UART tutorials & labs.

The most complete UART curriculum on the internet — starting from asynchronous-communication first principles (clock mismatch, drift, recovery) before touching the start bit, then through framing, baud-rate generation, the oversampling and majority-vote mechanics that make UART work, RTL receiver and transmitter design, FIFOs and flow control, SoC integration (APB / AXI / interrupts / DMA), verification, waveform-driven debugging, real-industry case studies, and interview mastery.