cs_COMP.h

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/*
 * Author: Crownstone Team
 * Copyright: Crownstone (https://crownstone.rocks)
 * Date: Jan 31, 2017
 * License: LGPLv3+, Apache License 2.0, and/or MIT (triple-licensed)
 */
 
#pragma once
 
// TODO: requires symbol names to be preceded by std::
#include <cstdint>
 
#include "ble/cs_Nordic.h"
 
enum CompEvent_t {
    // The sampled value went above the upper threshold.
    COMP_EVENT_UP,
    // The sampled value went below the lower threshold.
    COMP_EVENT_DOWN,
    // The sampled value went above the upper threshold, or below the lower threshold.
    COMP_EVENT_CROSS,
    // Only used for configuration: When you want to get both UP, and DOWN events.
    COMP_EVENT_BOTH,
};
 
typedef void (*comp_event_cb_t)(CompEvent_t event);
 
class COMP {
public:
    // Use static variant of singleton, no dynamic memory allocation
    static COMP& getInstance() {
        static COMP instance;
        return instance;
    }
 
    void init(uint8_t ainPin, float thresholdDown, float thresholdUp, comp_event_cb_t callback);
 
    void start(CompEvent_t event);
 
    bool sample();
 
    void handleEventDecoupled(nrf_comp_event_t event);
 
    void handleEvent(nrf_comp_event_t event);
 
private:
    // This class is singleton, constructor is private
    COMP();
 
    // This class is singleton, deny implementation
    COMP(COMP const&);
 
    // This class is singleton, deny implementation
    void operator=(COMP const&);
 
    void applyWorkarounds() {
#ifdef NRF52_PAN_12
        *(volatile uint32_t*)0x40013540 = (*(volatile uint32_t*)0x10000324 & 0x00001F00) >> 8;
#endif
    }
 
    comp_event_cb_t _callback = nullptr;
};