void set_up_serial_port(HANDLE h, long baud)

DCB properties; /* Properties of serial port */

/* Get the properties */
GetCommState(h, &properties);

/* Set the baud rate */
switch(baud)

case 1200:
properties.BaudRate = CBR_1200;
break;
case 2400:
properties.BaudRate = CBR_2400;
break;
case 4800:
properties.BaudRate = CBR_4800;
break;
case 9600:
properties.BaudRate = CBR_9600;
break;
case 14400:
properties.BaudRate = CBR_14400;
break;
case 19200:
properties.BaudRate = CBR_19200;
break;
case 38400:
properties.BaudRate = CBR_38400;
break;
default:
fprintf(stderr, "Invalid baud rate: %ld\n", baud);
usage();
exit(0);
break;


/* Set the other properties */
properties.Parity = NOPARITY;
properties.ByteSize = 8;
properties.StopBits = ONESTOPBIT;

SetCommState(h, &properties);

return;


void get_file_from_serial_port(HANDLE h, char *file_name, unsigned long file_length)

FILE *data_file; /* File to create */
unsigned long bytes_left = file_length; /* Bytes left to receive */
unsigned long bytes_received_total = 0; /* Total bytes received */
unsigned long bytes_to_receive; /* Number of bytes to receive */
unsigned long bytes_received; /* Number of bytes receive */
char buffer[200]; /* Buffer to store data */

/* Open the file */
data_file = fopen(file_name, "wb");

/* Quit if file couldn't be opened */
if (data_file == NULL)

fprintf(stderr, "Could not create file %s\n", file_name);
CloseHandle(h);
exit(0);


while (1)

/* Determine how many bytes to read */
if (bytes_left == 0)

break;

else if (bytes_left < 200)

bytes_to_receive = bytes_left;

else

bytes_to_receive = 200;


/* Receive data over serial cable */
ReadFile(h, (void *)buffer, bytes_to_receive, &bytes_received, NULL);
if (bytes_received != bytes_to_receive)

fprintf(stderr, "Error reading file.\n");
CloseHandle(h);
exit(0);


/* Save buffer to file */
fwrite((void *)buffer, 1, bytes_received, data_file);

/* Decrement number of bytes left */
bytes_left -= bytes_received;

/* Increment number of bytes received */
bytes_received_total += bytes_received;

/* Print out progress */
printf("\r%5lu bytes received.", bytes_received_total);


fclose(data_file);

return;
本回答被提问者采纳 参考技术B 有的

很多种

求一个C语言操作串口接受数据的程序，（传感器与电脑连接。需要读取传感器通过串口传歘的数据。）

先有一个传感器，与PC连接，需要读取传感器传传回的数据，跪求大神给你一个C语言操作串口接受数据的程序，感激不尽。

参考技术A 大神舍不得给你

传感器(英文名称:transducer/sensor)是一种检测装置，能感受到被测量的信息，并能将感受到的信息，按一定规律变换成为电信号或其他所需形式的信息输出，以满足信息的传输、处理、存储、显示、记录和控制等要求。
传感器的特点包括:微型化、数字化、智能化、多功能化、系统化、网络化。它是实现自动检测和自动控制的首要环节。传感器的存在和发展，让物体有了触觉、味觉和嗅觉等感官，让物体慢慢变得活了起来。通常根据其基本感知功能分为热敏元件、光敏元件、气敏元件、力敏元件、磁敏元件、湿敏元件、声敏元件、放射线敏感元件、色敏元件和味敏元件等十大类。追问

大神，注意重点

参考技术B 你得注释, 越看头越大, unsigned char fifo_head=0; //往fifo写入数据时的位置unsigned char fifo_tail=0; // 读出fifo时的位置unsigned char Rx1_pos=0; //当前的接收位置unsigned char Rx1_num=0; //数据长度unsigned char Frame_in=