Re: [crisos] DarwinFox SDK

[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.

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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