FPGA Multi-Axis Control Board

High-Precision Multi-Axis Motion Control Solution

Project Overview

Multi-axis motion control board based on FPGA+STM32 architecture, supporting 12-channel PWM outputs for motor driving, 12-bit ADC inputs for feedback detection, and 56 GPIOs for expansion interfaces. Supports precise control of servo motors and stepper motors, equipped with 400-line encoder feedback system, suitable for industrial automation, robotics, and other high-precision motion control scenarios.

Technical Challenges

Multi-axis synchronous motion control requires high-precision timing control and real-time response capabilities, while handling multiple PWM outputs, ADC sampling, and GPIO control simultaneously, imposing extremely high requirements on hardware performance and software algorithms.

Solution

Adopts FPGA+STM32 dual-core architecture with FPGA handling high-precision PWM generation and real-time feedback processing, while STM32 manages system control and user interface. Optimized algorithms ensure precision and stability of multi-axis synchronous control.

Key Highlights

FPGA+STM32 dual-core architecture leveraging respective processing advantages

12-channel PWM output supporting multi-axis motor synchronous driving

12-bit ADC input achieving high-precision feedback detection

56 programmable GPIO interfaces supporting multiple expansion functions

Compatible with servo motors and stepper motors for wide application range

400-line encoder feedback with positioning accuracy up to 0.09 degrees

Real-time response capability meeting high-speed control requirements

Technology Stack

Core Hardware: FPGA programmable logic, STM32 microcontroller

Motor Control: PWM generation, motor drivers, motion control algorithms

Feedback Systems: ADC sampling, encoder readers, position feedback

Interface Technology: GPIO expansion, communication interfaces, sensor interfaces

FPGA Development: Verilog/VHDL hardware description languages

Embedded Systems: FreeRTOS real-time operating system

Control Algorithms: PID control, trajectory planning, synchronous control

Industrial Communication: CAN bus, Modbus, Ethernet

Development Timeline

Month 1: Solution design and hardware selection

Month 2: FPGA logic design and PCB layout

Month 3: Hardware fabrication and FPGA program development

Month 4: System integration and performance testing