Wire.h

/* 
// This file is subject to the terms and conditions defined in
// file 'LICENSE.md', which is part of this source code package.
*/

#ifndef _APOLLO3_LIBRARIES_WIRE_H_
#define _APOLLO3_LIBRARIES_WIRE_H_

#include "Arduino.h"
#include "core-api/api/HardwareI2C.h"
#include "drivers/I2C.h"
#include "drivers/I2CSlave.h"
#include "rtos.h"

#define AP3_WIRE_RX_BUFFER_LEN 256
#define AP3_WIRE_TX_BUFFER_LEN 256

typedef void (*voidFuncPtrParamInt)(int);

namespace arduino {

class MbedI2C : public HardwareI2C
{
  public:
    MbedI2C(int sda, int scl);
    virtual void begin();
    virtual void begin(uint8_t address);
    virtual void end();

    virtual void setClock(uint32_t freq);
  
    virtual void beginTransmission(uint8_t address);
    virtual uint8_t endTransmission(bool stopBit);
    virtual uint8_t endTransmission(void);

    virtual size_t requestFrom(uint8_t address, size_t len, bool stopBit);
    virtual size_t requestFrom(uint8_t address, size_t len);

    virtual void onReceive(void(*)(int));
    virtual void onRequest(void(*)(void));

    virtual size_t write(uint8_t data);
    virtual size_t write(const uint8_t* data, int len);
    using Print::write;
    virtual int read();
    virtual int peek();
    virtual void flush();
    virtual int available();

private:

#ifdef DEVICE_I2CSLAVE
    mbed::I2CSlave* slave;
#endif
    mbed::I2C*      master;
    int _sda;
    int _scl;
    int _address;
    RingBufferN<AP3_WIRE_RX_BUFFER_LEN> rxBuffer;
    uint8_t txBuffer[AP3_WIRE_TX_BUFFER_LEN];
    uint32_t usedTxBuffer;
    voidFuncPtrParamInt onReceiveCb = NULL;
    voidFuncPtr onRequestCb = NULL;
    rtos::Thread slave_th;
    void receiveThd();
};

}

typedef arduino::MbedI2C TwoWire;

#if VARIANT_WIRE_INTFCS > 0
extern arduino::MbedI2C Wire;
#endif
#if VARIANT_WIRE_INTFCS > 1
extern arduino::MbedI2C Wire1;
#endif
#if VARIANT_WIRE_INTFCS > 2
extern arduino::MbedI2C Wire2;
#endif
#if VARIANT_WIRE_INTFCS > 3
extern arduino::MbedI2C Wire3;
#endif
#if VARIANT_WIRE_INTFCS > 4
extern arduino::MbedI2C Wire4;
#endif
#if VARIANT_WIRE_INTFCS > 5
extern arduino::MbedI2C Wire5;
#endif

#endif // _APOLLO3_LIBRARIES_WIRE_H_