A byte on the wire.

Explore UART framing and a simple SPI clock/data transfer.

LIVE MODEL / CHANGE SOMETHINGAll experiments ↗

ProtocolByte (0–255)Step

UART: idle high, low start, eight LSB-first data bits, high stop. SPI mode 0 here is MSB first, idle-low clock, sampling on the rising edge. Logical levels only, not voltages or timing guarantees.

Keep exploring.

01 / MEMORY

Follow the pointer.

Step through addresses and values.

02 / DATA STRUCTURES

A buffer that comes back around.

Push and pop without shuffling the array.

03 / C FUNDAMENTALS

Where the padding goes.

Reorder fields and compare the layout.

04 / INTERFACES

Watch a byte travel.

UART framing and an SPI transfer.