PCB

• New PCB revision by @svire-at and @integratedjoy in #88

Library Features

• ADC: Fixed MPU config by @fanfare-ff in #77
• ADC: Implemented circular DMA mode by @fanfare-ff in #86

Library Examples

• Audio recording fix by @fanfare-ff in #86
• FinishedADC_1CH_DMA_Circular example by @fanfare-ff in #86
• Replaced comms script in each example by @svire-at in #87

Projects

• Wired FSK comms by @Ferni41359 in #82
• Wireless FSK communication by @Ferni41359 in #85
• FSK Stability Revamp by @fanfare-ff and @Ferni41359 in #91
• Replaced comms script in each project by @svire-at in #87

Full Changelog

0.7.0...0.8.0

PCB

• Reorganized KiCad project by @svire-at in #46
• Polished schematics and generated a new PDF by @svire-at and @integratedjoy in #67

Library Features

• ADC: Rewritten LL driver; fixed software polling in both modes; new config structure by @fanfare-ff in #73
• ADC: DMA buffer macro with auto-sizing and MPU-safe alignment by @fanfare-ff in 9dbc549
• ADC: Support for independent timers for each ADC by @LorenzoBuldorini in #26
• Timers: New nanosecond-precision delays with a minimum of 550ns by @fanfare-ff in a3fd71e
• Timers: Standardized frequency calculations by @fanfare-ff in a3fd71e

Library Examples

• New Record_Audio example with MEMS voice-line recordings by @svire-at in #47
• New ADC_3CH_DMA_Flags example showcasing the DMA flag by @fanfare-ff in #73
• New ADCx3_Different_SR example with independent timers for each ADC by @LorenzoBuldorini in #26
• Renamed and refactored all ADC examples by @fanfare-ff in #73
• Refactored DAC_2CH example by @svire-at in #73
• Foundation for Basic_UltraSound receiver in Python by @integratedjoy in #36
• Expanded Basic_UltraSound receiver in Python by @LorenzoBuldorini in #71
• Added Basic_UltraSound_4CH receiver in Python by @LorenzoBuldorini in #71

Projects

• Restructured ultrasonic ranging by @svire-at and @fanfare-ff
• Optimized distance calculations for ultrasonic ranging by @fanfare-ff in 36dcab2
• Weather station foundation by @svire-at in #49
• MATLAB receiver script with partial data chunks support by @svire-at in #69
• Simple TX-RX comms as FSK foundation by @Ferni41359 in #56
• Ultrasonic ranging WiFi GUI draft by @thodob in #25
• WiFi GUI project put on hold by @fanfare-ff in #59

Documentation

• Projects: Rewritten the main projects page by @svire-at in #72
• Projects: Expanded ultrasonic ranging documentation by @svire-at in #48
• Library: Restructured ADC docs; updated all examples and functions by @fanfare-ff in #73
• Library: Nanosecond delays and software overhead compensation by @fanfare-ff in a3fd71e
• Library: Separate timers for ADCs by @LorenzoBuldorini in #57
• Library: Added 12-bit DAC note by @svire-at in #66
• Library: Expanded DAC frequency calculations documentation by @svire-at in #73
• Website: Switched to Cloudflare Pages by @fanfare-ff
• Website: Custom domain for the website: sensedu-shield.com by @fanfare-ff
• Website: Moved website actions to a separate repository SensEdu-Website by @fanfare-ff
• Website: Fixed lowercase/uppercase conflicts in website internal links by @fanfare-ff in #45
• README: Added PR and issue templates by @fanfare-ff
• README: Added contributing and code styling guidelines by @fanfare-ff

New Contributors

• @LorenzoBuldorini made his first contribution in #26
• @integratedjoy made his first contribution in #36
• @Ferni41359 made his first contribution in #56

Full Changelog

0.6.1...0.7.0

Library Features:

• New example: "Basic_UltraSound_WiFi" - same as "Basic_UltraSound", but with WiFi as data transmission medium (#22, #24)
• New peripheral: PWM (aa282cc)
• PWM: supports single frequency in a range 1Hz - 60MHz
• PWM: x4 possible outputs with different duty cycles
• PWM: new example "Generate_PWM" - continuous PWM on 4 outputs with different duty cycles
• PWM: new example "Generate_PWM_Freq_Sweep" - sequence of PWM with gradually increasing frequencies on one output pin

Distance Ranging Project:

• Renamed "Distance Measurements" to "Distance Ranging"
• Included refactored sketch with full processing debug data transmission under "/extra/ultrasonic_distance_acq_detailed_dataset/"

Documentation:

• README: Updated project list
• Getting Started: Jumper connections
• Library/Others: Example breakdown for "Basic_UltraSound_WiFi" (#22)
• Library/PWM: Added the page for new peripheral: errors, functions description, examples, developer notes with theory of operation and configuration details (aa282cc)
• Projects: Listed more applications
• EMG BioInputs: Amplification Circuit; Data Acquisition
• Ultrasonic Ranging WiFi GUI: GUI sketch

Full Changelog

0.6.0...0.6.1

General:

• New Projects: EMG BioInputs and Weather Station
• New Library: XENSIV Pressure Sensor Arduino library for DPS310 (#18)
• Added Acknowledgments Section to README (#18)

Library Features:

• Fixed extern "C" placement (#15)
• Fixed ADC buffer size calculation bug (0952656)

Distance Measurements Project:

