i2cMaster.h

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/********************************************************************************************
*       File:       i2cMaster.h                                                             *
*       Version:    1.1.0                                                                   *
*       Date:       June 14, 2020                                                           *
*       Author:     Thomas Hørring Olsen                                                    *
*                                                                                           *
*********************************************************************************************
*                       i2cMaster class                                                     *
*                                                                                           *
*   This file contains the implementation of the class methods, used to communicate over    *
*   the I2C bus.                                                                            *
*                                                                                           *
*********************************************************************************************
*   (C) 2020                                                                                *
*                                                                                           *
*   uStepper ApS                                                                            *
*   www.ustepper.com                                                                        *
*   administration@ustepper.com                                                             *
*                                                                                           *
*   The code contained in this file is released under the following open source license:    *
*                                                                                           *
*           Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International         *
*                                                                                           *
*   The code in this file is provided without warranty of any kind - use at own risk!       *
*   neither uStepper ApS nor the author, can be held responsible for any damage             *
*   caused by the use of the code contained in this file !                                  *
*                                                                                           *
********************************************************************************************/
#ifndef _I2CMASTER_H_
#define _I2CMASTER_H_
 
#include <inttypes.h>
#include <avr/io.h>
#include <stdlib.h>
 
#define I2CFREE 0                       
 
#define READ  1                         
 
#define WRITE 0                         
 
#define START  0x08                     
 
#define REPSTART 0x10                   
 
#define TXADDRACK  0x18                 
 
#define TXDATAACK 0x28                  
 
#define RXADDRACK 0x40              
 
#define ACK 1                           
 
#define NACK 0                          
 
class i2cMaster
{
    private:
        uint8_t status;         
 
 
        bool cmd(uint8_t cmd);
        volatile uint8_t twsr;
        volatile uint8_t twbr;
        volatile uint8_t twdr;
        volatile uint8_t twcr;
        
    public:
 
        void* operator new(size_t size);
 
        i2cMaster(bool channel);
 
        i2cMaster(void);
        
        bool readByte(bool ack, uint8_t *data);
 
        bool read(uint8_t slaveAddr, uint8_t regAddr, uint8_t numOfBytes, uint8_t *data);
 
        bool start(uint8_t addr, bool RW);
        
        bool restart(uint8_t addr, bool RW);
        
        bool writeByte(uint8_t data);
        
        bool write(uint8_t slaveAddr, uint8_t regAddr, uint8_t numOfBytes, uint8_t *data);
 
        bool stop(void);
        
        uint8_t getStatus(void);
        
        void begin(void);
 
        void begin(bool channel);
};
 
#endif