From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Edward, Yan-Chi, Lin" <yanchi@oak.com.tw>
To: "Ecos-Discuss" <ecos-discuss@sourceware.cygnus.com>
Subject: [ECOS] How do I get __ARMEB__ defined ?
Date: Sun, 10 Dec 2000 19:23:00 -0000
Message-id: <NDBBIJMAFMCKGDEBEFICCENHFAAA.yanchi@oak.com.tw>
X-SW-Source: 2000-12/msg00217.html


Hi

I have a bigendian ARM cpu now, but I don't know how do I get __ARMEB__ defined ?
Also could someone explain what does the macro in hal_io.h for big endian means ?
Why ^3 ?

Thanks a lot
Edward Lin
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#else // Big-endian version

#define HAL_READ_UINT8( _register_, _value_ ) \
        ((_value_) = *((volatile CYG_BYTE *)((CYG_ADDRWORD)(_register_)^3)))

#define HAL_WRITE_UINT8( _register_, _value_ ) \
        (*((volatile CYG_BYTE *)((CYG_ADDRWORD)(_register_)^3)) = (_value_))