Placeholder

2026-07-31

This post exists to prove the content model. Its front matter is only title and date — no draft, no type, no layout, no weight. It landed in a realm index simply by being a markdown file inside content/hardware/.

Delete it whenever you like.

A fenced code block, so syntax highlighting is visible:

#include <stdint.h>

static volatile uint32_t *const GPIO = (uint32_t *)0x40020000;

void toggle(uint8_t pin) {
    GPIO[0] ^= (1u << pin);
}

Long lines inside code blocks scroll horizontally rather than wrapping, which is the only reason the rule exists:

0x40020000  4b 1e 00 00  ldr r3, [pc, #120]  ; a deliberately overlong line to demonstrate horizontal overflow behaviour