roboforum.ru

// External SRAM page configuration: 
//              -              / 0000h - FFFFh
// Lower page wait state(s): None
// Upper page wait state(s): 2r/w
MCUCR=0x80;
XMCRA=0x02;

void Write(unsigned int Adress, char Data)
{
  #asm("cli")
  DIR=0xFF;
  AD=*(char*)&Adress;
  ADR=*(char*)&Adress+1;
  PORTG|=0b100;
  PORTG&=~0b100;
  AD=Data;
  PORTG&=~0b001;
  #asm("nop")
  PORTG|=0b001;
  //AD=0;
  //ADR=0;
  DIR=0;
  #asm("sei")
}

char Read(char Adress)
{
  char data;
  #asm("cli")
  DIR=0xFF;
  AD=*(char*)&Adress;
  ADR=*(char*)&Adress+1;
  PORTG|=0b100;
  PORTG&=~0b100;
  DIR=0;
  PORTG&=~0b010;
  #asm("nop")
  data=DATAIN;
  PORTG|=0b010;
  #asm("sei")
  return data;  
}