DIY Board Firmware for Communication

@hayteekeys

Hi, I can bring up your DIY embedded board from bare metal and deliver a production‑ready firmware image focused on robust, well‑tested communications, with clean structure and a clear HAL so it’s portable if the MCU changes. APPROACH - Bare‑metal bring‑up: Clock/reset, GPIO, interrupts, and peripheral init from your schematics + bench traces (no vendor SDK required). - Comms stack: Implement UART, SPI, I²C plus one higher‑level link (CAN / USB‑CDC / TCP/IP via external PHY—your choice). - Non‑blocking architecture: Interrupt‑driven drivers with ring buffers/queues, timeouts, and error recovery; HAL separation + unit-style tests where possible. - Verification interface: Simple CLI or register map for quick validation over terminal, plus a scripted acceptance test. DELIVERABLES - Fully commented source + reproducible build (Makefile/CMake) + compiled binary/hex - Pin‑level init sheet + README (Toolchain, flashing, how to test each protocol) - Python test script demonstrating packet exchange + status echo (acceptance test) QUALITY / WORKFLOW - Zero warnings, clean commit history (no dump commits), and fast boot/bring‑up validation. TO START - MCU type (or best guess), clock source, and programming method (SWD/JTAG/USB bootloader) - Schematics + pin map + any known register addresses for peripherals - Which “higher‑level” protocol you want first (CAN / USB‑CDC) Preferred toolchain: GCC + Make/CMake (PlatformIO also possible if it fits your flashing method).

@elect2eng

I guess you have not specified the processor you are using. So cant give any suggestion of the IDE and HAL. Let us discuss the details of the project with some data to start. I am comfortable with PIC, stm32, esp32 etc..

@cesur135

As a freelancer with extensive experience in industrial automation, I am confident that I am well-positioned to take on your DIY board firmware project. While I typically work with programs such as TIA Portal and Simatic Manager, I am well-versed in using different toolchains and would adapt to align with your preference. My technical proficiency extends to writing clean, production-ready firmware in modern C or C++ as well as my ability to provide a fully commented source, reproducible build, and compiled binary/hex, all of which you require for your project. I understand the unique challenges involved when there are no vendor SDK or reference codes available. Relying on schematics and oscilloscope traces is not foreign to me. I have implemented complex control strategies from scratch and conducted thorough point-to-point tests during system commissioning. Your requirement for interrupt-driven, non-blocking code in C/C++ is exactly the type of programming approach I'm accustomed to, even in bare-metal environments without prior codebase.

@abdf2010

Hello there, I reviewed your project DIY Board Firmware for Communication and understood the requirements at a high level. I focus on delivering clear, stable, and maintainable solutions aligned with the actual scope, I can work with C Programming, Python, Electronics and follow a clean development process with proper structure and error handling. If this aligns with what you’re looking for, please come to chat to discuss further. Best regards

@dushyant317

Hello, I’ve carefully reviewed your project requirements and clearly understand the tasks involved. I have 13 years of experience and strong expertise in the exact skills this project requires. I have successfully delivered similar projects before and can share relevant samples if needed. I will complete this within your expected timeline while maintaining quality and clear communication. I look forward to working with you and contributing sincerely to your project’s success.

@baskarrajendran

Hi, yes — this is absolutely feasible, and I’m comfortable doing full bare-metal firmware bring-up on custom hardware without relying on vendor SDKs. I have strong experience in embedded C/C++ development, low-level peripheral drivers, and protocol stack implementation, including UART, SPI, I²C, CAN, USB CDC, and TCP/IP (lwIP). I regularly work with interrupt-driven, non-blocking architectures and clean HAL separation so firmware remains portable across MCUs. How I’ll approach your board: • Bare-metal bring-up using schematic + signal probing • Clock, GPIO, and pin-mux initialization • Robust interrupt-driven drivers for UART, SPI, I²C • Higher-level protocol integration (CAN / USB CDC / TCP/IP as best fit) • Clean HAL layer for easy MCU portability • Lightweight CLI / register interface for validation Deliverables: • Fully commented firmware source + reproducible Makefile/CMake build • Flash-ready binary/hex • Pin initialization sheet + concise README • Python-based test tool demonstrating packet exchange & board status Quality focus: • Warning-free builds • Structured commits • Deterministic startup behavior • Sub-3-second automated communication validation I’m comfortable debugging from schematics, logic analyzer captures, and scope traces, and can start immediately. Happy to align on MCU family, preferred toolchain, and communication protocol before kickoff. Looking forward to collaborating on this.

@AzharPlus

Hi, - Expert in firmware development. (20+ years of experience, Top-Ranked, BE Electronics) - Recently developed non blocking drivers code in C/C++ for several VFDs for a UK client. Code contains 3 layers of code (top-bottom = Vfd-Specific Command Layer, Modbus-Layer, Serial/RS485 Communication layer) (Samples available) - Expertise in communication protocols. UART, USB CDC (Atmel and PIC based MCU but can implement on others), CAN, SPI, I2C, One-Wire, JTAG, IrDA and countless more. - Implementation of non blocking terminal code with complete available commands help print and multipage menus. Useful to test embedded hardware and can dump Registers, Memory, EEPROM values and edit them also. (Samples available) - Fully commented, formatted source code with Doxygen-style comments for VS Code hover-help support. (Samples available). - Pin configuration list, and all type of procedure help will be provided as professional documents with table of contents for large documents. (Samples available) - Can develop companion apps/scripts in Python, C#, Flutter, Electron, or Tauri for PC and mobile environments. (Samples available for each). - Delivered code will contain zero errors/warnings and meet all acceptance criteria. - Proficient in git-based workflows (GitHub, Bitbucket, GitLab, etc.). I am confident you will be impressed once we discuss the project, and I look forward to a long-term relationship. Best Regards, Azhar Chohan

@manith2001

Hey — saw your post about the bare-metal firmware for your custom board. Starting from scratch without vendor SDKs is where things get interesting. Quick questions before I suggest an approach: What MCU are you using? (STM32, nRF, ESP32, something more exotic?) Do you have schematics and pinouts ready, or are we reverse-engineering from the board? What's your preferred higher-level protocol? (CAN, USB CDC, TCP/IP?) — happy to recommend based on your use case Any existing toolchain/debugger setup? (OpenOCD, J-Link, etc.) I've done bare-metal embedded work before — built BLE audio transmission firmware in C with I2S interrupts, optimized storage with RLE compression (saved ~30KB flash), and built production firmware that shipped in devices used by 10+ companies. My approach: HAL-based architecture (clean separation for future porting) Interrupt-driven, non-blocking UART/SPI/I²C Simple CLI over UART for testing/verification Python test script for packet exchange validation Clean commit history with logical steps (init → peripherals → protocols → testing) Toolchain preference: GCC ARM (arm-none-eabi) + CMake for builds OpenOCD or J-Link for flashing/debugging Logic analyzer for protocol verification I'm comfortable working from schematics and scope traces — actually prefer it since there's no vendor bloat to work around. Can you share the schematic and MCU datasheet? I'll review and tell you what's realistic for bring-up timeline and any potential gotchas.

@jodi7blencowe

Thanks for posting. It looks like a very interesting project. I'm an experienced developer mainly python but also familiar with the every C language's entire library and have done communication protocols before and am more than happy to build this for you. I'm new to this website and freelancing but far from new to the tech field and look forward to working with you. Hope to hear from you soon.