STM32 Firmware Development

I need reliable, production-ready firmware for a new STM32-based device. The work covers everything from bringing up the microcontroller and configuring UART, SPI, I²C, GPIO, and interrupt routines, through to integrating the code into a clean, maintainable project structure. If FreeRTOS will help keep timing predictable we can use it; if not, a lean bare-metal approach is fine—either way I expect tight, well-documented C/C++.

You will receive schematics, pin maps, and a high-level communication flow. In return I expect:

• Complete, buildable source code (Keil, STM32CubeIDE, or another GCC-based tool-chain—your choice, just state it up front)
• A flashed board that passes the agreed functional tests
• Clear documentation: compile-and-flash steps, peripheral configuration notes, and a brief design overview

Please attach links or code snippets from similar STM32 or embedded projects so I can gauge your style and depth. Start your proposal with “STM32” so I know you read everything.