Library for RAM chip

Using Arduino Storage
15

Thanks for the help, I just have one more error:

C:\Program Files (x86)\arduino-0022\libraries\AM9111\AM9111.cpp: In member function 'int AM9111::_read()':
C:\Program Files (x86)\arduino-0022\libraries\AM9111\AM9111.cpp:74: error: lvalue required as left operand of assignment

and here is my code:

header:

#ifndef AM9111_h
#define AM9111_h


#include "WProgram.h"

class AM9111
{
  public:
    AM9111(uint8_t outputDisablePin, uint8_t writeEnablePin);  // constructor wit two pind
    int read(unsigned int address);
    int write(unsigned int address, uint8_t value);
    int setIO(uint8_t IO0, uint8_t IO1, uint8_t IO2, uint8_t IO3);

  private:
    void _setAddress(unsigned int address);
    int _read();
    int _write(uint8_t value);
    // internal pin admin
    uint8_t _odp;  
    uint8_t _wep;
    uint8_t _IO[];
    uint8_t _rbits;
};
#endif

source:

#include "AM9111.h"
#include "WProgram.h"

/////////////////////////////////////////
//
// PUBLIC
//
AM9111::AM9111(uint8_t outputDisablePin, uint8_t writeEnablePin)
{
  _odp = outputDisablePin;
  _wep = writeEnablePin;
}

int AM9111::setIO(uint8_t IO0, uint8_t IO1, uint8_t IO2, uint8_t IO3)
{
  _IO[0] = IO0;
  _IO[1] = IO1;
  _IO[2] = IO2;
  _IO[3] = IO3;
}
  

int AM9111::read(unsigned int address)
{
  int rv = 0;
  _setAddress(address);
  rv = _read();
  return rv;
}

int AM9111::write(unsigned int address, uint8_t value)
{
  int rv = 0;
  _setAddress(address);
  rv = _write(value);
  return rv;
}

/////////////////////////////////////////
//
// PRIVATE
//
void AM9111::_setAddress(unsigned int address)
{
for(int p=0; p<8; p++)
{
  pinMode(p, OUTPUT);
  digitalWrite(p, bitRead(address, p));
}
}


int AM9111::_read()
{
  digitalWrite(_odp,0);
  digitalWrite(_wep,1); 
  int rv = 0;
  bitWrite(_rbits,0,digitalRead(_IO[0]));
  bitWrite(_rbits,1,digitalRead(_IO[1]));
  bitWrite(_rbits,2,digitalRead(_IO[2]));
  bitWrite(_rbits,3,digitalRead(_IO[3]));
  _read() = _rbits;
  return rv;
}


int AM9111::_write(uint8_t value)
{
  digitalWrite(_odp,1);
  digitalWrite(_wep,0);
  int  rv = 0;
  digitalWrite(_IO[0],bitRead(0,value));
  digitalWrite(_IO[1],bitRead(1,value));
  digitalWrite(_IO[2],bitRead(2,value));
  digitalWrite(_IO[3],bitRead(3,value));
  return rv;
}

Program:

#include <AM9111.h>

AM9111 ram(12,13);

void setup()
{
  Serial.begin(9600);
  ram.setIO(8,9,10,11);
  ram.write(0,12);
  Serial.print("Read: ");
  Serial.print(ram.read(0));
};
void loop(){};