Embedded Firmware: UART Protocol Implementation

Our product runs on a custom embedded system and it now needs a dedicated firmware module that can handle all UART-based communication. I already have the hardware schematic and register map; what is missing is production-ready code that initializes the peripherals, manages interrupts, frames the data, and exposes a clean API the application layer can call. Here is what I need from you: • Develop clean, well-documented firmware in C or C++ that brings up the MCU, configures the UART peripheral, and implements reliable transmit/receive routines (including error handling and buffering). • Follow our existing coding conventions and keep the footprint small so power consumption stays within spec; DMA or low-power sleep modes are welcome where appropriate. • Provide a concise README and inline comments so my internal team can extend or maintain the code easily. • Supply a test project (Keil, STM32CubeIDE, or makefile-based—your choice) that exercises all UART functions on the target board. Acceptance criteria 1. Code compiles with no warnings on the target toolchain. 2. Loop-back and external device tests confirm loss-free data transfer at 9600–115200 bps. 3. All source files, project files, and build instructions are delivered in a single repository or archive. If you have recent experience writing embedded firmware focused on communication protocols—especially UART—this should be a straightforward engagement. I’m ready to start as soon as I confirm you understand the scope and can commit to a quick turnaround.

Project ID: 40446283