trigger.hpp

Go to the documentation of this file.

#ifndef SBL_CORE_COMPONENTS_CV_TRIGGER_HPP_
#define SBL_CORE_COMPONENTS_CV_TRIGGER_HPP_
 
/**
 * @file trigger.hpp
 * @brief CV trigger pulse generator
 * @ingroup components
 */
 
#include <sbl/patterns/timing/non_blocking_delay.hpp>
 
namespace sbl {
namespace core {
namespace components {
namespace cv {
 
/**
 * @brief CV trigger pulse generator
 * 
 * Generates precise trigger pulses for Eurorack CV outputs.
 * Standard 10ms pulse duration with configurable timing.
 * 
 * @tparam PinImpl GPIO pin implementation
 * @tparam TimerImpl Timer implementation for pulse timing
 */
template<typename PinImpl, typename TimerImpl>
class Trigger {
public:
    /**
     * @brief Construct trigger generator
     * @param pin GPIO pin for trigger output
     * @param pulse_ms Pulse duration in milliseconds (default: 10ms)
     */
    Trigger(PinImpl& pin, uint32_t pulse_ms = 10) 
        : pin_(pin), pulseDuration_(pulse_ms), active_(false) {
        pin_.setMode(sbl::core::hal::PinMode::Output);
        pin_.write(false);
    }
    
    /**
     * @brief Fire trigger pulse
     * 
     * Starts trigger pulse. Call update() regularly to handle timing.
     */
    void fire() {
        pin_.write(true);
        pulseTimer_.start(pulseDuration_);
        active_ = true;
    }
    
    /**
     * @brief Update trigger state
     * 
     * Call regularly from main loop to handle pulse timing.
     */
    void update() {
        if (active_ && pulseTimer_.hasExpired()) {
            pin_.write(false);
            active_ = false;
        }
    }
    
    /**
     * @brief Check if trigger is currently active
     * @return true if pulse is active
     */
    bool isActive() const {
        return active_;
    }
    
private:
    PinImpl& pin_;
    sbl::core::patterns::timing::NonBlockingDelay<TimerImpl> pulseTimer_;
    uint32_t pulseDuration_;
    bool active_;
};
 
} // namespace cv
} // namespace components
} // namespace core
} // namespace sbl
 
#endif // SBL_CORE_COMPONENTS_CV_TRIGGER_HPP_