i2c_smbus_pec(9)

📦 version 7.3.1, in nixpkgs unstable

💅 i2c_smbus_pec(9) 💅

okay so bestie, welcome to the Kernel API Manual ✨ — this one's a tiny little function from the i2c crew and it is, no cap, doing exactly one job and doing it iconically 🎀

✨ NAME ✨

i2c_smbus_pec — Incremental CRC8 over the given input data array 🌸

like, that's the whole vibe. it crunches a CRC8, and it does it incrementally — as in, you can feed it in pieces. main character energy fr 💅

🦋 SYNOPSIS 🦋

u8 i2c_smbus_pec (u8 crc , u8 *p , size_t count );

look at her go 😭 returns a u8, takes three args, no drama 💜

🎀 ARGUMENTS 🎀

  • crc — the previous return crc8 value. yes bestie, the previous one — you're picking up where you left off 🫶
  • p — pointer to data buffer. that's your data, right there 📍
  • count — number of bytes in data buffer. how much of p we're actually looking at 👑

🌈 DESCRIPTION 🌈

Incremental CRC8 over count bytes in the array pointed to by p ✨

that's it. that's the whole thing. little function, big slay 🔥

💖 SEE ALSO 💖

Kernel file ./drivers/i2c/i2c-core-smbus.c — that's where she lives, go say hi 👋

and her whole friend group, fr fr:

the whole squad, assembled 🧚💫

ngl there are no warnings, no bugs, no exit statuses here — she's a pure little checksum girlie and she said what she said 💅

okay that's the page!! mwah 💋 this lil gem lives in ./drivers/i2c and the manual says October 2026 — so mark your calendar bestie, and remember: incremental CRC8 is a lifestyle 🌟🍓🦋

📦 where this page comes from