- New CSX1255Controller: I/Q DSP over ALSA + SPI frequency/mode control,
libgpiod hardware reset and optional PA PTT output (GPIO17).
- Config: new [SX1255] section with RX/TX frequency, reset and PTT options.
- Deploy: Raspberry Pi Zero 2 W config, systemd unit and install script.
- Docs: SX1255 integration notes and Zero 2 W install guide.
Author: Karel Kadlec (OK1LBC) <xkk@post.cz>
Karel Kadlec