v1.5.0 - first public release

• Calibration is no longer needed. Autocalibration is enabled in TLE5012. Requires 1.5 rotation for calibration. For perfect results - you can do Z axis move in the beginning of the print. Instead of calibration there is now "Reset" which resets settings to default.
• TLE5012 now utilizes full 15-bit resolution vs 14-bit before. FIR filter further improves results.
• EN signal is processed in interrupt. Dramatically lower latency.
• DIR signal latency is reduced - less code in interrupt processing. Still around 2µs latency is expected (note that hardware steppers has around 0.2µs latency). But should be good enough.
• No more floating point math in control loop. Perfect fixed point math everywhere.
• Main control loop is optimized and now runs at 30kHz vs 10kHz originally. 35-40kHz also fits, but I prefer to have some margin.
• OLED display is >10x faster.
• DIP pins are ignored. They are a mess. Please use OLED menu or serial port for configuration.
• Magnetic Viewer added which shows how strong is magnetic field. You should be between 40% and 80% field strength maximum.
• No limit on error magnitude to be corrected. You can force it 5 rotations away from target - and it will return back (original version gave up after ~40° error).
• Auto-restart if multiple skipped steps detected.
• Only PI values are used. D is currently ignored.
• Current is fixed, will no longer reduce automatically. If you want to run cooler - feel free to reduce current below manufacturer recomendation. 50% current works just fine.
• Display always shows encoder reading - useful for debugging.
• Screensaver will switch off display after 1 minute of inactivity (en=0 or no steps)