- fixed SPIKE frame detection
- removed STDIO over USB support for easier updates (no BOOTSEL required)
- added Arduino framework support
- switched to platformio based builds
- simplified clock count programs
- blink while auto-detecting system using a 500ms interval
- cleaned up buffer handling
- use second core exclusively for SPI
- added alphaDMD support for SAM and SPIKE
IMPORTANT:
- use dmdreader-ppucdmd.zip for PPUC/DMD
- use dmdreader-alphadmd.zip for alphaDMD
- dmdreader-ppucdmd2.zip is an experimental build for PPUC/DMD 2, which has not been released yet