Eeprom.h

   1 #ifndef AVR_EEPROM_H
   2 #define AVR_EEPROM_H
   3
   4 #include "Memory.h"
   5 #include "Hardware.h"
   6
   7 namespace avr {
   8
   9         class Register;
  10
  11         class Eeprom : public Hardware, public Memory {
  12                 public:
  13                         Eeprom(Bus & bus, unsigned int size);
  14                         ~Eeprom();
  15
  16                 public:
  17                         void writeToAddress(unsigned int addr, unsigned char val);
  18                         unsigned char readFromAddress(unsigned int addr);
  19
  20                 public:
  21                         bool attachReg(const char *name, IORegister *reg);
  22                         void regChanged( IORegister *reg );
  23                         void step();
  24
  25                 private:
  26                         void setEECR( unsigned char eecr );
  27
  28                 private:
  29                         unsigned int eear;
  30                         unsigned char oldEecr;
  31
  32                         enum {
  33                                 READY,
  34                                 READ,
  35                                 WRITE,
  36                                 WRITE_ENABLED
  37                         } state;
  38
  39                         static const unsigned int writeEnableCycles = 4;
  40                         static const unsigned int readCycles = 4;
  41                         static const unsigned int writeCycles = 2;
  42
  43                 private:
  44                         Register *eearl;
  45                         Register *eearh;
  46                         Register *eecr;
  47                         Register *eedr;
  48         };
  49
  50 }
  51
  52 #endif /*AVR_EEPROM_H*/