Re: [ECOS] Big endian ARM HAL_WRITE_UINT8 problem (ecos 1.3.1)

[Grant Edwards <grante at visi dot com>]

On Wed, Jul 10, 2002 at 03:50:29PM -0600, Gary Thomas wrote:


> The macros are designed so that the same addresses should work for
> both big and little endian systems.  We've used this successfully on
> a number of ARM platforms which can operate in either endian mode.
> 
> Instead of using 0x0400c71f, try using the address as it would be in
> little endian form 0x0400c71c.

If you want to write to address 0x71f, you specify address
0x71c?  Doesn't anybody else thing that sounds a bit wierd? I
guess I understand what's going on, but it seems a bit silly to
make users of big-endian hardware munge up their register
addresses.

If I need to write to the byte at address 0x71f, then I want to
write 0x71f in my source code: that's why I don't use those
macros -- they don't work with pre-existing include files
containing my register definitions.

-- 
Grant Edwards
grante@visi.com

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