mhsw-espurna/code/espurna/gpio.h

/*

GPIO MODULE

Copyright (C) 2017-2019 by Xose Pérez <xose dot perez at gmail dot com>

*/

#pragma once

#include "settings.h"
#include "libs/BasePin.h"

#include <cstddef>

enum class GpioType : int {
    None,
    Hardware,
    Mcp23s08
};

class GpioBase {
public:
virtual const char* id() const = 0;
virtual size_t pins() const = 0;
virtual bool lock(unsigned char index) const = 0;
virtual void lock(unsigned char index, bool value) = 0;
virtual bool valid(unsigned char index) const = 0;
virtual BasePinPtr pin(unsigned char index) = 0;
};

namespace settings {
namespace internal {

template <>
GpioType convert(const String& value);

} // namespace internal
} // namespace settings


GpioBase& hardwareGpio();
GpioBase* gpioBase(GpioType);

BasePinPtr gpioRegister(GpioBase& base, unsigned char gpio);
BasePinPtr gpioRegister(unsigned char gpio);

void gpioSetup();

inline size_t gpioPins(const GpioBase& base) {
    return base.pins();
}

inline size_t gpioPins() {
    return gpioPins(hardwareGpio());
}

inline bool gpioValid(const GpioBase& base, unsigned char gpio) {
    return base.valid(gpio);
}

inline bool gpioValid(unsigned char gpio) {
    return gpioValid(hardwareGpio(), gpio);
}

inline bool gpioLock(GpioBase& base, unsigned char gpio, bool value) {
    if (base.valid(gpio)) {
        bool old = base.lock(gpio);
        base.lock(gpio, value);
        return (value != old);
    }

    return false;
}

inline bool gpioLock(GpioBase& base, unsigned char gpio) {
    return gpioLock(base, gpio, true);
}

inline bool gpioLock(unsigned char gpio) {
    return gpioLock(hardwareGpio(), gpio);
}

inline bool gpioUnlock(GpioBase& base, unsigned char gpio) {
    return gpioLock(base, gpio, false);
}

inline bool gpioUnlock(unsigned char gpio) {
    return gpioUnlock(hardwareGpio(), gpio);
}

inline bool gpioLocked(const GpioBase& base, unsigned char gpio) {
    if (base.valid(gpio)) {
        return base.lock(gpio);
    }
    return false;
}

inline bool gpioLocked(unsigned char gpio) {
    return gpioLocked(hardwareGpio(), gpio);
}