CpuDisplay.hxx

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#ifndef _UTILS_CPUDISPLAY_HXX_
#define _UTILS_CPUDISPLAY_HXX_
 
#include "executor/StateFlow.hxx"
#include "freertos_drivers/common/CpuLoad.hxx"
 
class CpuDisplay : public StateFlowBase
{
public:
    CpuDisplay(Service *s, const Gpio *red, const Gpio *green)
        : StateFlowBase(s)
        , timer_(this)
        , red_(red)
        , green_(green)
    {
        start_flow(STATE(delay));
    }
 
    Action delay()
    {
        return sleep_and_call(&timer_, MSEC_TO_NSEC(50), STATE(update_display));
    }
 
    Action update_display()
    {
        uint8_t load = CpuLoad::instance()->get_load();
        if (load < 20)
        {
            green_->set();
            red_->clr();
        }
        else if (load < 75)
        {
            green_->set();
            red_->set();
        }
        else
        {
            green_->clr();
            red_->set();
        }
        return call_immediately(STATE(delay));
    }
 
private:
    StateFlowTimer timer_;
    const Gpio *red_;
    const Gpio *green_;
};
 
#endif // _UTILS_CPUDISPLAY_HXX_