Arduino 將浮點數轉換為十六進制 IEEE754 單精度 32 位 (Arduino convert float to hex IEEE754 Single precision 32-bit)

問題描述

Arduino 將浮點數轉換為十六進制 IEEE754 單精度 32 位 (Arduino convert float to hex IEEE754 Single precision 32‑bit)

我想在Arduino的以下站點中將浮點值轉換為IEEE754單精度32位十六進制值。https://www.binaryconvert.com/result_float.html?decimal=051046049048

float f = 3.10;
byte hex[4] = {0};

byte FloatToHex(float f){
   .......
}

如何創建這樣的函數？格式不一樣也沒關係。

參考解法

方法 1:

f is already stored in binary. reinterpret_cast is generally a code smell issue, but its valid use is to view the byte representation of variables.

void FloatToHex(float f, byte* hex){
  byte* f_byte = reinterpret_cast<byte*>(&f);
  memcpy(hex, f_byte, 4);
}

void setup() {
  float f = 3.10;
  byte hex[4] = {0};

  FloatToHex(f, hex);
  //... do stuff with hex now...
}

void loop() {

}

(by WooJae You、JohnFilleau)

參考文件

1. Arduino convert float to hex IEEE754 Single precision 32‑bit (CC BY‑SA 2.5/3.0/4.0)