avr_signature(3avr)

💖 NAME 💖

avr_signature — <avr/signature.h>: Signature Support, aka the little header that tucks your chip's ID into your ELF file so everybody knows who's who 🫶

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✨ SYNOPSIS ✨

📖 Detailed Description

🌸 Introduction

okay bestie, so the <avr/signature.h> header file is literally here to let you automatically and easily include the device's signature data in a special section of the final linked ELF file. no cap, it just does it for you 💅

and then that value can be used by programming software to compare the on-device signature with the signature recorded in the ELF file, looking for a match before programming the device. it's giving "vibe check the chip first" 🔥

🦋 API Usage Example

the usage is very simple, like literally so simple — just include the header file:

#include <avr/signature.h>

and that's it, that's the whole thing ✨ this will declare a constant unsigned char array, and it is initialized with the three signature bytes, MSB first, that are defined in the device I/O header file. this array is then placed in the .signature section in the resulting linked ELF file. iconic placement behavior 👑

so the three signature bytes that are used to initialize the array are these defined macros in the device I/O header file, from MSB to LSB:

• SIGNATURE_2
• SIGNATURE_1
• SIGNATURE_0

⚠️ heads up bestie: this header file should only be included once in an application. once. uno. don't be out here including it twice 🙈

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👑 AUTHOR 👑

Generated automatically by Doxygen for AVR-LibC from the source code. (not a human girlboss, a robot one 🤖💜)

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and that's the whole page, mwah 💖 this was AVR-LibC, Version 2.2.1, and the page itself is avr_signature(3avr) — thanks for reading, ily, go #include responsibly 🎀🦋