CANFDTEST(1)

👑 CANFDTEST(1) — like, the manual page but make it cute

okay bestie, gather round 💖 you've somehow found yourself staring at the manual for canfdtest, which lives in section 1 of the manual (you know, the "user commands" girly section ✨). It's part of that canfdtest 2023.03-1build1 era, and honestly? she's iconic. Let's get into it 🎀

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✨ NAME ✨

canfdtest — no cap, this is literally the manual page for canfdtest 2023.03-1build1 🦋

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🌸 SYNOPSIS 🌸

canfdtest [options] <can-interface>

like, you give her options and a can-interface and she does her thing. simple as that, periodt 💅

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💫 DESCRIPTION 💫

canfdtest — a Full-duplex test program (DUT and host part). yes ma'am, she talks AND listens at the same time, full duplex, main character energy only 🫶 🔥

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🎀 OPTIONS 🎀

• -b — enable CAN FD Bit Rate Switch ✨ (the switching of the bit rate, enabled, for CAN FD, girlies only)
• -d — use CAN FD frames instead of classic CAN 🌈 like, upgrade your whole vibe from classic to FD
• -e — use 29-bit extended frame format instead of classic 11-bit one 💅 extended format, 29 bits, not the classic 11-bit situation
• -f COUNT — number of frames in flight (default: 50) 🦋 so she's juggling 50 of them by default, keep up
• -g — generate messages ⭐ she's making them herself, she's an independent woman
• -i ID — CAN ID to use for frames to DUT (ping), default 77 📞 sending a little ping to the DUT, cutie
• -l COUNT — test loop count 🔁 how many times we go around, bestie
• -o ID — CAN ID to use for frames to host (pong), default 78 🏓 and here's the pong back to the host, matched set fr fr
• -s SIZE — frame payload size in bytes 📦 the actual size of the payload, in bytes, exactly
• -v — low verbosity 😌 she talks, but like, softly
• -vv — high verbosity 😭 she will NOT stop talking and honestly we love that for her
• -x — ignore other frames on bus 🙈 not your business, not your problem, look away

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With the option -g CAN messages are generated and checked on <can-interface>, otherwise all messages received on the <can-interface> are sent back incrementing the CAN id and all data bytes. 💖 The program can be aborted with Ctrl+C — yes bestie, ^C is your escape hatch, use it whenever you need to dip ✌️

ngl that ^C thing is the only way to get out of this loop, so remember it 🫶

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🌟 EXAMPLES 🌟

on DUT:

canfdtest -v can0

on Host:

canfdtest -g -v can2

see how the DUT just vibes with -v and the Host is the one generating with -g? that's the whole dynamic, iykyk 💜

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and that's the tea, babe 🍓 this was canfdtest 2023.03-1build1, served fresh from December 2025, and she ate, no crumbs. slay 💅👑✨