c++ - 创建 MBed 库，错误 "expected an identifier"

Question

这是我的代码。当我尝试编译它时，出现错误“需要标识符”，我相信这与我格式化 Timer2 启动的方式有关。

我需要更改什么才能编译此代码？

非常感谢。

如果需要，我可以添加头文件。

#include "Timer2.h"
#include "LPC17xx.h"


unsigned int _presc;

Timer2::Timer2(unsigned long pres, ClockType cs) :
{
    power(1);
    prescale(pres);
    selectClock(cs);
}

Timer2::~Timer2()
{
    power(0);
}

void Timer2::prescale(unsigned int p)
{
    _presc = p-1;
    LPC_TIM2->PR = _presc;
}

unsigned long Timer2::getPrescale()
{
    return _presc;
}

void Timer2::capture0(ChangeType change, bool interrupt)
{
    LPC_PINCON->PINSEL0 |= (0x3<<8); //setup CAP2:0 on pin P0.4 DIP 30
    if ( change == rising) {
        LPC_TIM2->CCR |= 0x1;
        LPC_TIM2->CCR |= 0x0<<1;
    } else if ( change == falling) {
        LPC_TIM2->CCR |= 0x0;
        LPC_TIM2->CCR |= 0x1<<1;
    } else if( change == changing) {
        LPC_TIM2->CCR |= 0x1;
        LPC_TIM2->CCR |= 0x1<<1;
    }
    if (interrupt == true) {
        LPC_TIM2->CCR |= 0x1<<2;
    }
}

void Timer2::capture1(ChangeType change, bool interrupt)
{
    LPC_PINCON->PINSEL0 |= (0x3<<10); //setup CAP2:1 on pin P0.5 DIP 29
    if ( change == rising) {
        LPC_TIM2->CCR |= 0x1<<3;
        LPC_TIM2->CCR |= 0x0<<4;
    } else if ( change == falling) {
        LPC_TIM2->CCR |= 0x0<<3;
        LPC_TIM2->CCR |= 0x1<<4;
    } else if( change == changing) {
        LPC_TIM2->CCR |= 0x1<<3;
        LPC_TIM2->CCR |= 0x1<<4;
    }
    if (interrupt == true) {
        LPC_TIM2->CCR |= 0x1<<5;
    }
}

void Timer2::capture0Stop()
{
    LPC_PINCON->PINSEL0 |= (0x0<<8); //stop CAP2:0
    LPC_PINCON->PINSEL0 |= (0x0<<7);
}

void Timer2::capture1Stop()
{
    LPC_PINCON->PINSEL0 |= (0x0<<10); //stop CAP2:1
    LPC_PINCON->PINSEL0 |= (0x0<<9);
}

unsigned long Timer2::time_us()
{
    return _presc * LPC_TIM2->TC /96.0;
}

void Timer2::start()
{
    LPC_TIM2->TCR |= 0x0<<1;
    LPC_TIM2->TCR |= 0x1<<0;
}

void Timer2::stop()
{
    LPC_TIM2->TCR |= 0x0<<1;
    LPC_TIM2->TCR |= 0x0<<0;
}

void Timer2::reset()
{
    LPC_TIM2->TCR |= 0x1<<1;
}

void Timer2::match0(unsigned long value, bool stop, bool interrupt, bool reset, MatchAction action = nothing)
{
    if (action == nothing) {
        LPC_PINCON->PINSEL0 |= (0x0<<12);   //Select pin p0.6 (p8)
        LPC_PINCON->PINSEL0 |= (0x0<<11);   //Select pin p0.6 (p8)
    } else if (action == set0) {
        LPC_PINCON->PINSEL0 |= (0x3<<12);   //Select pin p0.6 (p8)
        LPC_TIM2->EMR |= 0x2<<5;            //Set pin low
    } else if (action == set1) {
        LPC_PINCON->PINSEL0 |= (0x3<<12);   //Select pin p0.6 (p8)
        LPC_TIM2->EMR |= 0x1<<5;            //Set pin high
    } else if (action == toggle) {
        LPC_PINCON->PINSEL0 |= (0x3<<12);   //Select pin p0.6 (p8)
        LPC_TIM2->EMR |= 0x3<<5;            //Toggle pin
    }
    LPC_PINCON->PINSEL0 |= (0x3<<12);   //Select pin p0.6 (p8)
    LPC_TIM2->MR0 = value;
    LPC_TIM2->MCR |= 0x0<<0;
    LPC_TIM2->MCR |= 0x0<<1;
    LPC_TIM2->MCR |= 0x0<<2;
    if (interrupt == true) {
        LPC_TIM2->MCR |= 0x1<<0;
    }
    if (reset == true) {
        LPC_TIM2->MCR |= 0x1<<1;
    }
    if (stop == true) {
        LPC_TIM2->MCR |= 0x1<<2;
    }

