XMC-for-Arduino 4.0.0

This is a major release with significant changes including migration to the new Arduino Core API, board naming convention updates, and the removal of legacy boards.

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⚠️ Breaking Changes

Arduino Core API Migration

• Migrated to the new Arduino Core API: The entire core has been refactored to use the official ArduinoCore-API. This brings better compatibility across different Arduino cores and with modern Arduino libraries but may require code adjustments for existing projects.

Board and Vendor Naming Convention Changes

• Index file renamed from package_infineon_index.json to package_xmc_index.json, please update the URL in the Arduino preferences, instructions here.
• Vendor name changed from Infineon to infineon (lowercase) in package and platform files to be consistent with naming conventions across our Arduino cores and to avoid issues with Windows-based systems (case insensitivity).
• Board names have been standardized to follow the official kit naming convention:
  • XMC1100_Boot_Kit → KIT_XMC11_BOOT_001
  • XMC1100_XMC2GO → KIT_XMC_2GO_XMC1100_V1
  • XMC1300_Boot_Kit → KIT_XMC13_BOOT_001
  • XMC1400_Kit_for_Arduino → KIT_XMC1400_ARDUINO
  • XMC1400_XMC2GO → KIT_XMC14_2GO
  • XMC4700_Relax_Kit → KIT_XMC47_RELAX
• Old board variant macros are preserved for backwards compatibility via build.board_variant_old in boards.txt.

Wire/I2C Library Changes

• The Wire library has been completely refactored to inherit from HardwareI2C.
• Ring buffer implementation added for I2C communication.
• Error handling has been improved with proper return codes.

SPI Library Changes

• SPI library refactored with updated transfer function logic.
• Changes to SPI pin configurations across all variants.

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🗑️ Removed Boards

The following boards have been removed from V4.0.0 and are only supported up to V3.x:

Board	Product Link
KIT_XMC_PLT2GO_XMC4200	Product Page
KIT_XMC_PLT2GO_XMC4400	Product Page

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✨ Added Features

Core Functions

• setAnalogWriteFrequency() function: New function to configure PWM frequency dynamically.
• random() implementation: Added proper random number generation implementation.
• pulseIn() improvements: Updated pulse measurement implementation using millis().
• shiftIn()/shiftOut() implementation: Added shift register functions.
• sbrk() function declaration: Added for proper memory allocation support.

Debugging

• Cortex Debugger Integration: Added support for Cortex debugging with automatic launch.json generation.
• Generic gen_launch.sh script: Tool to configure build ELF and JSON paths for debugging.

Tone Function

• Reworked Tone implementation with proper CCU timer handling.
• Support for multiple tone pins (configurable via NUM_TONE_PINS).
• Frequency range: 1 Hz to 500 Hz (software-derived from Systick).

Testing Infrastructure

• Added comprehensive Hardware-in-the-Loop (HIL) test integration.
• Arduino Core Tests added as submodule for standardized testing.
• Unity test framework integration for all boards.

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🗑️ Removed Features

• OneWire library removed from built-in libraries: Now available as external submodule.
• XMC1100 H-Bridge 2GO support removed from documentation.

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🐛 Bugfixes

• I2C scan bug fixed: Corrected issue in Wire library affecting device scanning.
• Digital I/O fixes: Removed invalid pin condition checks, added flag for current pin status.
• Tone function noTone() fix: Corrected the noTone function implementation.
• Platform.txt typo fix: Fixed critical typo/bug in platform configuration.
• XMC1400 Arduino pinout fixes: Updated pin configurations for correct operation.
• Higher frequency PWM fix for XMC1400: Resolved issue with PWM at higher frequencies.
• Interrupt handler fixes: Corrected interrupt code for invalid pin/mode handling.
• Fixed incompatibility with arm_math.h: Modified analog macros to avoid naming conflict.

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🔧 Improvements

Documentation

• Added installation reference documentation.
• Updated Arduino deviations documentation with Tone frequency details.
• Added known issues documentation for XMC1300 Boot Kit.
• Improved documentation for analog macros and built-in libraries.

Flasher Tool

• Updated xmc-flasher.py with improved firmware flag handling.
• Added custom flag to disable J-Link auto-update.
• Better logging and error messages.

DevOps & CI/CD

• Migrated to reusable GitHub workflows.
• Added compile checks for all library examples.
• Pre-commit hooks enabled for code quality.
• Added CODEOWNERS file for better code review management.

