Re: [avr-gcc-list] use of specifin RAM location

[Gary Douglas]

Here's how I set a memory mapped latch programmed into a CPLD:

//location in external memory - hard set by address lines:
#define PLD_LATCH 0x80c0

void set_pld(uint8_t data)
{
        uint8_t *pld;
        pld = (uint8_t*)PLD_LATCH;
        *pld = data;
}

Pretty simple, no linker tricks, and it just works!  Probably not so 
elegant, but functional.

Hope it helps.

<G>

varsha wrote:
> Hello all,
> I'm working on avr-gcc (GCC) 3.4.3 compiler and target MCU is Atmega 16
> i want to declare some variables, such that hey will take specific ram 
> locations...
> for ex:
>  
> as we do in assembly code as,
>  
> org (ramend-4) 
> date:   .byte 1
> month:   .byte 1
>  
> how to achieve this in c?
>  
> Thank you,
>
> regards,
> varsha
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Gary Douglas
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