c 获取串口号 c 自动获取串口号

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参考技术A

用C怎么写获取串口的内容

看驱动程序的接口啊

一般是是open(“口名”)

用C/C++写一个小程序读取串口接收到的数据

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 */

/* [goman89] */

#include

#include

#include

/* 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 mand 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 */

GetmState(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;

SetmState(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;

C语言变成实现串口收发数据

#include 

#include 

int main(void)

FILE *fp;

char temp;

char buf[100];

if((fp = fopen("3","r")) == NULL)

puts("this way doesn\'t work!\\n");

else

puts("this way works!\\n");

while(1)

temp = 0;

fscanf(fp,"%c",&temp);

if(temp != 0)

putchar(temp);

else

Sleep(100);

fclose(fp);

return 0;

以前弄的，好久没看了，不知到对不对。

还有下面这段：

#include 

#include 

HANDLE h;

int main(void)

h=CreateFile(TEXT("COM3"),//COM1口

GENERIC_READ|GENERIC_WRITE, //允许读和写

0, //独方式

NULL,

OPEN_EXISTING, //打开而不是创建

0, //同步方式

NULL);

if(h==(HANDLE)-1)

printf("打开COM失败!\\n");

return FALSE;

else

printf("COM打开成功！\\n");

Setupm(h,1024,1024); //输入缓冲区和输出缓冲区大小都是1024

COMMTIMEOUTS TimeOuts;

//设读超时

TimeOuts.ReadIntervalTimeout=1000;

TimeOuts.ReadTotalTimeoutMultiplier=500;

TimeOuts.ReadTotalTimeoutConstant=5000;

//设定写超时

TimeOuts.WriteTotalTimeoutMultiplier=500;

TimeOuts.WriteTotalTimeoutConstant=2000;

SetmTimeouts(h,&TimeOuts); //设置超时

DCB dcb;

GetmState(h,&dcb);

dcb.BaudRate=9600; //波特率为9600

dcb.ByteSize=8; //每个字节有8位

dcb.Parity=NOPARITY; //无奇偶校验位

dcb.StopBits=ONE5STOPBITS; //两个停止位

SetmState(h,&dcb);

DWORD wCount;//读取的节数

BOOL bReadStat;

while(1)

Purgem(h,PURGE_TXCLEAR|PURGE_RXCLEAR); //清缓冲区

char str[9]=0;

printf("%s\\n",str);

bReadStat=ReadFile(h,str,9,&wCount,NULL);

if(!bReadStat)

printf("

怎么通过串口读取51单片机某个地址的数据？请用C语言写出来。

*

授人以鱼,不如授人以渔

*

首先，你要明确在C语中读取内存址是基于指针。

3.比如读取内存地址0x22中的数据

C语言中对于内存的访是基于指，这个毋庸置疑，具体操如下

unsigned int *p= （unsigned int*）0x22 ；//定义针，并且使指针指向了0x22这个        内存地址；

那么*p就是最终你要读取的数据了。

4.至于如何通过串口显示到电脑我就不多了（这不是难点），据你都知道了，写到串口   缓冲区，在串口调试助手下就可以看到。

5.虽然没有贴出具体代码，但这里面的思想可以让你解决

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Linux下如何使用c/c++实现检测新增串口，并读取串口号

Linux下面有设文件

串口装好驱动后 会显示在dev下

然后对这个

C语言中如何对串口进行操作

C语言会有操作串口的库函数的，按照串口库数标识实现调

电脑上的串口号是什么意思

串口叫做串行接口,也串行通信接口,按电气标准及协议来分包括RS-232-C、RS-422、RS485、USB等。 RS-232-C、RS-422与RS-485标准对接口的电气特性做出规定,不涉及接插件、电缆或协议。USB是近几年发展起来的新型接口标准,主要应用于速数据传输域。 RS-232-C:也称标准串口,是目前最常用的一种串行通讯接口。它是在1970年由美国电子工业协会(EIA)联合贝尔系统、 调制解调器厂家及计算机终端生产厂共同制定的用于串行通讯的标 准。它的名是“数据终端设备(DTE)和数据通讯设备(DCE)之间 行二进制数据交换接口技术标准”。传统的RS-232-C接口标准有22根线,采用标准25芯D型插头座。后来的PC上使用简化了的9芯D插座。现在应用中25芯插头已很少采用。现在的电脑般有两个串行口:COM1和COM2,你到计算机后面能看到9针D形接口就是了。现在有很多手数据线或者物流接收器都采用COM

