bus_priorities.h

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#pragma once

 
#include "fl/channels/bus.h"
#include "fl/stl/stdint.h"
 
// Platform CMSIS/Arduino headers may define SPI / UART / I2S as register
// pointer macros (e.g. Sam3X8E: `#define UART ((Uart*)0x400E0800U)`).
// Those macros expand inside qualified names like `Bus::SPI` below and
// produce a syntax error. bus.h itself uses push_macro/pop_macro around
// its enum definition; once bus.h pops the macros are restored. So we
// must apply the same guard locally here. See fl/channels/bus.h.
#pragma push_macro("UART")
#pragma push_macro("SPI")
#pragma push_macro("I2S")
#undef UART
#undef SPI
#undef I2S
 
namespace fl {

constexpr int default_bus_priority(Bus b) FL_NOEXCEPT {
    // FORCE-style overrides (FASTLED_ESP32_FORCE_*) are intentionally not
    // applied here -- the legacy initChannelDrivers() retains its own
    // priority-bumping logic for backward compatibility. This table is the
    // baseline used by the new enableDrivers<>() opt-in API.
    return
        b == Bus::I2S_SPI       ? 10 :
        b == Bus::LCD_SPI       ? 10 :
        b == Bus::PARLIO        ? 4  :
        b == Bus::LCD_RGB       ? 3  :
        b == Bus::RMT           ? 2  :
        b == Bus::LCD_CLOCKLESS ? 2  :
        b == Bus::I2S           ? 1  :
        b == Bus::FLEX_IO       ? 1  :
        b == Bus::OBJECT_FLED   ? 1  :
        b == Bus::SPI           ? 0  :
        b == Bus::BIT_BANG      ? 0  :
        b == Bus::STUB          ? 0  :
        b == Bus::UART          ? -1 :
        0;
}
 
}  // namespace fl
 
#pragma pop_macro("I2S")
#pragma pop_macro("SPI")
#pragma pop_macro("UART")