Arduino草图,多定义错误
Posted
技术标签:
【中文标题】Arduino草图,多定义错误【英文标题】:Arduino sketch, multiple definition error 【发布时间】:2015-06-27 22:29:31 【问题描述】:我正在尝试将我创建的以前工作的草图分解成一个类和草图,但我遇到了一些麻烦。我正在扩展为我正在开发的板设计的键盘类的功能,但编译器一直抱怨函数的多个定义。
这是我的草图、我的 .h 和我的 .cpp:
草图
#include <DigiKeyboard.h>
#include "MacroKeyboard.h"
//constants
#define LED 1
#define SWITCH 0
//configuration
#define PAUSE_ON_ENTER true
const char command[] PROGMEM = "test string";
MacroKeyboard kb(command, SWITCH);
void setup()
//tie switch to high
pinMode(SWITCH, OUTPUT);
digitalWrite(SWITCH, HIGH);
// set pins to correct uh whatever
pinMode(LED, OUTPUT);
pinMode(SWITCH, INPUT);
void loop()
DigiKeyboard.update();
kb.update();
.h:
#ifndef MacroKeyboard_h
#define MacroKeyboard_h
#include "Arduino.h"
#define ON LOW
#define OFF HIGH
#define SCANCODE_DIFF 8
class MacroKeyboard
const char* command;
int pin;
bool isPressed = false;
public:
MacroKeyboard(const char*, int);
void parseLetter(int);
void update();
;
#endif
.cpp:
#include <DigiKeyboard.h>
#include "MacroKeyboard.h"
MacroKeyboard::MacroKeyboard(const char* macro_position, int pin_number)
command = macro_position;
pin = pin_number;
void MacroKeyboard::parseLetter(int letter)
unsigned int scancode = pgm_read_byte_near(ascii_to_scan_code_table + letter - SCANCODE_DIFF);
unsigned int keycode = scancode & ((1 << 7) - 1); // masking off shift bit
unsigned int mods = 0;
unsigned int shift = (scancode & (1 << 7)) >> 7;
mods |= (shift == 1) ? MOD_SHIFT_LEFT : 0;
DigiKeyboard.sendKeyStroke(keycode, mods);
void MacroKeyboard::update()
if(digitalRead(pin) == ON && !isPressed)
isPressed = true;
for (int i = 0; i < strlen(command); i++)
char letter = pgm_read_byte_near(command + i);
parseLetter(letter);
if (digitalRead(pin) == OFF && isPressed)
isPressed = false; // debounce
我遇到的错误是这样的:
MacroKeyboard\MacroKeyboard.cpp.o: In function `usbFunctionSetup':
C:\Program Files (x86)\Digistump_Arduino\hardware\digistump\avr\libraries\DigisparkKeyboard/DigiKeyboard.h:216: multiple definition of `usbFunctionSetup'
MacroKeyboardTest.cpp.o:C:\Program Files (x86)\Digistump_Arduino\hardware\digistump\avr\libraries\DigisparkKeyboard/DigiKeyboard.h:216: first defined here
MacroKeyboard\MacroKeyboard.cpp.o: In function `MacroKeyboard::MacroKeyboard(char const*, int)':
C:\Program Files (x86)\Digistump_Arduino\hardware\digistump\avr\libraries\DigisparkKeyboard/DigiKeyboard.h:170: multiple definition of `DigiKeyboard'
MacroKeyboardTest.cpp.o:C:\Program Files (x86)\Digistump_Arduino\hardware\digistump\avr\libraries\DigisparkKeyboard/DigiKeyboard.h:199: first defined here
MacroKeyboard\MacroKeyboard.cpp.o:(.progmem.data.usbDescriptorHidReport+0x0): multiple definition of `usbDescriptorHidReport'
MacroKeyboardTest.cpp.o:(.progmem.data.usbDescriptorHidReport+0x0): first defined here
collect2: error: ld returned 1 exit status
Error compiling.
我做错了什么?
【问题讨论】:
看起来有些源文件被复制了,因此被编译了两次,例如C:\Users\Dday\Documents\Arduino\libraries\MacroKeyboard/MacroKeyboard.cpp
和C:\Users\Dday\AppData\Local\Temp\build538426719655717639.tmp/MacroKeyboard.cpp
啊哎呀,当我试图将它粘贴到我的库文件夹中时,这是多个包含内容。修复后,我仍然遇到 DigiKeyboard 库的问题:/ 上面编辑的帖子出现了新错误
您必须添加所有相关代码:我在您发布的代码中没有看到usbFunctionSetup
、DigiKeyboard
或usbDescriptorHidReport
的定义。
抱歉,这些文件位于我拥有的 arduino 构建中包含的 Digikeyboard 库中。 github链接在这里:github.com/digistump/DigisparkArduinoIntegration/blob/master/…
【参考方案1】:
您使用的库以一种奇怪的方式编写。在文件DigiKeyboard.h
中有这样的定义(cmets mine):
// Declares a global variable.
// If you include this file in more than one cpp file it will cause linker error.
DigiKeyboardDevice DigiKeyboard = DigiKeyboardDevice();
// Defines a non-inline function
// Again, multiple definitions error if the file is included in several source files.
uchar usbFunctionSetup(uchar data[8])
// code
因此,您必须将此 .h 文件仅包含在一个 .cpp 文件中来使用它。
【讨论】:
啊,有道理。感谢您的所有帮助!以上是关于Arduino草图,多定义错误的主要内容,如果未能解决你的问题,请参考以下文章