@ruthr

ISR_NAKED in Timer ISR

6d ago · 1 min read · ISR_NAKED tells the compiler, "Don't add your own register saving code" ISR(TIMER1_COMPA_vect, ISR_NAKED) This is critcal if you're using your own save/restore code because if the compiler adds its o

Prologue & Epilogue

6d ago · 1 min read · When you write a function, the compiler secretly inject setup code before your first line runs(prologue) and cleanup code before it returns (epilogue). You never see it, it lives in the generated asse

Macro in C

May 7 · 1 min read · What is a macro? A macro is a text replacement rule defined with #define that swaps names for text before the compiler runs. For Example: #define PI 3.14159 Every time you write "PI" in your code, th

SNMP & ICMP Protocols

Apr 24 · 3 min read · Today I learned some details about a couple of communication protocols while working on a system at work. SNMPSNMP stands for Simple Network Management Protocol. It runs over UDP (User Datagram Protoc

Installing Docker Engine in ARM64 Linux Debian

Sep 16, 2025 · 1 min read · Before getting started with Docker’s documentation, read the whole article. Follow the steps that are under “Install using the apt repository” In step one, when you get to the following code sample: echo \ "deb [arch=$(dpkg --print-architecture) sign...