uart数据传输-float类型转为char类型和char类型转为float类型_niuqq123的博客

uart数据传输-float类型转为char类型和char类型转为float类型

#include <iostream>
#include <vector>

using namespace std;

//由float类型转为char
void Float2Byte(vector<float> floatnum, unsigned char* byteArry)
{
	*byteArry = 0XAB;
	*(byteArry + 1) = 0XCD;

	for (int i = 0; i < sizeof(float); i++)
	{
		*(byteArry + 2 + i) = *((char*)&floatnum[0] + i);   //第一个float数据的首地址转为char类型的首地址
		*(byteArry + 6 + i) = *((char*)&floatnum[1] + i);   //第二个float数据的首地址转为char类型的首地址
		*(byteArry + 10 + i) = *((char*)&floatnum[2] + i);  //第三个float数据的首地址转为char类型的首地址
	}
	*(byteArry + 14) = 0XEF;
	*(byteArry + 15) = 0XCA;
}

//由char类型转为float
void Byte2Float(vector<float> &floatnum, unsigned char* byteArry)
{
	if((*byteArry == 0XAB) && (*(byteArry + 1) == 0XCD) && (*(byteArry + 14) == 0XEF) && (*(byteArry + 15) == 0XCA))
	{
		floatnum[0] = *(float*)(byteArry + 2);      //接收，反解出float数据类型
		floatnum[1] = *(float*)(byteArry + 6);
		floatnum[2] = *(float*)(byteArry + 10);
	}
}

//测试
int main()
{
	unsigned char* bArry = new unsigned char[16];    //定义长度为16char的指针。

	vector<float> num1 = {-12.51f, 10.12f, 45.01f};  //赋初值
	vector<float> num2 = {0,0,0};
	for (int i = 0; i < 10; i++)
	{
		Float2Byte(num1, bArry);                     //float类型转为char类型
		cout << "num1[0] = " << num1[0] << " " << "num1[1] = " << num1[1] << " " << "num1[2] = " << num1[2] << endl;

		Byte2Float(num2, bArry);                     //char类型转为float类型
		cout << "num2[0] = " << num2[0] << " " << "num2[1] = " << num2[1] << " " << "num2[2]= " << num2[2] << endl;
	}
	delete [] bArry;                                //释放内存
	return 0;
}