Lecheeel

Hi, I'm Lecheeel. I work on embedded systems and software, with a focus on FPGA-based control, ultrasonic phased arrays, and Android internals.

On the embedded side, I'm exploring FPGA-based multichannel phase synthesis, synchronized waveform generation, and acoustic field modeling for three-dimensional manipulation. My interests also include microcontroller firmware, multichannel driver circuits, and high-speed PCB layout, particularly differential pair routing, impedance control, and signal integrity.

On the software side, I'm studying Android internals through AOSP, framework services, Binder IPC, and HAL interfaces. Related interests include GNSS data processing, NMEA parsing, and Android's Generic Kernel Image (GKI), with attention to kernel modules, KMI compatibility, and how requests cross application, framework, and hardware boundaries.

I share selected projects and technical notes here, covering their design, implementation, and experimental results.