Microcontroller SPI Control Board and Application Design
Budget: £750 – £1,500 GBP
I have a concept for a small control board that will act purely as a communication interface; the brain must be a microcontroller and every line on the board will ultimately speak SPI. I need the complete journey covered—from schematic capture through to a working prototype—and a simple companion application that can configure, send, and read data over that SPI bus.
Hardware
I want you to select an appropriate MCU, lay out the PCB, generate the BOM, and produce production-ready Gerbers. The board will only need the essentials: power regulation, the MCU, an SPI header, and whatever discretes are required for reliable signalling. Options such as UART or I²C might be added in a later revision, so leave enough pins and routing headroom for that future expansion.
Firmware
The firmware should expose a clean, well-documented SPI register map. I would like interrupt-driven code, written in C or C++, and delivered with full source plus a make/project file that I can rebuild in the vendor’s IDE.
Application
Alongside the board I need a lightweight application (desktop or cross-platform web is fine) that can talk to the board through an external SPI bridge or ESP32. Its role is to flash new firmware, change configuration settings and display a live log of traffic for debugging.
Deliverables
• Complete schematic and PCB layout files
• BOM with part numbers and sourcing info
• Gerber/NC drill set ready for fabrication
• Compiled firmware and full source code
• Companion application executable and source
• Brief test report showing SPI communication working on the bench
Acceptance will be based on the board reliably echoing test packets over SPI at the agreed clock rate and the application cleanly reading/writing every register. Let me know your preferred toolchain and any questions you have so we can lock down the spec quickly.
Hardware
I want you to select an appropriate MCU, lay out the PCB, generate the BOM, and produce production-ready Gerbers. The board will only need the essentials: power regulation, the MCU, an SPI header, and whatever discretes are required for reliable signalling. Options such as UART or I²C might be added in a later revision, so leave enough pins and routing headroom for that future expansion.
Firmware
The firmware should expose a clean, well-documented SPI register map. I would like interrupt-driven code, written in C or C++, and delivered with full source plus a make/project file that I can rebuild in the vendor’s IDE.
Application
Alongside the board I need a lightweight application (desktop or cross-platform web is fine) that can talk to the board through an external SPI bridge or ESP32. Its role is to flash new firmware, change configuration settings and display a live log of traffic for debugging.
Deliverables
• Complete schematic and PCB layout files
• BOM with part numbers and sourcing info
• Gerber/NC drill set ready for fabrication
• Compiled firmware and full source code
• Companion application executable and source
• Brief test report showing SPI communication working on the bench
Acceptance will be based on the board reliably echoing test packets over SPI at the agreed clock rate and the application cleanly reading/writing every register. Let me know your preferred toolchain and any questions you have so we can lock down the spec quickly.