Question

我正在尝试用C ++编写Pi的基本天气监测站，我有2个传感器写成类，我正在尝试做一个基本程序来实现这些类并测试它们是否按预期运行。当我尝试构建项目时Eclipse回复时出现以下错误消息，这使我认为我没有正确地包含我的头文件或其他东西。

./src/HelloWorld.o: In function `main':
/Debug/../src/HelloWorld.cpp:30: undefined reference to `pressureSensor::pressureSensor()'
/Debug/../src/HelloWorld.cpp:31: undefined reference to `temperatureSensor::temperatureSensor()'
/Debug/../src/HelloWorld.cpp:34: undefined reference to `pressureSensor::getReading()'
/Debug/../src/HelloWorld.cpp:31: undefined reference to `temperatureSensor::~temperatureSensor()'
/Debug/../src/HelloWorld.cpp:41: undefined reference to `pressureSensor::~pressureSensor()'
/Debug/../src/HelloWorld.cpp:31: undefined reference to `temperatureSensor::~temperatureSensor()'
/Debug/../src/HelloWorld.cpp:41: undefined reference to `pressureSensor::~pressureSensor()'
collect2: error: ld returned 1 exit status

这是项目的directory structure：

/workspaces
 - /src
   - /HelloWorld.cpp
 - /Sensors
   - /temperature.h
   - /temperature.cpp
   - /pressure.h
   - /pressure.cpp

以下是有问题的文件：

/src/HelloWorld.cpp

#include <iostream>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <cerrno>
#include <wiringPi.h>
#include <wiringPiI2C.h>
#include "../Sensors/pressure.h"
#include "../Sensors/temperature.h"

using namespace std;

int main(void) {

    if (wiringPiSetup()) {
        cout << "wiringPi is tangled, exiting." << endl;
    } else {
        cout << "wiringPi is untangled and ready." << endl;
    }

    pinMode(0, INPUT);
    pinMode(1, INPUT);

    pullUpDnControl(0, PUD_UP);
    pullUpDnControl(1, PUD_UP);

    pressureSensor pressure;
    temperatureSensor temperature;

    for (int i = 0; i < 5; i++) { 
            cout << pressure.getReading() << endl;
        cout << "GPIO 17: " << digitalRead(0) << endl;
        cout << "GPIO 18: " << digitalRead(1) << endl;
        cout << endl;
        usleep(150000);
    }

    return 0;

}

/Sensors/pressure.h

#ifndef PRESSURE_H_
#define PRESSURE_H_
#include "../BMP180/BMP180.h"

class pressureSensor {
public:
    pressureSensor();
    ~pressureSensor();
    int getReading();

private:
    SFE_BMP180 pressure;
      char status;
      double T,P,p0,a;
};

#endif /* PRESSURE_H_ */

/Sensors/temperature.h

#ifndef TEMPERATURE_H_
#define TEMPERATURE_H_

#define TMP102_ADDR 0x48
#define TMP102_CFGPTR1 0x01
#define TMP102_CFGREG1 0x61
#define TMP102_CFGREG2 0xA0
#define TMP102_CFGREGSO 0xE1

class temperatureSensor {
public:
    temperatureSensor();
    ~temperatureSensor();
    float getReading();

private:
    int TMPdevID;

};

#endif /* TEMPERATURE_H_ */

如何配置Eclipse以构建和链接其他自定义库？

0 个答案: