From: "Ling Su" <lingsu@palmmicro.com>
To: "Jesper Skov" <jskov@redhat.com>
Cc: "Jonathan Larmour" <jlarmour@redhat.com>,
<ecos-discuss@sources.redhat.com>
Subject: Re: [ECOS] GDBstub porting for vrc4375
Date: Tue, 06 Feb 2001 10:26:00 -0000 [thread overview]
Message-ID: <006701c0906a$5160b7c0$0201a8c0@raccoon> (raw)
In-Reply-To: <ww44ry7yd3l.fsf@host176.cambridge.redhat.com>
> >> <2>. There are a 7-segment display on board, according to the
> >> document the address is 0x7c000000, I am trying to write to the
> >> address after system initialization, but it doesn't work. Anything
> >> wrong?
>
> Jonathan> Maybe PMON doesn't set up the MMU mappings for that?
>
> Or the CPU runs in big-endian mode and the LED is 8-bit addressed so
> you need to poke at 0x7c000000^3
>
In the document of this board, it mentioned the mapping and virtual address
is 0xc7000000 (Sorry, I made a typo last time). Actually I tried to write
to (*(cyg_uint8 *)(0x7c000000 + i)), in which i ranges from 0 to 0xFFFF, I
guess I should hit the right address. :-/
Regards,
-Ling
prev parent reply other threads:[~2001-02-06 10:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-05 20:22 Ling Su
2001-02-06 5:27 ` Jonathan Larmour
2001-02-06 9:01 ` Jesper Skov
2001-02-06 10:26 ` Ling Su [this message]
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