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[avr-gcc-list] Someting I don"t understand with PGM_P et pgm_read_byte_f

From: Bernard Fouché
Subject: [avr-gcc-list] Someting I don"t understand with PGM_P et pgm_read_byte_far()
Date: Tue, 01 Mar 2005 16:44:35 +0100
User-agent: Mozilla Thunderbird 1.0 (Windows/20041206)

Hi there.

I'm trying to compile for ATMEGA128. I sometimes need to use pgm_read_byte(). For instance with:

uint8_t  f(PGM_P p)
   return pgm_read_byte_far(p);

When doing so, the compiler says:
"warning: cast from pointer to integer of different size".

So it appears that, even for an ATMEGA128, a PGM_P data type is a 16 bits pointer. How can I tell the compiler that 'p' is a 32 bits address in flash in a proper way?

I'm using avr-libc-1.0.4 and avr-gcc 3.4.3.



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