ChatGPT win下C语言串口通信

关键词：win环境 C语言 串口通信 ChatGPT

1.ChatGPT

- com<=com9可以用直接赋值 COMx
- com>com9需要  \\\\.\\COMx
重点//eg:COM1，COM2 ······,  COM10 use \\\\.\\COM10

ChatGPT：Write a serial communication using c in win

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

int main()
{
    HANDLE hSerial;
    DCB dcbSerialParams = {0};
    COMMTIMEOUTS timeouts = {0};
    char port[] = "COM1"; // specify the COM port you want to use
    DWORD bytes_written, bytes_read;
    char data[] = "Hello world!"; // data to send
    char incoming_data[256]; // buffer to store incoming data
    int i;

    // open the serial port
    hSerial = CreateFile(port, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
    if (hSerial == INVALID_HANDLE_VALUE) {
        printf("Error opening serial port.\n");
        return 1;
    }

    // set the serial port parameters
    dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
    if (!GetCommState(hSerial, &dcbSerialParams)) {
        printf("Error getting serial port state.\n");
        CloseHandle(hSerial);
        return 1;
    }
    dcbSerialParams.BaudRate = CBR_9600;
    dcbSerialParams.ByteSize = 8;
    dcbSerialParams.StopBits = ONESTOPBIT;
    dcbSerialParams.Parity = NOPARITY;
    if (!SetCommState(hSerial, &dcbSerialParams)) {
        printf("Error setting serial port state.\n");
        CloseHandle(hSerial);
        return 1;
    }

    // set the timeouts
    timeouts.ReadIntervalTimeout = 50;
    timeouts.ReadTotalTimeoutConstant = 50;
    timeouts.ReadTotalTimeoutMultiplier = 10;
    timeouts.WriteTotalTimeoutConstant = 50;
    timeouts.WriteTotalTimeoutMultiplier = 10;
    if (!SetCommTimeouts(hSerial, &timeouts)) {
        printf("Error setting timeouts.\n");
        CloseHandle(hSerial);
        return 1;
    }

    // send data
    if (!WriteFile(hSerial, data, sizeof(data), &bytes_written, NULL)) {
        printf("Error writing to serial port.\n");
        CloseHandle(hSerial);
        return 1;
    }
    printf("Sent %d bytes: %s\n", bytes_written, data);

    // read incoming data
    if (!ReadFile(hSerial, incoming_data, sizeof(incoming_data), &bytes_read, NULL)) {
        printf("Error reading from serial port.\n");
        CloseHandle(hSerial);
        return 1;
    }
    printf("Received %d bytes: ", bytes_read);
    for (i = 0; i < bytes_read; i++) {
        printf("%c", incoming_data[i]);
    }
    printf("\n");

    // close the serial port
    CloseHandle(hSerial);

    return 0;
}

2.对ChatGPT进行代码封装

main.c

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

#include "serial.h"

int main()
{
    const char* com = "\\\\.\\COM10";
    char data[] = "maosql\r\nHello world!\r\n"; // data to send


    wq_open_serial_port(com, CBR_115200);

    wq_serial_port_write(data, sizeof(data));

    wq_serial_port_read();

    wq_close_serial_port();
}

• serial.h

#ifndef __SERIAL_H__
#define __SERIAL_H__

HANDLE wq_open_serial_port(const char* com, int BaudRate);

void wq_close_serial_port(void);

HANDLE wq_serial_port_write(char* data, UINT32 date_len);

HANDLE wq_serial_port_read(void);

#endif

• serial.c

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

HANDLE hSerial;
HANDLE comHandle = INVALID_HANDLE_VALUE;
DWORD bytes_written, bytes_read;
char incoming_data[256]; // buffer to store incoming data

/*
 * param com:       //eg:COM1，COM2 , >COM9 use \\\\.\\COMx
 * param BaudRate:  //Common value：CBR_9600、CBR_19200、CBR_38400、CBR_115200、CBR_230400、CBR_460800
 */
HANDLE wq_open_serial_port(const char* com, int BaudRate)
{
    DCB dcbSerialParams = { 0 };
    COMMTIMEOUTS timeouts = { 0 };

    // open the serial port
    hSerial = CreateFile(com, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
    if (hSerial == INVALID_HANDLE_VALUE) {
        printf("Error opening serial port.\n");
        return comHandle;
    }

    // get the serial port parameters
    dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
    if (!GetCommState(hSerial, &dcbSerialParams)) {
        printf("Error getting serial port state.\n");
        CloseHandle(hSerial);
        return comHandle;
    }
    dcbSerialParams.BaudRate = BaudRate;
    dcbSerialParams.Parity = NOPARITY;
    dcbSerialParams.ByteSize = 8;
    dcbSerialParams.StopBits = ONESTOPBIT;

    // set the serial port parameters
    if (!SetCommState(hSerial, &dcbSerialParams)) {
        printf("Error setting serial port state.\n");
        CloseHandle(hSerial);
        return comHandle;
    }

    // set the timeouts
    timeouts.ReadIntervalTimeout = 50;
    timeouts.ReadTotalTimeoutConstant = 50;
    timeouts.ReadTotalTimeoutMultiplier = 10;
    timeouts.WriteTotalTimeoutConstant = 50;
    timeouts.WriteTotalTimeoutMultiplier = 10;
    if (!SetCommTimeouts(hSerial, &timeouts)) {
        printf("Error setting timeouts.\n");
        CloseHandle(hSerial);
        return comHandle;
    }

    return 0;
}

void wq_close_serial_port(void)
{
    // close the serial port
    CloseHandle(hSerial);
}

HANDLE wq_serial_port_write(char* data, UINT32 date_len)
{
    // send data
    if (!WriteFile(hSerial, data, date_len, &bytes_written, NULL)) {
        printf("Error writing to serial port.\n");
        CloseHandle(hSerial);
        return comHandle;
    }
    printf("Sent %d bytes: %s\n", bytes_written, data);

    return 0;
}

HANDLE wq_serial_port_read(void)
{
    UINT32 i;
    // read incoming data
    if (!ReadFile(hSerial, incoming_data, sizeof(incoming_data), &bytes_read, NULL)) {
        printf("Error reading from serial port.\n");
        CloseHandle(hSerial);
        return comHandle;
    }
    printf("Received %d bytes: ", bytes_read);
    for (i = 0; i < bytes_read; i++) {
        printf("%c", incoming_data[i]);
    }
    printf("\n");

    return 0;
}