Cross gcc Mailing List Archive

Re: volital registers

Date: Fri, 1 Nov 1996 11:15:28 -0800
From:
Doug Evans <dje@cygnus.com>
Reply-To:
Doug Evans <dje@cygnus.com>
CC: crossgcc@cygnus.com
In-reply-to: <3279FE09.1763@snet.net> (message from Neville Mair on Fri, 01 Nov 1996 08:41:29 -0500)

   Date: Fri, 01 Nov 1996 08:41:29 -0500
   From: Neville Mair <nev@snet.net>

   This is what I have now

   #define SCSR (*(unsigned short *)0xfffC0C)
   #define SCDR (*(unsigned short *)0xfffC0E)

   This works OK until the the I do this

	   while (SCSR & 0X0100)  
		   ;
	   SCDR = c ;

   How do specify pointer to a volital area in memory?

volatile unsigned short *

[or is this a trick question? :-)]

   I would like to have the CPU's internal I/O show up 
   in the linker map
   so that if someone tries to map something else in 
   the same location the
   linker will give a warning or error.

Have you tried using a linker script?

References:

volital registers

From: Neville Mair <nev@snet.net>

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