Automotive STM32H7 Controller PCB – Multi-CAN FD, ESP32, Power Management and Test Firmware
Publicada el 2026-07-31
Descripción de la oferta
I am looking for an experienced automotive electronics engineer to design a production-ready controller PCB based on an STM32H7 microcontroller. This is a complete hardware design from scratch, including schematic design, PCB layout, component selection, automotive power protection and validation firmware. The controller will be used inside vehicles and must be designed for reliable operation in a harsh automotive electrical environment. It is not a hobby or basic development-board project. The enclosure and connector family are already selected. The final PCB must fit the provided Cinch automotive enclosure and connector arrangement. Main hardware requirements STM32H74x or suitable STM32H7 MCU Genuine dual-bank internal flash for safe A/B firmware updates Two native STM32 CAN FD buses One additional CAN FD bus controlled by the STM32 One CAN FD bus controlled independently by the ESP32 All four CAN buses must support CAN FD Fail-safe physical bridge between CAN1 and CAN2 CAN1 and CAN2 must remain connected when the MCU is disabled, resetting, updating or has failed Automotive CAN FD transceivers CAN1 wake-up from low-power mode Programmable CAN termination ESP32 WROOM module Wi-Fi access point Bluetooth Classic BLE Minimum 16 MB flash PSRAM preferred STM32-to-ESP32 communication over SPI, UART and status GPIO USB for STM32 firmware recovery and basic configuration ESP32 programming header 512 Mbit / 64 MB QSPI NOR flash for data logging SPI EEPROM for settings, serial number and calibration data Automotive 6-axis IMU Vehicle-voltage and MCU-temperature monitoring Inputs The board will include protected automotive inputs such as: 12 V ignition/wake input 12 V brake input Ground-switched handbrake input 0–5 V throttle input 0–5 V pressure or boost input Multipurpose analog input One or two multipurpose vehicle-speed inputs Hall, open-collector, VSS and suitable ABS-type sensor support Two spare 12 V-rated inputs Software-selectable pull-up and pull-down where practical Protected 5 V sensor supply and dedicated sensor ground Outputs At least six protected outputs are required, including: Protected 12 V high-side brake output Protected low-side park output Protected relay-coil output Multiple PWM-capable outputs Optional direct control of a 2–3 A automotive valve Safe hardware default states during reset, firmware update, brownout and MCU failure Power management The design must include: Reverse-polarity protection Automotive transient and load-dump protection Cold-crank and undervoltage handling Efficient 12 V to 5 V and 3.3 V conversion Protected USB and vehicle power-path handling Safe simultaneous USB and vehicle-power connection Delayed software shutdown Latched power-enable control Wake-up from 12 V ignition Optional wake-up from CAN1 Low-power sleep architecture Protected sensor supply eFuse or protected high-side power input preferred Primary use is a 12 V automotive system. Support for 24 V may be proposed only if it does not significantly increase cost or complexity. PCB requirements Altium Designer is mandatory Legal and reliable Altium installation required Multilayer PCB Controlled impedance for CAN FD Correct RF placement and antenna keepout for the ESP32 WROOM module Automotive EMC and grounding strategy Automotive or extended-temperature components AEC-Q parts preferred for exposed and critical circuits Components may be placed on both PCB sides Production test points where space permits Full mechanical verification against the enclosure and connector drawings Validation firmware is required The project must include working sample and test firmware. STM32CubeIDE firmware must demonstrate: CAN1, CAN2 and CAN3 communication CAN bridge control CAN wake-up Ignition wake-up Delayed shutdown Input sampling Speed-frequency measurement Output and PWM control EEPROM access QSPI flash logging IMU communication Supply-voltage and temperature monitoring SPI and UART communication with the ESP32 USB recovery procedure ESP32 firmware must demonstrate: Wi-Fi access point Web server WebSocket communication Bluetooth Classic BLE SPI and UART communication with STM32 CAN4 transmit and receive Basic diagnostic or log-data transfer ESP32 OTA update Deliverables Complete editable Altium project Schematic source and PDF PCB layout source Gerber or ODB++ production files Drill files Assembly drawings Pick-and-place files Complete BOM with exact manufacturer part numbers Approved alternative components Connector pinout Power budget CAN and power-management design documentation STM32 test firmware ESP32 test firmware Bring-up instructions Test procedure Completed hardware validation report Required experience Applicants must have real experience with: Automotive ECU or vehicle controller design STM32H7 hardware CAN FD Automotive power protection Low-power CAN wake-up systems ESP32 WROOM RF design Protected automotive inputs and outputs QSPI memory Mixed-signal PCB layout STM32CubeIDE firmware ESP32 firmware Altium Designer Generic Arduino, hobby PCB or simple ESP32-board experience is not sufficient. Project process The project will be completed in reviewable milestones: Architecture and component selection Complete schematic review Mechanical placement review PCB routing and manufacturing review Prototype bring-up Validation firmware and final handover A reviewable progress update is required at least once per week. Payment will only be released after each milestone has been reviewed and approved. Questions applicants must answer Please answer all of the following in your proposal: Provide examples of automotive ECUs or automotive communication controllers you personally designed. Which automotive power-input and transient-protection circuits have you implemented and tested? Which CAN FD transceivers and external CAN FD controllers have you used? How would you implement a normally connected, fail-safe CAN bridge between two CAN FD networks? Which STM32H74x device would you initially recommend and why? Which ESP32 WROOM module would you recommend for Wi-Fi, Bluetooth Classic, BLE, 16 MB flash and PSRAM? Describe your experience with CAN wake-up and software-controlled delayed shutdown. Describe your experience with STM32 dual-bank firmware updates and USB DFU recovery. Can you provide working STM32CubeIDE and ESP32 test firmware? Which Altium Designer version will you use? Will you personally complete all work? Provide a realistic milestone schedule. The complete engineering specification, enclosure files and connector information will be provided to shortlisted applicants. Suggested skills to select on Freelancer PCB Layout Altium Designer Electrical Engineering Electronics Embedded Systems STM32 ESP32 CAN Bus Firmware Automotive Engineering Microcontroller Circuit Design Recommended final line Please do not apply with a generic proposal. Start your application with “AUTOMOTIVE CAN FD” and answer the technical questions above.
Skills
Fuente original: freelancer