pins.h

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#pragma once
 
#include <stdint.h>
 
namespace ersa {
namespace board {
 
enum class PinFunction { Gpio, I2c, Spi, Adc };
enum class PinPull { None, Up, Down };
enum class PinActiveLevel { High, Low };
enum class PinDirection { Input, Output, Peripheral };
 
struct Pin {
    int number{-1};
    PinFunction function{PinFunction::Gpio};
    PinPull pull{PinPull::None};
    PinActiveLevel activeLevel{PinActiveLevel::High};
    PinDirection direction{PinDirection::Peripheral};
};
 
struct I2cPins { Pin sda; Pin scl; };
struct SpiPins { Pin clock; Pin controllerOut; Pin controllerIn; };
struct DisplayPins { Pin chipSelect; Pin dataCommand; Pin reset; Pin busy; };
struct ButtonPins { Pin top; Pin bottom; };
struct BatteryPins {
    Pin adc;
    uint8_t voltageScaleNumerator{1};
    uint8_t voltageScaleDenominator{1};
};
 
class Pins {
public:
    virtual ~Pins() = default;
    virtual const I2cPins& i2c() const = 0;
    virtual const SpiPins& spi() const = 0;
    virtual const DisplayPins& display() const = 0;
    virtual const ButtonPins& buttons() const = 0;
    virtual const BatteryPins& battery() const = 0;
};
 
} // namespace board
} // namespace ersa