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- To: crisos@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [crisos] DarwinFox SDK
- From: Claudio <claudyus84@xxxxxxxxx>
- Date: Wed, 18 Feb 2009 14:08:52 +0100
- Cc: Sergio Tanzilli <tanzilli@xxxxxxxxxxxxxx>
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Hi
2009/2/15 Douglas Gilbert <dgilbert@xxxxxxxxxxxx>:
> Frederic AYRAULT wrote:
>>
>> Hi all,
>>
>> I am trying to connect a LCD display
>> (http://foxlx.acmesystems.it/?id=8021)
>> and a temperature sensor (http://foxlx.acmesystems.it/?id=89)
>> on my Fox running darwinfox 8.09-4.
>
> Be warned the temperature sensor code has one very nasty
> bug. It is nasty because it looks like it is working
> but gives temperatures that are off by up to 2 C sometimes.
>
> The C type of Lsb and Msb cannot be "char"! That causes
> this to happen after sign extension (for example):
> Msb = 0x2
> Lsb = 0x80
>
> (Msb << 8) + Lsb -----> res
> (0x2 << 8) + 0x80 -----> 0x180
> Ouch! Change the type of Lsb to "unsigned char" and the sum
> is 0x280 as expected.
>
Thanks fixed in r121 (packages feed).
> I emailed Sergio T. and he said that he would correct the web
> page but it ain't happened yet.
>
> BTW My testing was on the Phrozen SDK. I expect the same
> bug would show up in Crisos.
>
>
> Doug Gilbert
>
>
>> I am just able to test gpio with a LED and a switch using setbits and
>> readbits (http://foxlx.acmesystems.it/?id=17)
>>
>> I would like to do the same tests using GPIO syscalls
>> (http://foxlx.acmesystems.it/?id=22)
>> but when I try to get the SDK using svn co
>> svn://svn.tuxfamily.org/svnroot/crisos/svn/target/darwinfox,
>> I do not get the openwrt trunk : A darwinfox/helper
>> A darwinfox/helper/patch
>> A darwinfox/patches
>> A darwinfox/patches/900-crypto_workaround.patch
>> A darwinfox/patches/N0003-add-patch-for-2.6.28.patch
>> A darwinfox/patches/800-enable_ipkg.patch
>> A
>> darwinfox/patches/N0002-fix-typo-and-make-subtarget-appear-in-menuconfig.patch
>> A darwinfox/patches/001-base-files.patch
>> A darwinfox/patches/N0007-netus-now-override-at91.patch
>> A darwinfox/patches/N0004-XXX-Da-reingegnarizzare.patch
>> A darwinfox/patches/N0001-initial-import-for-netus.patch
>> A darwinfox/patches/N0005-XXX-DA-reingegnerizzare-2.patch
>> A darwinfox/patches/N0006-fix-netus-build.patch
>> A darwinfox/README.map
>> A darwinfox/Makefile
>> A darwinfox/README
>> U darwinfox
>> Checked out revision 118.
>>
>> Thank you for your help.
>>
>> Regards,
>>
>> Frederic.
>>
>> PS : Thank you Claudio for CrisOs
>>
>>
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>>
>
>
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