Pin Configurations

• Updated XMC1400 Arduino pinout diagram.
• Improved pin configurations for all supported boards.
• Added CCU8V3 macro support for XMC1400 variants.

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📦 Supported Boards in V4.0.0

Board Name	Description
KIT_XMC11_BOOT_001	XMC1100 Boot Kit
KIT_XMC_2GO_XMC1100_V1	XMC1100 2Go Kit
KIT_XMC13_BOOT_001	XMC1300 Boot Kit
KIT_XMC1400_ARDUINO	XMC1400 Kit for Arduino
KIT_XMC14_2GO	XMC1400 2Go Kit
KIT_XMC47_RELAX	XMC4700 Relax Kit

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Contributors

• @jaenrig-ifx
• @LinjingZhang
• @dineshgit411
• @wxyyy0117
• @ederjc

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Full Changelog: V3.5.2...4.0.0

XMC-for-Arduino 3.5.5

📦 Uncategorized

• docs/: Add installation reference.
  • PR: #374
• Remove poll msg
  • PR: #385

XMC-for-Arduino 3.5.4

📦 Uncategorized

• cores: Fix Serial.
  • PR: #377

XMC-for-Arduino 3.5.3

What's Changed

• changed Makefile.test, updated submodule for arduino-core-tests by @Frederikwag in #336
• ./gitignore: Fix noise command. by @LinjingZhang in #342
• 3.x/release compile wflow update by @jaenrig-ifx in #344
• New release flow update by @jaenrig-ifx in #349
• Bugfix/fix broken links by @ederjc in #362
• Devops/add link check by @ederjc in #363
• README.md: Add temporary survey link. by @ederjc in #369
• Add poll in build by @jaenrig-ifx in #370
• libraries/CAN/README.md: Revoved deprecated link. by @jaenrig-ifx in #371

New Contributors

• @Frederikwag made their first contribution in #336

Full Changelog: V3.5.2...3.5.3

XMC-for-Arduino V3.5.2

What's Changed

• Add code convention.md by @LinjingZhang in #329
• Add environment setup to development instructions by @LinjingZhang in #330
• OneWire fixes by @OlafFilies in #339
• variants/XMC1400: Add SPI pin definitions. by @ederjc in #341

Full Changelog: V3.5.1...V3.5.2

XMC-for-Arduino V3.5.1

What's Changed

Bugfixes

• SPI: Refactor SD card functionality and change default pins on XMC4700 Relax Kit in #325 by @LinjingZhang

Repository Configuration

• Added pre-commit formatter hook & commit formatting workflow by @LinjingZhang

Quality Assurance

• Update compile check workflow in #324 by @LinjingZhang

Details

Full Changelog: V3.5.0...V3.5.1

XMC-for-Arduino V3.6.0-beta

This is a pre-release, use V3.5.1 for the latest stable version.

Changes:

• Refactor Serial implementation to use XMC hardware buffer.

XMC-for-Arduino V3.5.0

What's Changed

Bugfixes

• Serial: Add handling of edge case that might lead to Serial getting stuck in spinlock wait by @MaxMax-embedded in #307.
• Wire: Fix I2C ACK message timout condition to avoid freezing by @Frederik-Wagner in #321.

Repository Configuration

• Added .gitattributes to ensure proper handling of line endings by .
• Restructured and extend .gitignore.
• Added pre-commit workflow & configuration by @LinjingZhang in #311.

libraries/CAN

• Added configuration for clang-format, clang-tidy and cppcheck.
• Added & applied configuration for clang-format & clang-tidy.
• Added misra to enable static code analysis.
• Fixed definition for CAN message object.

Community

• Added Code of Conduct by @jaenrig-ifx in #312.
• Extended Contribution Guidelines.

Quality Assurance

• Added GitHub Action workflows for Hardware-in-the-loop testing. @OlafFilies
• Included arduino-core-tests submodule for generic unit tests.
• Enable tests for CAN, Wire and Serial.

Details

Full Changelog: V3.4.1...V3.5.0

XMC-for-Arduino V3.4.1

What's Changed

• Fix: Cannot find JLink device in Linux by @LinjingZhang in #305

Full Changelog: V3.4.0...V3.4.1

XMC-for-Arduino V3.4.0

What's Changed

• Migrate documentation from Wiki to Read The Docs by @ederjc in #304

Full Changelog: V3.3.0...V3.4.0