SPIDevice.h

Go to the documentation of this file.

/*
 * SPIDevice.h  Created on: 22 May 2014
 * Copyright (c) 2014 Derek Molloy (www.derekmolloy.ie)
 * Made available for the book "Exploring BeagleBone"
 * See: www.exploringbeaglebone.com
 * Licensed under the EUPL V.1.1
 *
 * This Software is provided to You under the terms of the European
 * Union Public License (the "EUPL") version 1.1 as published by the
 * European Union. Any use of this Software, other than as authorized
 * under this License is strictly prohibited (to the extent such use
 * is covered by a right of the copyright holder of this Software).
 *
 * This Software is provided under the License on an "AS IS" basis and
 * without warranties of any kind concerning the Software, including
 * without limitation merchantability, fitness for a particular purpose,
 * absence of defects or errors, accuracy, and non-infringement of
 * intellectual property rights other than copyright. This disclaimer
 * of warranty is an essential part of the License and a condition for
 * the grant of any rights to this Software.
 *
 * For more details, see http://www.derekmolloy.ie/
 */

#ifndef SPIDEVICE_H_
#define SPIDEVICE_H_
#include<string>
#include<stdint.h>
#include"BusDevice.h"

#define SPI_PATH "/dev/spidev" 
namespace exploringBB{

class SPIDevice:public BusDevice {
public:
        enum SPIMODE{
                MODE0 = 0,   
                MODE1 = 1,   
                MODE2 = 2,   
                MODE3 = 3    
        };

private:
        std::string filename;  
public:
        SPIDevice(unsigned int bus, unsigned int device);
        virtual int open();
        virtual unsigned char readRegister(unsigned int registerAddress);
        virtual unsigned char* readRegisters(unsigned int number, unsigned int fromAddress=0);
        virtual int writeRegister(unsigned int registerAddress, unsigned char value);
        virtual void debugDumpRegisters(unsigned int number = 0xff);
        virtual int write(unsigned char value);
        virtual int write(unsigned char value[], int length);
        virtual int setSpeed(uint32_t speed);
        virtual int setMode(SPIDevice::SPIMODE mode);
        virtual int setBitsPerWord(uint8_t bits);
        virtual void close();
        virtual ~SPIDevice();
        virtual int transfer(unsigned char read[], unsigned char write[], int length);
private:
        SPIMODE mode;     
        uint8_t bits;     
        uint32_t speed;   
        uint16_t delay;   
};

} /* namespace exploringBB */

#endif /* SPIDEVICE_H_ */