Wokwi now offers a web-based simulator for developing and debugging embedded Rust programs. This online tool allows users to write, build, and run Rust code targeted for various microcontrollers, including the AVR ATmega328P (like the Arduino Uno) and RP2040 (Raspberry Pi Pico), directly in the browser. The simulator features peripherals like LEDs, buttons, serial output, and an integrated logic analyzer, enabling interactive hardware simulation without requiring physical hardware. Code can be compiled and flashed to the virtual microcontroller, and the simulator provides a debugging environment for stepping through code and inspecting variables. This simplifies the embedded Rust development process, making it more accessible for learning and experimentation.
A developer created a web-based simulator that recreates the experience of using a telegraph. The simulator allows users to input a message, which is then converted into Morse code and visually transmitted as flashing lights and audible clicks, mimicking the original technology. It also features a receiver that decodes the transmitted Morse code back into text. This project provides a hands-on way to understand and interact with the historical process of telegraphic communication.
Hacker News users generally praised the Telegraph simulator for its simplicity, clean design, and accurate recreation of the Telegraph experience. Several commenters appreciated the nostalgia it evoked, recalling childhood memories of playing with similar toys. Some suggested improvements, such as adding sound or the ability to send messages between two simulated devices. A few users discussed the historical significance of the Telegraph and its role in communication technology. One commenter even shared a personal anecdote about their grandfather's career as a telegraph operator. The overall sentiment was positive, with many finding the project a charming and educational homage to a bygone era of communication.
The Therac-25 simulator recreates the software and hardware interface of the infamous radiation therapy machine, allowing users to experience the sequence of events that led to fatal overdoses. It emulates the PDP-11's operation, including data entry, mode switching, and the machine's response, demonstrating how specific combinations of user input and software flaws could bypass safety checks and activate the high-power electron beam without the necessary x-ray attenuating target. By interacting with the simulator, users can gain a concrete understanding of the race conditions, inadequate software testing, and poor error handling that contributed to the tragic accidents.
HN users discuss the Therac-25 simulator and the broader implications of software in safety-critical systems. Several express how chilling and impactful the simulator is, driving home the real-world consequences of software bugs. Some commenters delve into the technical details of the race condition and flawed design choices that led to the accidents. Others lament the lack of proper software engineering practices at the time and the continuing relevance of these lessons today. The simulator itself is praised as a valuable educational tool for demonstrating the importance of rigorous software development and testing, particularly in life-or-death scenarios. A few users share their own experiences with similar systems and emphasize the need for robust error handling and fail-safes.
Summary of Comments ( 7 )
https://news.ycombinator.com/item?id=43305973
HN commenters generally expressed enthusiasm for Wokwi's online embedded Rust simulator. Several praised its ease of use and accessibility, noting it lowers the barrier to entry for embedded development. Some highlighted the educational benefits, particularly for those new to Rust or embedded systems. A few pointed out the limitations of simulation compared to real hardware, but acknowledged the simulator's value for initial development and testing. The discussion also touched on potential improvements, including support for more microcontrollers and peripherals, as well as integration with other tools. Some users shared their positive experiences using Wokwi for specific projects, further reinforcing its practical usefulness.
The Hacker News post titled "Online Embedded Rust Simulator" (linking to https://wokwi.com/rust) generated a modest amount of discussion, with several commenters expressing enthusiasm for the project and exploring its potential applications and limitations.
One commenter highlighted the educational value of the simulator, suggesting it could be a fantastic tool for beginners learning embedded Rust. They praised the interactive nature of the platform, allowing users to experiment and gain practical experience without needing physical hardware. This sentiment was echoed by another user who envisioned using the simulator in workshops or introductory courses.
Several commenters delved into technical aspects, discussing the underlying technology and its limitations. One user inquired about the simulator's handling of peripherals, specifically mentioning the absence of support for specific features like DMA. The creator of Wokwi responded, acknowledging the current limitations and outlining plans for future development, including potential support for DMA and other advanced peripherals. This exchange showcased the collaborative nature of the platform and the developer's responsiveness to community feedback.
Another technical discussion revolved around the simulator's performance and its suitability for larger, more complex projects. One user questioned whether the simulator could handle real-world applications with significant processing demands. While acknowledging that the simulator might not be ideal for highly complex projects, the creator pointed out that it was designed for educational purposes and smaller-scale projects, emphasizing its strength in rapid prototyping and experimentation.
Beyond technical discussions, several commenters expressed their general appreciation for the project, viewing it as a valuable contribution to the embedded Rust ecosystem. Some users shared their personal experiences with the simulator, highlighting its ease of use and effectiveness in learning embedded concepts.
Overall, the comments reflected a positive reception to the online embedded Rust simulator. The discussion centered around the simulator's educational benefits, technical capabilities and limitations, and its potential as a valuable tool for learning and experimentation within the embedded Rust community.