spi.hpp

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#pragma once
 
#include <concepts>
#include <cstdint>
#include <span>
 
namespace epaper::hal {
 
template <typename T>
concept SpiBus = requires(T bus, std::uint8_t byte, std::span<const std::byte> data) {
  { bus.transfer(byte) } -> std::same_as<std::uint8_t>;
  { bus.write(data) } -> std::same_as<void>;
};
 
} // namespace epaper::hal