3.5inch-turing-smart-screen
Release Notes - Turing 3.5 Neon Monitor V38
[Unreleased] - Ready for First Public Release
🎉 What’s New in V38?
Fixed COM Hang Issues - Major improvements to serial communication stability:
- Removed blocking FlushFileBuffers call
- Previous version blocked indefinitely when CTS signal was inactive
- Now uses controlled timeouts with proper error handling
- Added CTS diagnostics before each write operation
- Checks if device is ready to receive data
- Skips operations when CTS not asserted to prevent hangs
- Disabled RTS/CTS handshake
- RTS_CONTROL_HANDSHAKE was causing deadlocks on some CH340 devices
- Now uses simple fBinary and fOutxCtsFlow for read readiness detection
- Added buffer error checking
- ClearCommError() checks before each write operation
- Detects buffer full/empty conditions and timeouts
- Improved reconnect logic
- Purge buffers on reconnect attempts
- Recheck CTS state after recovery
- Better handling of temporary communication failures
- Reduced chunk size for better reliability
- Changed from 2048 bytes to 1024 bytes per write
- Faster confirmation on slow serial ports
- Better overall stability on USB connections
📊 Statistics
- Total lines of code: ~1100 lines (main.go)
- Fixes implemented: 6 major improvements
- Backward compatibility: Fully compatible with V37 functionality
🎯 Key Improvements
| Metric | V37 | V38 | Improvement |
|---|---|---|---|
| FlushFileBuffers blocking | Yes | No | ✅ Fixed |
| CTS diagnostics | No | Yes | ✅ Added |
| RTS/CTS handshake | Enabled | Disabled | ✅ Fixed |
| Buffer error checking | No | Yes | ✅ Added |
| Reconnect handling | Basic | Advanced | ✅ Improved |
| Chunk size reliability | 2048 bytes | 1024 bytes | ✅ Better |
🔄 Changes from V37
Removed:
- Blocking
FlushFileBufferscall after data writes - RTS_CONTROL_HANDSHAKE in serial port configuration
Added:
checkCTS()function for signal readiness checkingclearCommError()function for buffer state monitoring- Improved error messages with detailed diagnostics
- Watchdog timeout mechanism (3 seconds)
Changed:
- Reduced chunk size from 2048 to 1024 bytes
- Enhanced reconnect logic with buffer purge
- Better log messages for debugging
📝 Migration Notes
No action required! V38 maintains full backward compatibility:
- ✅ Same API and functionality as V37
- ✅ All existing features preserved
- ✅ Automatic detection of COM port
- ✅ Console session management unchanged
- ✅ OpenCode AI integration maintained
Simply update to new version or recompile with main_v38.go.
🚀 Getting Started
Quick Start (Ready-to-use EXE):
cd C:\35inchENG\v2\Turing35NeonV38
.\Turing35NeonStableV38_temp.exe --test
From Source:
cd C:\35inchENG\v2\3.5inch-turing-smart-screen-main
go build -ldflags="-s -w" -o Turing35NeonStableV38.exe main_v38.go
📋 Build Instructions
Prerequisites:
- Go 1.23 or later
- Windows SDK (included with Go on Windows)
Build Command:
go build -ldflags="-s -w" -o Turing35NeonStableV38.exe main_v38.go
Run Tests:
Turing35NeonStableV38.exe --test
🔍 Testing Recommendations
- Test Mode First: Always start with
--testflag for 30-minute stability check - Monitor Logs: Watch
app_v37.logfor any CTS warnings or errors - Gradual Transition: Start simple metrics, then enable neon animation
📞 Support
If you encounter issues:
- Check application logs (
app_v37.log) - Verify USB connection and driver status
- Try different USB port/cable if needed
- Update CH340 driver to latest version
See Troubleshooting Guide for detailed help.
Version History
V37 - Initial Release
- First public release
- Basic COM port communication
- Known issues with long-running sessions
V38 - Fixed COM Hang Issues (Current)
- Comprehensive fixes for serial communication stability
- All known issues from V37 addressed
- Ready for production use
Acknowledgments
Special thanks to:
- CH340 driver developers
- Windows COM port API documentation contributors
- OpenCode AI team for Go API support
License
MIT License - See LICENSE file
Thank you for using Turing 3.5 Neon Monitor V38!
