Using Both Cores of Raspberry Pi Pico with C++OS
summary
C++OS now runs both cores of the RP2040 and uses C++20 coroutines plus custom executors and event-based queues to synchronize non‑SMP hardware. Implementation avoids the Pico SDK by generating headers from the SVD, uses spinlock atomics and the RP2040 CPU spinlocks and FIFO for intercore signaling, connects an ISR-to-decoder pipeline with a queue with 16 entries, decodes Opus on the second core (decoder runs on core 1), and falls back to UART fallback for audio input; the system works for demos but contains debugging bugs.
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