Printf

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printf is a tiny, fast, and fully loaded printf implementation for embedded systems. It is non-dependent and includes an extensive test suite, supporting sprintf and (v)snprintf.

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Free tier

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API

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Skill level

Technical

About

What is printf?

printf is a highly optimized and compact implementation of the standard printf function, specifically engineered for resource-constrained embedded systems. Its design prioritizes speed and efficiency, making it suitable for environments where memory and processing power are limited. The tool operates without external dependencies and comes with a comprehensive test suite to ensure reliability and correctness. It fully supports common printf functionalities, including sprintf and (v)snprintf implementations, providing essential formatting capabilities for embedded development.

Best used for

Implementing efficient and reliable string formatting in resource-constrained embedded systems.

Common actions

Implement printf

Optimize code size

Manage embedded resources

Format strings

Develop embedded software

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Capabilities

Key features

Tiny implementation
Fast execution
Embedded systems focus
Non-dependent
Extensive test suite

Target Audience

Embedded systems developersFirmware engineersHardware engineers

Integrations

Not yet documented

Pricing & Plans

unknown

Free

FAQs

What are the typical memory footprints for this printf implementation compared to standard library versions?

This printf implementation is designed for extreme compactness, often resulting in significantly smaller code and data footprints (e.g., <1KB for basic functionality) compared to full standard library printf implementations, which can be tens of kilobytes.

Does this printf support floating-point formatting (e.g., %f, %g) or only integer types?

To maintain its tiny footprint and speed, floating-point support is typically optional or excluded by default. Users often need to explicitly enable it or use custom implementations if floating-point formatting is required, as it adds significant code size.

Can this printf be easily integrated into bare-metal embedded projects without an operating system?

Yes, its non-dependent nature is a core feature. It's specifically engineered for bare-metal environments and embedded systems without an OS, requiring only a simple output character function to be provided by the user.

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