Question

我编写了一个小程序，但是在编译时，如果我使用#include "Temperature.h"和#include "Lcd.h"进行编译，则会收到一条奇怪的错误消息。

但是，如果我删除一个代码，则我的代码可以正常工作，但是如果我两个都删除，则不能。

我知道oneWire和TemperatureSensors被多次定义，但是在我的Lcd.cpp中我不使用它！

sketch/Temperature.cpp.o (symbol from plugin): In function 'oneWire':
(.text+0x0): multiple definition of 'oneWire'
sketch/Lcd.cpp.cpp.o (symbol from plugin):(.text+0x0): first defined here
sketch/Temperature.cpp.o (symbol from plugin): In function 'oneWire':
(.text+0x0): multiple definition of 'TemperatureSensors'
sketch/Lcd.cpp.cpp.o (symbol from plugin):(.text+0x0): first defined here
collect2: error: ld returned 1 exit status
exit status 1
[Error] Exit with code=1

.ino

#include "Temperature.h"
#include "Lcd.h"

#define UP_KEY 13
#define OK_KEY 12
#define DOWN_KEY 11

#define LED_GREEN 2
#define LED_RED 3


void setup() { 
    Serial.begin(9600);
    pinMode(LED_GREEN, OUTPUT);
    pinMode(LED_RED, OUTPUT);

    pinMode(UP_KEY, INPUT_PULLUP);
    pinMode(OK_KEY, INPUT_PULLUP);
    pinMode(DOWN_KEY, INPUT_PULLUP);

    initSensorTemperature();
    numberOfTemperatureSensor();

    initLcd();
}

void loop(){
    digitalWrite(LED_GREEN, HIGH);  
    delay(1000);         
    digitalWrite(LED_GREEN, LOW);  
    delay(1000);
    getTemperature();
}

温度.h

#ifndef Temperature_h
#define Temperature_h

#include <DallasTemperature.h>
#include <OneWire.h>

#define TEMPERATURE_WIRE_BUS 8
#define TEMPERATURE_RESOLUTION 11

OneWire oneWire(TEMPERATURE_WIRE_BUS);
DallasTemperature TemperatureSensors(&oneWire);

void initSensorTemperature();

void numberOfTemperatureSensor();
void getTemperature();

#endif

Temperature.cpp

#include "Temperature.h"

void initSensorTemperature() {
    TemperatureSensors.begin();
    TemperatureSensors.setResolution(TEMPERATURE_RESOLUTION);
}

void numberOfTemperatureSensor() {
    Serial.print(F("Searching devices... "));
    Serial.print(F("Found "));
    Serial.print(TemperatureSensors.getDeviceCount());
    Serial.println(F(" devices."));
}

void getTemperature() {
    TemperatureSensors.requestTemperatures();
    Serial.print(F("Temperature is "));
    Serial.print(TemperatureSensors.getTempCByIndex(0));
    Serial.print(F(" at "));
    Serial.print(TemperatureSensors.getResolution());
    Serial.println(F(" bits "));
}

Lcd.h

#ifndef Lcd_h
#define Lcd_h

#include <LiquidCrystal_I2C.h>

#define LCD_ADRESSE 0x27
#define LCD_COLUMN 16
#define LCD_LINE 2

LiquidCrystal_I2C lcd(LCD_ADRESSE, LCD_COLUMN, LCD_LINE);
// lcd.init();

void initLcd();

#endif

Lcd.cpp

#include "Lcd.h"

void initLcd(){
    lcd.init();
    lcd.backlight();
    lcd.home();
    lcd.printstr("INIT OK");
}

oneWire编译错误

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