}

void Timer2::match1(unsigned long value, bool stop, bool interrupt, bool reset, MatchAction action = nothing)
{
    if (action == nothing) {
        LPC_PINCON->PINSEL0 |= (0x0<<14);   //Select pin p0.7 (p7)
        LPC_PINCON->PINSEL0 |= (0x0<<13);   //Select pin p0.7 (p7)
    } else if (action == set0) {
        LPC_PINCON->PINSEL0 |= (0x3<<14);   //Select pin p0.7 (p7)
        LPC_TIM2->EMR |= 0x2<<7;            //Set pin low
    } else if (action == set1) {
        LPC_PINCON->PINSEL0 |= (0x3<<14);   //Select pin p0.7 (p7)
        LPC_TIM2->EMR |= 0x1<<7;            //Set pin high
    } else if (action == toggle) {
        LPC_PINCON->PINSEL0 |= (0x3<<14);   //Select pin p0.7 (p7)
        LPC_TIM2->EMR |= 0x3<<7;            //Toggle pin
    }
    LPC_TIM2->MR1 = value;
    LPC_TIM2->MCR |= 0x0<<3;
    LPC_TIM2->MCR |= 0x0<<4;
    LPC_TIM2->MCR |= 0x0<<5;
    if (interrupt == true) {
        LPC_TIM2->MCR |= 0x1<<3;
    }
    if (reset == true) {
        LPC_TIM2->MCR |= 0x1<<4;
    }
    if (stop == true) {
        LPC_TIM2->MCR |= 0x1<<5;
    }
}

void Timer2::match2(unsigned long value, bool stop, bool interrupt, bool reset, MatchAction action = nothing)
{
    if (action == nothing) {
        LPC_PINCON->PINSEL0 |= (0x0<<16);   //Select pin p0.8 (p6)
        LPC_PINCON->PINSEL0 |= (0x0<<15);   //Select pin p0.8 (p6)
    } else if (action == set0) {
        LPC_PINCON->PINSEL0 |= (0x3<<16);   //Select pin p0.8 (p6)
        LPC_TIM2->EMR |= 0x2<<9;            //Set pin low
    } else if (action == set1) {
        LPC_PINCON->PINSEL0 |= (0x3<<16);   //Select pin p0.8 (p6)
        LPC_TIM2->EMR |= 0x1<<9;            //Set pin high
    } else if (action == toggle) {
        LPC_PINCON->PINSEL0 |= (0x3<<16);   //Select pin p0.8 (p6)
        LPC_TIM2->EMR |= 0x4<<9;            //Toggle pin
    }
    LPC_TIM2->MR2 = value;
    LPC_TIM2->MCR |= 0x0<<6;
    LPC_TIM2->MCR |= 0x0<<7;
    LPC_TIM2->MCR |= 0x0<<8;
    if (interrupt == true) {
        LPC_TIM2->MCR |= 0x1<<6;
    }
    if (reset == true) {
        LPC_TIM2->MCR |= 0x1<<7;
    }
    if (stop == true) {
        LPC_TIM2->MCR |= 0x1<<8;
    }
}

void Timer2::match3(unsigned long value, bool stop, bool interrupt, bool reset, MatchAction action = nothing)
{
    if (action == nothing) {
        LPC_PINCON->PINSEL0 |= (0x0<<18);   //Select pin p0.9 (p5)
        LPC_PINCON->PINSEL0 |= (0x0<<17);   //Select pin p0.9 (p5)
    } else if (action == set0) {
        LPC_PINCON->PINSEL0 |= (0x3<<18);   //Select pin p0.9 (p5)
        LPC_TIM2->EMR |= 0x2<<11;            //Set pin low
    } else if (action == set1) {
        LPC_PINCON->PINSEL0 |= (0x3<<18);   //Select pin p0.9 (p5)
        LPC_TIM2->EMR |= 0x1<<11;            //Set pin high
    } else if (action == toggle) {
        LPC_PINCON->PINSEL0 |= (0x3<<18);   //Select pin p0.9 (p5)
        LPC_TIM2->EMR |= 0x3<<11;            //Toggle pin
    }
    LPC_TIM2->MR3 = value;
    LPC_TIM2->MCR |= 0x0<<9;
    LPC_TIM2->MCR |= 0x0<<10;
    LPC_TIM2->MCR |= 0x0<<11;
    if (interrupt == true) {
        LPC_TIM2->MCR |= 0x1<<9;
    }
    if (reset == true) {
        LPC_TIM2->MCR |= 0x1<<10;
    }
    if (stop == true) {
        LPC_TIM2->MCR |= 0x1<<11;
    }
}

void Timer2::clockReset(unsigned long time, PinName match = p5)
{
    unsigned long t = time * 96.0;
    if (match == p5) {
        match3(t,0,1,1);
    } else if (match == p6) {
        match2(t,0,1,1);
    } else if (match == p7) {
        match1(t,0,1,1);
    } else if (match == p8) {
        match0(t,0,1,1);
    }
}

void Timer2::selectClock(ClockType clock)
{
    if (clock == Clock) {
        LPC_SC->PCLKSEL1 |=0x1<<12; //PCLK_peripheral set to Clock
        LPC_SC->PCLKSEL1 |=0x0<<13;
    } else if (clock == HalfClock) {
        LPC_SC->PCLKSEL1 |=0x0<<12; //PCLK_peripheral set to Clock/2
        LPC_SC->PCLKSEL1 |=0x1<<13;
    } else if (clock == QuarterClock) {
        LPC_SC->PCLKSEL1 |=0x0<<12; //PCLK_peripheral set to Clock/4
        LPC_SC->PCLKSEL1 |=0x0<<13;
    } else if (clock == EighthClock) {
        LPC_SC->PCLKSEL1 |=0x1<<12; //PCLK_peripheral set to Clock/8
        LPC_SC->PCLKSEL1 |=0x1<<13;
    }
}

void Timer2::power(bool on)
{
    if (on == true) {
        LPC_SC->PCONP |=0x1<22; //timer2 power on
    } else {
        LPC_SC->PCONP |=0x0<22; //timer2 power off}
    }
}

Answer 1

您的 Timer2 构造函数有一个流氓 :，当您有初始化列表时(即调用基类构造函数或设置类成员的值时)，会使用它。由于列表中没有标识符，因此您会收到错误。去掉冒号就可以了。