如何用C语言写一个读、写串口的程序？

大致过程就是

配置串口通信，包串口号、波特、验位、停止位这些信息；

打开串口，和打开文件一样，在Linux是这样，Windows下没试过，估计也差不多；

发送数据，即写串口，就跟写文件类似；

读取

编写单片机串口收发数据的完整程序（C语言编写）

我用的新唐芯片，8051内核，跟51差不多，望采纳

void UART_Initial (void)

P02_Quasi_Mode; //Setting UART pin as Quasi mode for tran *** it

P16_Quasi_Mode; //Setting UART pin as Quasi mode for tran *** it

SCON_1 = 0x50; //UART1 Mode1,REN_1=1,TI_1=1

T3CON = 0x08; //T3PS2=0,T3PS1=0,T3PS0=0(Prescale=1), UART1 in MODE 1

clr_BRCK;

RH3 = HIBYTE(65536 - (1000000/u32Baudrate)-1); /*16 MHz */

RL3 = LOBYTE(65536 - (1000000/u32Baudrate)-1); /*16 MHz */

set_TR3; //Trigger Timer3

以上是初始化的

void Send_Data_To_UART1(UINT8 c)

TI_1 = 0;

SBUF_1 = c;

while(TI_1==0);

这个是发送

void UART_isr (void) interrupt 4 //

怎样在WINDOWS下用C语言编写串口接收数据程序

#include

#include

int main(void)

FILE *fp;

char temp;

char buf[100];

if((fp = fopen("3","r")) == NULL)

puts("this way doesn\'t work!\\n");

else

puts("this way works!\\n");

while(1)

temp = 0;

fscanf(fp,"%c",&temp);

if(temp != 0)

putchar(temp);

else

Sleep(100);

fclose(fp);

return 0;

以前的，好久看，不知到对不对。

还下面这段：

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#include

#include

HANDLE h;

int main(void)

h=CreateFile(TEXT("COM3"),//COM1口

GENERIC_READ|GENERIC_WRITE, //允许读和写

0, //独占方式

NULL,

OPEN_EXISTING, //打开而不是建

0, //同步式

NULL);

if(h==(HANDLE)-1)

printf("打开COM失败!\\n");

return FALSE;

else

printf("COM打开成功！\\n");

Setupm(h,1024,1024); //输入缓冲区和输出缓冲区的大小都是1024

COMMTIMEOUTS TimeOuts;

//定读超时

TimeOuts.ReadIntervalTimeout=1000;

TimeOuts.ReadTotalTimeoutMultiplier=500;

TimeOuts.ReadTotalTimeoutConstant=5000;

//设定写超时

TimeOuts.WriteTotalTimeoutMultiplier=500;

TimeOuts.WriteTotalTimeoutConstant=2000;

SetmTimeouts(h,&TimeOuts); //设置超时

DCB dcb;

GetmState(h,&dcb);

dcb.BaudRate=9600; //波特率为9600

dcb.ByteSize=8; //每个字节有8位

dcb.Parity=NOPARITY; //无奇偶校验位

dcb.StopBits=ONE5STOPBITS; //两个停止位

SetmState(h,&dcb);

DWORD wCount;//读取的字节

BOOL bReadStat;

while(1)

Purgem(h,PURGE_TXCLEAR|PURGE_RXCLEAR); //清空缓冲区

char str[9]=0;

printf("%s\\n",str);

bReadStat=ReadFile(h,str,9,&wCount,NULL);

if(!bReadStat)

printf("读串口

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