pca9685_i2c_interface.hpp

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#pragma once
#include <cstddef>
#include <cstdint>
 
namespace pca9685 {
 
// ============================================================================
// GPIO Enums -- Standardised Control Pin Model
// ============================================================================
 
enum class CtrlPin : uint8_t {
  OE = 0 
};
 
enum class GpioSignal : uint8_t {
  INACTIVE = 0, 
  ACTIVE   = 1  
};
 
template <typename Derived>
class I2cInterface {
public:
  bool Write(uint8_t addr, uint8_t reg, const uint8_t* data, size_t len) noexcept {
    return static_cast<Derived*>(this)->Write(addr, reg, data, len);
  }
 
  bool Read(uint8_t addr, uint8_t reg, uint8_t* data, size_t len) noexcept {
    return static_cast<Derived*>(this)->Read(addr, reg, data, len);
  }
 
  bool EnsureInitialized() noexcept {
    return static_cast<Derived*>(this)->EnsureInitialized();
  }
 
  // --------------------------------------------------------------------------
 
  void GpioSet(CtrlPin pin, GpioSignal signal) noexcept {
    (void)pin;
    (void)signal;
  }
 
  void GpioSetActive(CtrlPin pin) noexcept {
    static_cast<Derived*>(this)->GpioSet(pin, GpioSignal::ACTIVE);
  }
 
  void GpioSetInactive(CtrlPin pin) noexcept {
    static_cast<Derived*>(this)->GpioSet(pin, GpioSignal::INACTIVE);
  }
 
 
  I2cInterface(const I2cInterface&) = delete;
  I2cInterface& operator=(const I2cInterface&) = delete;
  I2cInterface(I2cInterface&&) = delete;
  I2cInterface& operator=(I2cInterface&&) = delete;
 
protected:
  I2cInterface() = default;
 
  ~I2cInterface() = default;
};
 
} // namespace pca9685