2025 One Hertz Challenge: STM32 Manages Sub-50 Byte Code for Frequent Blinking
In a remarkable display of coding efficiency, a compact binary program named has been developed to achieve a binary size under 50 bytes and a blink frequency close to 1 Hz. This program, created by Rudra Lad, serves as a valuable resource for finding and sharing similar compact binary programs.
The optimization of the Blink code for a microcontroller, as demonstrated by , involves several key strategies.
Minimizing Code Size
To reduce the overall size of the binary, it is recommended to avoid using the standard startup code and write the program directly in the . Additionally, using Bit-Banding for direct access to specific bits in peripherals and optimizing delay loops can significantly decrease the code size while maintaining the desired frequency.
Eliminating RAM Usage
Avoiding the use of RAM for variables or data storage by using registers directly reduces the size of the program and eliminates the need for RAM initialization.
Precision Timing
Verifying the actual blink frequency using a logic analyzer is crucial to ensure it is close to 1 Hz. Adjusting delay constants in the code can help achieve the desired frequency.
Here is a simplified example of how one might structure such a program for an STM32 microcontroller. Note that this example is highly simplified and actual implementation will depend on the specific microcontroller and toolchain used.
```c
void Reset_Handler(void) { // Initialize the clock and configure any necessary peripherals here
} ```
Iterating and Refining
Adjusting the delay loop and using tools like a logic analyzer to verify the frequency and adjust the code accordingly are essential steps in achieving the closest possible frequency to 1 Hz.
Rudra Lad's code is available on GitHub for further reference. The GitHub repository for the program can be a platform for sharing similar compact binary programs. Users who have developed their own compact binary programs are encouraged to share them, contributing to the growth and development of this project.
The delay_blinky_13 program, designed for the STM32F4 Discovery microcontroller development board, demonstrates the potential for efficient coding and serves as an inspiration for those looking to improve their coding skills.
Technology plays a crucial role in the optimization of Blink, a compact binary program. The use of strategies such as minimizing code size, eliminating RAM usage, and precision timing allows for efficient and compact coding. This results in achieving a binary size under 50 bytes and a blink frequency close to 1 Hz, as seen in the delay_blinky_13 program. Sharing such compact binary programs on platforms like GitHub fosters the growth and development of technology in the field.
