ChannelStore.h

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// The board-side view of everything the phone can send: one slot per input channel with the
// last value received, plus the callbacks to fire. Written by the Server when a characteristic
// is written, read by PhyphoxBLE::read() and by the sketch's callbacks.
#ifndef PHYPHOX_BLE_CORE_CHANNELSTORE_H
#define PHYPHOX_BLE_CORE_CHANNELSTORE_H
 
#include <stdint.h>
#include "Config.h"
#include "ElementData.h"
 
namespace phyphox {
 
class ChannelStore {
public:
    void attach(uint8_t channels, void* storage);
    static size_t bytesNeeded(uint8_t channels);
    void clear();
    void setDefault(uint8_t channel, float value);
    void setCallbacks(uint8_t channel, ChangeCallback onChange, PressCallback onPress);
    void deliver(uint8_t channel, float value);
    float value(uint8_t channel) const;
    uint32_t updates(uint8_t channel) const;
    bool changed(uint8_t channel);
 
private:
    struct Slot {
        float value = 0;
        uint32_t updates = 0;
        uint32_t seen = 0;
        ChangeCallback onChange = nullptr;
        PressCallback onPress = nullptr;
    };
    Slot* slots_ = nullptr;   
    uint8_t channels_ = 0;
};
 
enum EventType : uint8_t { EVENT_PAUSE = 0x00, EVENT_START = 0x01, EVENT_CLEAR = 0x02, EVENT_SYNC = 0xff };
struct ExperimentEvent {
    EventType type = EVENT_PAUSE;
    int64_t experimentTimeMs = 0;   
    int64_t systemTimeMs = 0;       
    bool decode(const uint8_t* bytes, uint16_t len);
};
 
} // namespace phyphox
 
#endif