济宁阿里云代理商：api函数编写的c++串口通信程序

以下是一个用C++编写的简单串口通信程序，使用API函数实现。这个程序可以打开并进行基本的串口通信操作。

#include <iostream>
#include <Windows.h>

// 串口句柄
HANDLE hSerial;

// 打开串口
bool OpenSerialPort(const char* portName) {
    hSerial = CreateFileA(portName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    
    if (hSerial == INVALID_HANDLE_VALUE) {
        std::cout << "Failed to open the serial port!" << std::endl;
        return false;
    }

    // 配置串口参数
    DCB dcbSerialParams = { 0 };
    dcbSerialParams.DCBlength = sizeof(dcbSerialParams);

    if (!GetCommState(hSerial, &dcbSerialParams)) {
        std::cout << "Failed to get the current serial port parameters!" << std::endl;
        CloseHandle(hSerial);
        return false;
    }

    dcbSerialParams.BaudRate = CBR_9600;  // 设置波特率
    dcbSerialParams.ByteSize = 8;         // 设置数据位数
    dcbSerialParams.StopBits = ONESTOPBIT;  // 设置停止位
    dcbSerialParams.Parity = NOPARITY;     // 设置校验位

    if (!SetCommState(hSerial, &dcbSerialParams)) {
        std::cout << "Failed to configure serial port!" << std::endl;
        CloseHandle(hSerial);
        return false;
    }

    // 设置读写超时时间
    COMMTIMEOUTS timeouts = { 0 };
    timeouts.ReadIntervalTimeout = 50;
    timeouts.ReadTotalTimeoutConstant = 50;
    timeouts.ReadTotalTimeoutMultiplier = 10;
    timeouts.WriteTotalTimeoutConstant = 50;
    timeouts.WriteTotalTimeoutMultiplier = 10;

    if (!SetCommTimeouts(hSerial, &timeouts)) {
        std::cout << "Failed to set serial port timeouts!" << std::endl;
        CloseHandle(hSerial);
        return false;
    }

    return true;
}

// 关闭串口
void CloseSerialPort() {
    CloseHandle(hSerial);
}

// 发送数据
bool WriteData(const unsigned char* data, unsigned int dataSize) {
    DWORD bytesWritten;
    
    if (!WriteFile(hSerial, data, dataSize, &bytesWritten, NULL)) {
        std::cout << "Failed to write data to serial port!" << std::endl;
        return false;
    }

    std::cout << "Successfully written " << bytesWritten << " bytes to serial port." << std::endl;
    return true;
}

// 读取数据
bool ReadData(unsigned char* buffer, unsigned int bufferSize, unsigned int& bytesRead) {
    if (!ReadFile(hSerial, buffer, bufferSize, reinterpret_cast<LPDWORD>(&bytesRead), NULL)) {
        std::cout << "Failed to read data from serial port!" << std::endl;
        return false;
    }
    
    std::cout << "Successfully read " << bytesRead << " bytes from serial port." << std::endl;
    return true;
}

int main() {
    const char* portName = "COM1";

    if (OpenSerialPort(portName)) {
        unsigned char data[] = { 0x01, 0x02, 0x03 };
        
        if (WriteData(data, sizeof(data))) {
            unsigned char buffer[256];
            unsigned int bytesRead;
            
            if (ReadData(buffer, sizeof(buffer), bytesRead)) {
                // 处理读取到的数据
                
                for (unsigned int i = 0; i < bytesRead; i++) {
                    std::cout << "Received data: 0x" << std::hex << static_cast<int>(buffer[i]) << std::dec << std::endl;
                }
            }
        }
        
        CloseSerialPort();
    }

    return 0;
}

请注意，这只是一个简单的例子，可能需要根据你的具体需求进行修改和扩展。

以下是一个基于C++的串口通信程序的示例：

#include <iostream>
#include <Windows.h>

// 打开串口
HANDLE OpenSerialPort(const char* portName)
{
    HANDLE hSerial = CreateFileA(portName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    if (hSerial == INVALID_HANDLE_VALUE)
    {
        std::cerr << "Failed to open serial port." << std::endl;
        return NULL;
    }

    DCB dcbSerialParams = { 0 };
    dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
    if (!GetCommState(hSerial, &dcbSerialParams))
    {
        std::cerr << "Failed to get serial port state." << std::endl;
        CloseHandle(hSerial);
        return NULL;
    }

    dcbSerialParams.BaudRate = CBR_9600;  // 设置波特率为9600
    dcbSerialParams.ByteSize = 8;         // 设置数据位为8位
    dcbSerialParams.StopBits = ONESTOPBIT; // 设置停止位为1位
    dcbSerialParams.Parity = NOPARITY;     // 设置奇偶校验位为无校验

    if (!SetCommState(hSerial, &dcbSerialParams))
    {
        std::cerr << "Failed to set serial port state." << std::endl;
        CloseHandle(hSerial);
        return NULL;
    }

    return hSerial;
}

// 关闭串口
void CloseSerialPort(HANDLE hSerial)
{
    CloseHandle(hSerial);
}

// 读取串口数据
bool ReadSerialPort(HANDLE hSerial, char* buffer, int bufferSize, DWORD* bytesRead)
{
    if (!ReadFile(hSerial, buffer, bufferSize, bytesRead, NULL))
    {
        std::cerr << "Failed to read serial port." << std::endl;
        return false;
    }

    return true;
}

// 写入串口数据
bool WriteSerialPort(HANDLE hSerial, const char* data, int dataSize, DWORD* bytesWritten)
{
    if (!WriteFile(hSerial, data, dataSize, bytesWritten, NULL))
    {
        std::cerr << "Failed to write serial port." << std::endl;
        return false;
    }

    return true;
}

int main()
{
    const char* portName = "COM1"; // 串口名

    HANDLE hSerial = OpenSerialPort(portName);
    if (!hSerial)
    {
        return 1;
    }

    char buffer[256]; // 读取缓冲区
    DWORD bytesRead = 0;

    if (!ReadSerialPort(hSerial, buffer, sizeof(buffer), &bytesRead))
    {
        CloseSerialPort(hSerial);
        return 1;
    }

    std::cout << "Received: " << buffer << std::endl;

    const char* sendData = "Hello, serial port!";

    DWORD bytesWritten = 0;
    if (!WriteSerialPort(hSerial, sendData, strlen(sendData), &bytesWritten))
    {
        CloseSerialPort(hSerial);
        return 1;
    }

    std::cout << "Sent: " << sendData << std::endl;

    CloseSerialPort(hSerial);

    return 0;
}

该示例中，OpenSerialPort函数用于打开指定的串口，参数为串口名称字符串。CloseSerialPort函数用于关闭已打开的串口。ReadSerialPort函数用于从串口读取数据，参数为读取缓冲区、缓冲区大小和读取到的字节数。WriteSerialPort函数用于写入数据到串口，参数为要发送的数据、数据大小和写入的字节数。

在主函数中，程序首先调用OpenSerialPort函数打开COM1串口，然后调用ReadSerialPort函数从串口中读取数据并输出。接着，程序使用WriteSerialPort函数向串口发送数据，并输出发送的数据。最后，程序调用CloseSerialPort函数关闭串口。

需要注意的是，本示例仅适用于Windows操作系统。如果在其他操作系统上运行，需要使用相应的串口通信库或方法。