Peripherals

RP2040Sharp emulates the RP2040 peripheral set with enough fidelity to boot real firmware. Most peripherals are accessed through RP2040Machine (e.g. machine.Uart0, machine.Sio, machine.Dma) and observed in tests via TestKit probes.

Coverage

Peripheral	Status	Notes
GPIO / SIO	✅	Per-pin API, spinlocks, interpolators, hardware divider
UART0 / UART1	✅	FIFO, baud config, DREQ for DMA
SPI0 / SPI1	✅	Master mode, FIFO, DREQ
I2C0 / I2C1	✅	Master + slave-mode simulation
ADC	✅	5 channels incl. temperature sensor, FIFO
PWM	✅	All 8 slices
PIO0 / PIO1	✅	4 state machines each, GPIO integration
DMA	✅	All channels, DREQ sources
Timer / Watchdog / RTC	✅	Alarms, microsecond counter
USB	✅	CDC-ACM host (MicroPython REPL)
Clocks / Resets	✅	Clock mux, per-peripheral reset
XOSC / ROSC / PLL / PSM / VREG	🟡	Register stubs (report stable/locked; no frequency model)
SSI flash (XIP hardware path)	⛔	Flash program/erase via C# hooks instead

Note

Per-peripheral reference pages are being filled in. For now, the API surface is documented via XML-doc comments in the source; see Reference.