Embedded Software Design

Three Software Layers, One Coherent Device

Medical device software spans three distinct disciplines: the interface the clinician touches, the communication that ties the system together, and the motor control that does the physical work. Zlinemed’s software design service covers all three — the same firmware stack that runs our ZL-HSDRILL controller and simulation pump systems.

HMI Design (Human-Machine Interface)

The HMI layer handles user interface and interaction: screen layout, buttons and sliders, status indicators, feedback, and error alerts. Development uses tools such as Qt, touchscreen drivers, and graphics libraries — producing interfaces that stay readable and responsive in clinical conditions, with customizable UI for OEM branding.

Communication Design

The communication layer handles data exchange between devices, covering protocols including UART, CAN, RS485, EtherCAT, and Modbus. Engineering focus falls on the three properties medical systems cannot compromise: data integrity, real-time performance, and error handling. This is the layer that lets a handpiece, a controller, a foot pedal, and a robotic host behave as one system.

Motor Control Design

The motor control layer handles motor algorithms and control logic: field-oriented control (sensorless and sensored), speed, position, and torque control, high-frequency injection, and PWM generation. Implementation covers closed-loop control, filtering, and protection — the logic that keeps a 120,000 RPM surgical drill stable and controlled.

Software Built With the Hardware

Firmware developed in isolation fights its own hardware. At Zlinemed, software design runs alongside circuit design, so drivers, protections, and control loops are written and tested against the real board from day one. For complete device programs, see medical device development.