[avr-gcc-list] How to access external SRAM

[Andreas Djojorahardjo]

Hi All,

 

I want to ask how to access external SRAM ?

I placed my LCD at adddress 0xC000-Control and 0xC001-Data.

 

#define LCD_CTRL 0xC000
void lcdControlWrite(U8 data)
{
 sbi(MCUCR, SRW);   // enable RAM waitstate

 

 lcdBusyWait();    // wait until LCD not busy
 *(volatile unsigned char *) (LCD_CTRL) = data;

 

 cbi(MCUCR, SRW);   // disable RAM waitstate
}

 

void main()

{

    sbi(MCUCR,SRE);

 

}

 

Could you help me to solve my problem ?

Would you give me the instruction for access the external memory ?

 

Thanks

 

Andreas