cs_Twi.h

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/*
 * Author: Crownstone Team
 * Copyright: Crownstone (https://crownstone.rocks)
 * Date: Dec 9, 2020
 * License: LGPLv3+, Apache License 2.0, and/or MIT (triple-licensed)
 */
 
#pragma once
 
#include <ble/cs_Nordic.h>
#include <cfg/cs_Boards.h>
#include <events/cs_EventListener.h>
 
enum class TwiIsrEvent { Read, Write, Error };
class Twi : public EventListener {
public:
    static Twi& getInstance();
 
    void init(const boards_config_t& board);
 
    void initBus(cs_twi_init_t& twi);
 
    void write(uint8_t address, uint8_t* data, size_t length, bool stop);
 
    void read(uint8_t address, uint8_t* data, size_t& length);
 
    void handleEvent(event_t& event);
 
    void isrEvent(TwiIsrEvent event);
 
protected:
    // Local struct to store configuration.
    static const nrfx_twi_t _twi;
 
private:
    Twi();
    Twi(Twi const&);
    void operator=(Twi const&);
 
    // Local config for driver
    nrfx_twi_config_t _config;
 
    // Initialized flag
    bool _initialized;
 
    // Initialized flag
    bool _initializedBus;
 
    // Event is read
    bool _eventRead;
 
    // Error event
    bool _eventError;
};