转换结构来字节和回结构体 [英] Converting struct to byte and back to struct

问题描述

我目前与 Arduino的乌诺 s工作，9DOFs和的的XBee s，而我试图创建一个可以通过串口发送一个结构，逐字节，然后重新构建成一个结构。

到目前为止，我有以下的code：

 结构AMG_ANGLES {
    浮动偏航;
    浮间距;
    浮动辊;
};诠释主（）{
    AMG_ANGLES struct_data;    struct_data.yaw = 87.96;
    struct_data.pitch = -114.58;
    struct_data.roll = 100.50;    字符*数据=新的char [sizeof的（struct_data）];    为（unsigned int类型I = 0; I＆LT;的sizeof（struct_data）;我++）{
        // COUT＆LT;＆LT; （字符*）（＆放大器; struct_data + I）＆所述;＆下; ENDL;
        数据[I] =（字符*）（安培; struct_data + I）; //存放结构的字节数组。
    }    AMG_ANGLES * TMP =（AMG_ANGLES *）的数据; //重新进行结构
    COUT＆LT;＆LT; tmp.yaw; //显示偏航，看它是否是正确的。
}
 

来源： HTTP：//$c$cpad.org/xMgxGY9Q

这code似乎没有工作，我不知道我做错了。

我该如何解决这个问题？

解决方案

看来我已经解决了我的问题有以下code。

 结构AMG_ANGLES {
    浮动偏航;
    浮间距;
    浮动辊;
};诠释主（）{
    AMG_ANGLES struct_data;    struct_data.yaw = 87.96;
    struct_data.pitch = -114.58;
    struct_data.roll = 100.50;    //发送端
    焦B〔的sizeof（struct_data）];
    的memcpy（B，＆安培; struct_data，sizeof的（struct_data））;    //接收端
    AMG_ANGLES TMP; //重新进行结构
    的memcpy（安培; TMP，B的sizeof（TMP））;
    COUT＆LT;＆LT; tmp.yaw; //显示偏航，看它是否是正确的
}
 

警告：如果发送和使用相同的端架构收到此code只会工作

I'm currently working with Arduino Unos, 9DOFs, and XBees, and I was trying to create a struct that could be sent over serial, byte by byte, and then re-constructed into a struct.

So far I have the following code:

struct AMG_ANGLES {
    float yaw;
    float pitch;
    float roll;
};

int main() {
    AMG_ANGLES struct_data;

    struct_data.yaw = 87.96;
    struct_data.pitch = -114.58;
    struct_data.roll = 100.50;

    char* data = new char[sizeof(struct_data)];

    for(unsigned int i = 0; i<sizeof(struct_data); i++){
        // cout << (char*)(&struct_data+i) << endl;
        data[i] = (char*)(&struct_data+i); //Store the bytes of the struct to an array.
    }

    AMG_ANGLES* tmp = (AMG_ANGLES*)data; //Re-make the struct
    cout << tmp.yaw; //Display the yaw to see if it's correct.
}

Source: http://codepad.org/xMgxGY9Q

This code doesn't seem to work, and I'm not sure what I'm doing wrong.

How do I solve this?

解决方案

It seems I've solved my issue with the following code.

struct AMG_ANGLES {
    float yaw;
    float pitch;
    float roll;
};

int main() {
    AMG_ANGLES struct_data;

    struct_data.yaw = 87.96;
    struct_data.pitch = -114.58;
    struct_data.roll = 100.50;

    //Sending Side
    char b[sizeof(struct_data)];
    memcpy(b, &struct_data, sizeof(struct_data));

    //Receiving Side
    AMG_ANGLES tmp; //Re-make the struct
    memcpy(&tmp, b, sizeof(tmp));
    cout << tmp.yaw; //Display the yaw to see if it's correct
}

WARNING: This code will only work if sending and receiving are using the same endian architecture.

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