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

From: Bjarne Laursen
Subject: Re: [avr-gcc-list] use of specifin RAM location
Date: Wed, 30 Nov 2005 10:49:43 +0100
User-agent: Mozilla Thunderbird 0.7.3 (Windows/20040803)

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:

One way of doing this, is:
1: Write the adresse
2: Cast it to a pointer of the appropiate type
3: Dereference the pointer

*((int*)0x1234) = 1;

-- or  --

   char reg1;
   char reg1;
} TDeviceX;

((TDeviceX*)0x1234)->reg1 = 255;

Of cause, you should not allocate variables this way that is also allocated by the linked.



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