Abstract : In order to improve the dynamic performance and control accuracy of the stepper motor control system, this paper proposes a stepper motor control system design method based on FPGA (Field Programmable Gate Array) and digital signal processor TMS32OF2808, including the design of system hardware, software and acceleration and deceleration control algorithm. By looking up the table to control the current of two windings of the stepper motor, high-precision stepper motor microstepping control is realized, which improves the running accuracy of the stepper motor and eliminates the low-speed oscillation phenomenon. Through experimental testing, the results verify the correctness and effectiveness of the stepper motor acceleration and deceleration control algorithm. Keywords : stepper motor; digital signal processor (DSP); acceleration and deceleration control; microstepping; field programmable gate array (FPGA) 0. Introduction Stepper motors are widely used in mechatronics equipment such as CNC devices, robotic arms, commercial machines and automated instruments due to their advantages of large dynamic torque, high positioning accuracy and high resolution. Stepper motors must be driven by a special driver, and different driving methods have a great influence on the performance of stepper motors [1]. Stepper motor driving methods have evolved through several stages: single-voltage driving, high-low voltage driving, chopper constant current driving, frequency-modulated and voltage-modulated driving, and microstepping driving. The first few methods are relatively mature and reliable after years of research and application, but they haven't solved the inherent problem of large low-frequency oscillations in stepper motors, and are limited to operation at step angles or half-steps; higher precision can only be achieved through improvements to the motor structure. In contrast, while microstepping drive systems are more complex and costly, they can drive the motor to operate with precision of a fraction of the step angle, or even higher. Microstepping improves the operating accuracy of stepper motors and also enhances their low-frequency characteristics. (Full text available for download: Research on Two-Phase Stepper Motor Control System Based on FPGA and DSP)