bmp581_bus_interface.hpp

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#pragma once
 
#include <cstddef>
#include <cstdint>
#include <type_traits>
 
namespace bmp581 {
 
enum class Interface : uint8_t {
    Unspecified = 0,  
    I2c = 1,
    Spi = 2,
};
 
namespace detail {
 
template <typename Bus, typename = void>
struct DeclaredInterface {
    static constexpr Interface value = Interface::Unspecified;
};
 
template <typename Bus>
struct DeclaredInterface<Bus, std::void_t<decltype(Bus::kInterface)>> {
    static_assert(std::is_same_v<std::remove_cv_t<decltype(Bus::kInterface)>, Interface>,
                  "bmp581: the adapter's kInterface must be a bmp581::Interface");
    static constexpr Interface value = Bus::kInterface;
};
 
}  // namespace detail
 
template <typename Bus>
inline constexpr Interface kBusInterface = detail::DeclaredInterface<Bus>::value;
 
template <typename Derived>
class BusInterface {
public:
    bool WriteRegs(uint8_t reg, const uint8_t* data, std::size_t len) noexcept {
        return static_cast<Derived*>(this)->WriteRegs(reg, data, len);
    }
 
    bool ReadRegs(uint8_t reg, uint8_t* out, std::size_t len) noexcept {
        return static_cast<Derived*>(this)->ReadRegs(reg, out, len);
    }
 
    void DelayUs(uint32_t us) noexcept { static_cast<Derived*>(this)->DelayUs(us); }
 
    bool EnsureInitialized() noexcept {
        return static_cast<Derived*>(this)->EnsureInitialized();
    }
};
 
}  // namespace bmp581