C++ 임베디드 시스템 개발의 다양한 기능 구현 기술 및 사례

class MemoryManager {
private:
    char* m_buffer;
    size_t m_size;
    size_t m_offset;

public:
    MemoryManager(size_t size) : m_size(size), m_offset(0) {
        m_buffer = new char[size];
    }
  
    ~MemoryManager() {
        delete[] m_buffer;
    }
  
    void* allocate(size_t size) {
        void* address = m_buffer + m_offset;
        m_offset += size;
        return address;
    }

    void deallocate(void* ptr) {
        // 空实现
    }
};

#include <fstream>

// 读取文件内容
void readFile(const char* filename) {
    std::ifstream file(filename);
    if (file.is_open()) {
        std::string line;
        while (std::getline(file, line)) {
            // 处理一行数据
        }
        file.close();
    }
}

#include <chrono>
#include <thread>
#include <functional>

// 定时器回调函数类型
using TimerCallback = std::function<void()>;

// 定时器管理器
class TimerManager {
public:
    TimerManager() : m_running(false) {}
  
    // 启动定时器
    void start(TimerCallback callback, int interval) {
        m_callback = callback;
        m_interval = std::chrono::milliseconds(interval);
        m_running = true;
        m_thread = std::thread(&TimerManager::timerThread, this);
    }
  
    // 停止定时器
    void stop() {
        m_running = false;
        if (m_thread.joinable()) {
            m_thread.join();
        }
    }

private:
    TimerCallback m_callback;
    std::chrono::milliseconds m_interval;
    std::thread m_thread;
    bool m_running;

    // 定时器线程
    void timerThread() {
        while (m_running) {
            std::this_thread::sleep_for(m_interval);
            if (m_running) {
                m_callback();
            }
        }
    }
};

#include <wiringPi.h>

// 初始化GPIO口
void initGpio() {
    wiringPiSetup();
    pinMode(0, OUTPUT);  // 设置GPIO0为输出模式
}

// 控制GPIO口
void controlGpio(bool value) {
    digitalWrite(0, value ? HIGH : LOW);
}

#include <termios.h>
#include <unistd.h>
#include <fcntl.h>

// 初始化串口
int initUart(const char* device, int baudrate) {
    int fd = open(device, O_RDWR | O_NOCTTY | O_NDELAY);
  
    // 配置串口属性
    struct termios options;
    tcgetattr(fd, &options);
    cfsetispeed(&options, baudrate);
    cfsetospeed(&options, baudrate);
    options.c_cflag |= (CLOCAL | CREAD);
    options.c_cflag &= ~PARENB;
    options.c_cflag &= ~CSTOPB;
    options.c_cflag &= ~CSIZE;
    options.c_cflag |= CS8;
    options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
    options.c_iflag &= ~(IXON | IXOFF | IXANY);
    options.c_oflag &= ~OPOST;
    tcsetattr(fd, TCSANOW, &options);
  
    return fd;
}

// 读取串口数据
int readUart(int fd, char* buffer, int size) {
    return read(fd, buffer, size);
}

// 写入串口数据
int writeUart(int fd, const char* data, int size) {
    return write(fd, data, size);
}

#include <iostream>
#include <wiringPi.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>

// PWM控制器
class PwmController {
private:
    int m_pin;
    int m_dutyCycle;

public:
    PwmController(int pin) : m_pin(pin), m_dutyCycle(0) {
        pinMode(m_pin, PWM_OUTPUT);
        pwmSetMode(PWM_MODE_MS);
        pwmSetClock(400);
    }

    void setDutyCycle(int dutyCycle) {
        m_dutyCycle = dutyCycle;
        pwmWrite(m_pin, m_dutyCycle);
    }
};

// RGB控制器
class RgbController {
private:
    int m_i2cAddress;
    int m_deviceFd;

public:
    RgbController(int i2cAddress) : m_i2cAddress(i2cAddress) {
        m_deviceFd = initI2c("/dev/i2c-1", m_i2cAddress);
    }

    void setColor(int red, int green, int blue) {
        char data[3] = {red, green, blue};
        writeI2c(m_deviceFd, data, sizeof(data));
    }
};

// 初始化I2C设备
int initI2c(const char* device, int address) {
    int fd = open(device, O_RDWR);
    ioctl(fd, I2C_SLAVE, address);
    return fd;
}

// 读取I2C设备数据
int readI2c(int fd, char* buffer, int size) {
    return read(fd, buffer, size);
}

// 写入I2C设备数据
int writeI2c(int fd, const char* data, int size) {
    return write(fd, data, size);
}

int main() {
    wiringPiSetup();

    PwmController ledController(0);
    RgbController rgbController(0x27);

    // 读取用户输入
    int brightness, red, green, blue;
    std::cout << "Enter brightness (0-100): ";
    std::cin >> brightness;
    std::cout << "Enter RGB color (0-255): ";
    std::cin >> red >> green >> blue;

    // 设置LED灯亮度和RGB颜色
    ledController.setDutyCycle(brightness * 10);
    rgbController.setColor(red, green, blue);

    return 0;
}