Add PIO support for RP2040 and RP2350 - #3449

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begeistert wants to merge 61 commits into

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begeistert:feat/rp2040-pio-hardware

Commits on Jul 24, 2026

Add nanoFramework.Hardware.Rp2040 PIO native assembly
begeistert
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Bump-allocate PIO instruction memory, relocate JMP
begeistert
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Add pio_gpio_init and set_consecutive_pindirs interop
begeistert
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Wire the PIO native interop into RP_PICO2_RP2350
begeistert
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Bring the PIO block out of reset before configuring it
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RP2040 PIO: FifoJoin/GpioBase, real SM/program allocation, FIFO ops, IRQ events, Pico W
begeistert
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Fix PIO interop: SM-index bounds, ISR critical section, Pico W vector clash, FIFO timeout
begeistert
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RP2040 PIO: RP2350 IRQ, Pico W guard, cooperative FIFO wait, status/levels/PC, force-clear IRQ
begeistert
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Rename interop assembly nanoFramework.Hardware.Rp2040 -> nanoFramework.Hardware.Rpi
begeistert
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Bound the TX-FIFO drain loop with the same timeout guard as Put/Get
begeistert
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PIO: regenerate native interop for the managed event/Dispose additions; align to nf_hardware_rpi_native
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PIO: guard PioIrqVector behind !RP_PIO_REQUIRED so the Pico W build is warning-clean
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PIO: fix leftover Hardware.Rp2040 display labels after the Rpi rename
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PIO: standard license headers, fix file encoding, drop redundant CMake comments
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PIO: make nanoFramework.Hardware.Rpi a core library (skip the Interop marshalling layer)
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PIO: harden native input validation and decouple the PIO reset release
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Rename the native assembly to nanoFramework.Hardware.Pico
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Update the build glue for the Pico rename
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Harden PIO native input validation
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Document PIO support on the Pico targets
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Fix DrainTxFifo to drain the whole TX FIFO
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Fix RP2350 GPIO 32-47 aliasing in SetConsecutivePinDirs
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Regenerate native interop table for the FromEncoded metadata overload
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Prototype: DMA-backed bulk PIO read for PioStateMachine.Read
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Update Pico target README PIO examples for the renamed managed enums
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Implement PIO NativeRead with a native CLR thread-yield (WaitEvents)
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Implement PIO NativeWrite (TX mirror of NativeRead)
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Trim NativeRead/NativeWrite comments per review
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Name the FSTAT status bits in the PIO state-machine native
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Delete the double new lines generated by the stub generator
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Clean up PIO native code for type safety and style consistency
begeistert
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Code style fixes
nfbot
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Merge pull request #1 from nanoframework/nfbot/clang-format-fix/a515b948-d993-4345-a40b-44601f64b1d0
begeistert
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Merge remote-tracking branch 'fork/feat/rp2040-pio-hardware' into feat/rp2040-pio-hardware
begeistert
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Enhance PIO native code style and readability
begeistert
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Commits on Jul 25, 2026

Commits on Jul 26, 2026