• Introduced new XL version of the SensEdu Shield for enhanced measurements with 9 microphones and greater spacing
• Major script updates, leading to the first successful 3D measurements
• File Structure Updates:
  • Distance acquisition scripts for standard and XL versions are now available under ~\projects\UltraSound\ as ultrasonic_distance_acq and ultrasonic_distance_acq_xl respectively
  • Previously used full detailed data visualization scripts have been moved to ~\projects\UltraSound\extra
• Improved plotting clarity
• Outlier rejection as an additional post-processing step

Chirp Generation Project:

• Chirp Sketch Optimizations: Maximum LUT size expanded from 7,800 samples to 80,000 samples (#18)
• Sawtooth modulated chirp now ensures an integer number of cycles, resolving signal discontinuities (#18)

FMCW Radar Project:

• FMCW distance measurement now operates with a single SensEdu Shield, instead of requiring two (#19)

EMG BioInputs Project:

• Added multi-channel EMG signal acquisition sketch
• Designed MiniJack2Jumper PCB for integration with SparkFun 12970 Electrodes
• Introduced EMG FIR filtering in MATLAB
• Implemented button pressing logic with flexible thresholds (requires further improvements)
• Added dataset recording and offline analysis scripts in MATLAB for efficient algorithm tests

Weather Station Project:

• Implemented basic weather status estimation (#18)
• Corrected DPS310 library for Arduino GIGA R1 compatibility (#19)
• Initializing and reading the SHT35 humidity sensor (#20)
• Designed a custom board for the SHT35 humidity sensor (#20)
• Defined TODOs for future project developments (#20)

Documentation:

• FMCW Project: Code implementation guidelines (#16); Fix for videos not displaying properly (#17); Figures corrections (#19); Other final improvements (#19)
• EMG BioInputs: Biological Background; Electrode Connectivity

Full Changelog:

0.5.0...0.6.0

General:

• Added KiCad files for PCB (#9)
• SensEdu library is searchable in Arduino IDE Library Manager
• Fixed callouts color problems for dark theme in documenation (#5)

Library Features:

• DAC CH2 support (#1)
• ADC3 support (#2)
• ADC CPU poll bugfix (still problematic for one shot mode #8)
• New example "Basic_UltraSound_4CH" to display raw ultrasonic reflections for all channels at the same time
• Updated ADC sampling rate calculations (59db659)

Distance Measurements Project:

• Updated to a new DAC syntax
• Added real measurement data acquisition program
• Added program for checking the ADC sampling rate
• Optimized "comparison" DAC wave for XCORR algorithm
• Project files restructured in separate folder ~\projects\UltraSound\

Chirp Generation Project:

• Generate chirp signals with user settings (start/end frequency, chirp time)
• In 2 different modulations available: sawtooth & triangular (#7)

FMCW Radar Project:

• Perform FMCW radar distance measurement using x2 SensEdu boards (#13)
• Real time ADCs spectrum analysis in MATLAB
• Provided MATLAB script to simulate FMCW distance measurement and play with radar parameters (#14)

Documentation:

• Getting Started: Finished setup guidelines
• PCB: Overview; layout; power supply, sensors, amplifiers, transmitters; design choices; connections & pinouts (#9)
• Library: Overview; error handling; structs, functions, examples, and pitfall descriptions for each peripheral: timers, ADCs and DAC
  • Cache Coherence
  • Conversion Time and ARR/PSC calculations
  • Clock Configuration
  • "Other Examples" page with complete step-by-step basic ultrasonic example
• Projects: Overview with potential SensEdu usage case examples
• Ultrasonic Distances Project: How to change ADC sampling rate; added diagrams and formulas
• Chirp Project: Introduction; step-by-step chirp generating function explanation; example arduino code (#12)
• FMCW Project: Introduction; FMCW radar principle; radar design
• Help: Solving problems; contact us; FAQs
• Contributing: Overview of contributing ideas; roadmap
  • Documentation Contributions: Adding new pages; syntax; wiki hosting guide
  • Library Contributions: Naming conventions; namespaces
  • Projects Contributions: Submitting own projects

Full Changelog:

0.4.1...0.5.0

Library Features:

• Fix: cache coherence problems for DAC addressing #4
• New example for DAC run-time variable LUT:
  libraries\SensEdu\examples\Send_DAC_Variable_Wave\

Documentation:

• Search bar for quick navigation
• Mathjax support

Full Changelog:

0.4.0...0.4.1

Library Features:

• GitHub Pages hosted documentation
• Docs hosting guide in README
• ADC2 support
• Multichannel mode for ADC2
• DMA functions are transferred inside ADC and DAC to make usage simpler

Included Projects:

• Ultrasound measurements rewritten with SensEdu lib
• Incorporated all 4 microphones for the newest shield revision
• Filtering around 32kHz fixed
• Project restructure for increased readability

Full Changelog:

0.3.0...0.4.0

The first SensEdu release.
Introduces stable basic functionality for microphones and speaker.

Library Features:

• ADC1: Operates in single and multichannel modes.
• DAC CH1: Supports sine wave generation in single, burst, and continuous modes.
• Timer Triggering: fixed sampling rates for ADC1 and DAC CH1.
• DMA: efficient data transfer for both ADC1 and DAC CH1.

Included Projects:

• Basic ultrasound distance measurements for a single microphone.
• MATLAB script for visualizing measurement data.
• Advanced ultrasound measurements with filtering and cross-correlation for distance evaluation (in progress).

Full Changelog:

https://github.com/ShiegeChan/Edusense/commits/0.3.0