将函数参数传递给类函数指针参数

Question

试图在Arduino中创建一个可以轻松处理毫秒延迟的类。 我的想法是创建一个类，您可以在其中传递要运行的函数以及延迟时间。 调用run方法会检查延迟时间是否已过去，并且可以运行该函数。

MillisTimer MT_measureAndWrite(measureAndWrite, 1000);

measureAndWrite函数具有void返回类型和零参数。 我能够做到这一点。 运行良好。

但是我遇到了一个我想使用带有参数的函数的问题。 我尝试使用模板类，但没有运气

MillisTimer<float, float, float, float> MT_LCDrefresh(LCDrefresh(1.5,2.5,3.5,4,5), 500);


template <class A = void, class B = void, class C = void, class D = void>
class MillisTimer
{
private:

    void(*mFunc0)(A,B,C,D);
    const uint16_t mDelayTime;
    unsigned long mPreviousTime;
    const bool mDebugMode;

public:
    MillisTimer(void(*func)(), uint16_t delayTime, bool debugMode = false) : mDelayTime(delayTime), mDebugMode(debugMode)
    {
        mFunc0 = func;
        mPreviousTime = millis();
    }
    MillisTimer(void(*func)(A), uint16_t delayTime, bool debugMode = false) : mDelayTime(delayTime), mDebugMode(debugMode)
    {
        mFunc0 = func;
        mPreviousTime = millis();
    }
    MillisTimer(void(*func)(A, B), uint16_t delayTime, bool debugMode = false) : mDelayTime(delayTime), mDebugMode(debugMode)
    {
        mFunc0 = func;
        mPreviousTime = millis();
    }
    MillisTimer(void(*func)(A, B, C), uint16_t delayTime, bool debugMode = false) : mDelayTime(delayTime), mDebugMode(debugMode)
    {
        mFunc0 = func;
        mPreviousTime = millis();
    }
    MillisTimer(void(*func)(A, B, C, D), uint16_t delayTime, bool debugMode = false) : mDelayTime(delayTime), mDebugMode(debugMode)
    {
        mFunc0 = func;
        mPreviousTime = millis();
    }

    void run() {
        if (millis() - mPreviousTime >= mDelayTime)
        {
            if (mDebugMode) Serial.println("uId: " + String((unsigned long)this) + " millis: " + String(millis() + "ms"));
            mPreviousTime = millis();
            mFunc0();
        }
    }
};

---

解：

class MillisTimer
{
private:
    void (*mFunc)();
    const uint16_t mDelayTime;
    unsigned long mPreviousTime;
    const bool mDebugMode;

public:
    MillisTimer(void(*func)(), uint16_t delayTime, bool debugMode = false) : mDelayTime(delayTime), mDebugMode(debugMode), mPreviousTime(millis())
    {
        mFunc = func;
    }

    void run() {
        if (millis() - mPreviousTime >= mDelayTime)
        {
            if (mDebugMode) Serial.println("uId: " + String((unsigned long)this) + " millis: " + String(millis() + "ms"));
            mPreviousTime = millis();
            mFunc();
        }
    }
};

MillisTimer MT_measureAndWrite(measureAndWrite, 1000);
MillisTimer MT_LCDfrissit([](){LCDfrissit_(U_Akku, Teljesitmeny, U_Atlag, U_Korrekt);},500);

Answer 1

将函子直接传递给您的班级：

template <class F>
class MillisTimer
{
private:
    F mF;
    const uint16_t mDelayTime;
    unsigned long mPreviousTime = 0;
    const bool mDebugMode;

public:
    MillisTimer(F f, uint16_t delayTime, bool debugMode = false) :
        f(f), mDelayTime(delayTime), mPreviousTime(millis()), mDebugMode(debugMode)
    {
    }

    void run() {
        if (millis() - mPreviousTime >= mDelayTime)
        {
            if (mDebugMode) {
                Serial.println("uId: " + String((unsigned long)this)
                               + " millis: " + String(millis() + "ms"));
            }
            mPreviousTime = millis();
            mF();
        }
    }
};

template <typename F>
MillisTimer<F> MakeMillisTimer(F f, uint16_t delayTime, bool debugMode = false)
{
    return {f, delayTime, debugMode};
}

用法：

auto MT_measureAndWrite = MakeMillisTimer(&measureAndWrite, 1000);
auto MT_LCDrefresh =  = MakeMillisTimer([](){ LCDrefresh(1.5, 2.5, 3.5, 4, 5); }, 500);