OWON HDS200 Advanced Control Suite Comprehensive Project Description

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# Owon HDS2102S
Owon HDS2102S
OWON HDS200 Advanced Control Suite Comprehensive Project Description

1. Project Overview

This project is a custom-developed Python-based desktop control and
analysis suite designed for the OWON HDS200 Series handheld
oscilloscopes.

The software extends the functionality of the original device by
providing enhanced visualization, protocol decoding, waveform recording,
and modular architecture suitable for further research and development.

The system is built around a structured separation between: - Hardware
Communication Layer - Signal Processing Layer - Protocol Decoding
Layer - User Interface Layer

The goal of this project is to create a flexible, extensible, and
research-oriented control environment for measurement hardware.

2. Core Objectives

- Provide stable USB-based communication with the oscilloscope
- Enable real-time waveform acquisition
- Implement software-based signal analysis tools
- Provide protocol decoding (I2C and UART)
- Support waveform recording and export
- Maintain modular and maintainable architecture
- Allow future cross-platform expansion

3. System Architecture

Device (Oscilloscope Hardware) → USB Communication (HID / libusb) →
Driver Layer → Processing & Decoding Layer → UI Rendering Layer

Each layer is logically separated to allow maintainability and future
improvements.

4. Core Layer Responsibilities (/core)

driver.py: - USB device detection - HID communication handling - SCPI
command transmission - Binary waveform retrieval - Buffer management -
Data parsing and scaling

Recording System: disk_recorder.py disk_recorder_pro.py

Responsibilities: - Waveform data logging - Session recording - CSV
export functionality - Extended buffered recording in Pro mode

Protocol Decoders: i2c_decoder.py uart_decoder.py uart_decoder_pro.py

I2C Decoder: - Start/Stop condition detection - Clock extraction - Bit
timing reconstruction - Address and data decoding

UART Decoder: - Bit sampling - Framing detection - Baud rate timing -
Error handling

5. UI Layer (/ui)

The graphical interface is organized into functional tabs:

- Scope View
- Multimeter Mode
- FFT Analysis
- Function Generator Control
- I2C Protocol View
- UART Protocol View
- UART Advanced View
- Math Operations

Main window logic is handled by main_window.py.

The UI consumes processed data from the driver and decoding layers.

6. USB Communication Design

Communication is implemented using libusb and Python bindings.

Supported functionality: - Device enumeration - Endpoint configuration -
Command transmission - Binary waveform retrieval

The current implementation includes a Windows-specific USB backend
(libusb-1.0.dll). The architecture allows replacement with alternative
USB backends for cross-platform support.

7. Waveform Data Handling

Waveform acquisition includes: - Binary parsing - Scaling to
voltage/time domain - Trigger alignment - Memory depth handling -
Real-time visualization

8. Signal Processing Features

- FFT transformation
- Mathematical operations between channels
- Real-time scaling
- Measurement extraction
- Protocol reconstruction from sampled signals

9. Modularity and Expandability

The design allows: - Addition of new protocol decoders - Plugin-based
expansion - Alternative USB backends - Advanced recording engines -
Cross-platform GUI adaptation

10. Technical Strengths

- Modular architecture
- Hardware abstraction layer
- Software-based protocol decoding
- Integrated recording system
- Expandable structure

11. Known Limitations

- Currently Windows-focused (USB backend)
- No asynchronous USB communication yet
- Performance depends on USB throughput

12. Intended Use Cases

- Embedded systems debugging
- Protocol analysis
- Hardware research
- Educational laboratory tool
- Custom oscilloscope frontend

13. Development Status

The project is under active development.

Future improvements may include: - Asynchronous USB handling -
Performance optimization - Cross-platform USB abstraction - Plugin
architecture for decoders - Real-time streaming optimization

Author:

Independent engineering and research project developed to extend the
capabilities of OWON HDS200 Series oscilloscopes.

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