Arduino C：对`readArms（）'的未定义引用

While compiling some Arduino C file I get an error "undefined reference to `readArms()'"

在编译一些Arduino C文件时,我收到一个错误“未定义引用`readArms()'”

The code can be found on paste bin.

代码可以在粘贴箱中找到。

But basically what happens is:

但基本上会发生什么:

In the INO file I use:

在INO文件中我使用:

readArms();

Which is declared in "armfunctions.h" and "armfunctions.c"

哪个在“armfunctions.h”和“armfunctions.c”中声明

The .h file contains

.h文件包含

void readArms(void);

And the .c file :

和.c文件:

void readArms(void){
    float motor1 = 0.0;
    int motor = 0;
    motor = analogRead(READMOTOR1);
    motor1 = (float)motor;
    motor1 = (motor1 - 87.0) * (400.0/(1007.0-87.0));
    delay(1000);
}

2 个解决方案

#1

I have been researching this for hours today, making and testing various sketches, and have found (as you've already found) changing them to .cpp is a workaround, but if you want to specifically create a c file, you must wrap the prototypes in the header to get it to compile. There are a few good posts about it, but the crux of the issue, in your .h file put:

我今天已经研究了几个小时,制作和测试各种草图,并且发现(正如你已经发现的)将它们更改为.cpp是一种解决方法,但是如果你想专门创建一个ac文件,你必须包装原型在标题中让它编译。有一些关于它的好帖子,但问题的症结在你的.h文件中:

#ifdef __cplusplus
extern "C" {
#endif

void readArms(void);

#ifdef __cplusplus
}
#endif

#2

-2

You should use the following in your .C file:

您应该在.C文件中使用以下内容:

void armfunctions::readArms(void)... (the part in front of the :: is your classname in your .h file)

void armfunctions :: readArms(void)...(::前面的部分是.h文件中的类名)

#1

#ifdef __cplusplus
extern "C" {
#endif

void readArms(void);

#ifdef __cplusplus
}
#endif

#2

-2