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Crem2y/README.md

안녕하세요! 👋

  • 저는 크렘티(Crem2y)입니다.
  • FW 엔지니어이고, HW는 취미 레벨로 하는 정도입니다.

관심사 💡

  • MCU FW
  • HW (PCB artwork, schematics, etc.)
  • Linux

경험 ✈️

사용해본 것들

  • 언어
    • C, C++
    • Python
    • Lua
    • 등등..
  • MCU
    • ARM Cortex-M
      • RP2040, RP2350
      • STM32 (F0, F1, F4)
      • nRF52
    • Other Core
      • ATmega (AVR)
      • ESP32 (RISC-V)
  • 통신
    • RS-232, RS-485
    • BLE
    • Ethernet
  • HW 설계 툴
    • EasyEDA
    • Altium
    • PADS
  • 기타 툴
    • WireShark
    • Docker

TMI 💤

가장 좋아하는 코드

  • 고속 역 제곱근. 표준을 다른 방법으로 이용하는 느낌이라 좋아해요
float Q_rsqrt( float number )
{
	long i;
	float x2, y;
	const float threehalfs = 1.5F;

	x2 = number * 0.5F;
	y = number;
	i = * ( long * ) &y;                     // evil floating point bit level hacking
	i = 0x5f3759df - ( i >> 1 );             // what the fuck?
	y = * ( float * ) &i;
	y = y * ( threehalfs - ( x2 * y * y ) ); // 1st iteration
//	y = y * ( threehalfs - ( x2 * y * y ) ); // 2nd iteration, this can be removed

	return y;
}

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