rtems-libbsd build error

Fri Apr 12 14:26:50 UTC 2019

On Wed, Apr 10, 2019 at 12:50 PM Christian Mauderer <
christian.mauderer at embedded-brains.de> wrote:

> Am 09.04.19 um 18:12 schrieb Vijay Kumar Banerjee:
> > Hi,
> >
> > I have imported and ported the the drivers in 2 pairs(import and port)
> > of commits
> > for each one. Please have a look at this branch
> > https://github.com/thelunatic/rtems-libbsd/commits/tda19988
>
> One detail: You have a commit named "tda19988.c: import from FreeBSD".
> Please remove the ".c".
>
> Noted.

> Maybe it would be a good idea to split of the I2C part and put it in
> front of the other two parts. You can develop and test that independent
> with a test that just accesses some of the I2C devices on the board via
> the FreeBSD API and the translation driver discussed below.
>
> This is a good idea, I'll import iicbus separately and add the other
two on top of it.

> >
> > I have also tried running the media01.exe and have seen it running fine
> > without
> > throwing any exceptions.
> >
> > I have used the fb.c and iicbus.c codes from the freebsd source. From
> > what I
> > understand, I think the next big steps would be to write an RTEMS
> > implementation layer for these portions of the code? And then a test in
> the
> > libbsd, like media01, to write to the /dev/fb0
> >
> > Can you please help me chalk out a rough outline of the next set of
> > actions? :)
>
> As far as I can tell, there are two possible I2C buses here:
>
> 1. The one between the AM335x and the TDA19988.
>
> 2. The one directly on the HDMI connector (called HDMI_DSCL and
> HDMI_DSDA). I assume that's an I2C bus too.
>
> For 1. the RTEMS driver should be used. You'll need some code that
> translates the FreeBSD API to the one used in RTEMS. Basically that will
> just be a FreeBSD-I2C-driver.
>
> For 2: If that even is an independent I2C bus, you can use the driver
> provided by FreeBSD. I don't think that it is necessary to translate to
> the RTEMS API here.
>
> I had a look at the iic and iicbus codes in freebsd and the bbb-i2c.c
This looks very confusing to me. Are we looking for something like a
rtems-iicbus.c in the rtemsbsd that works like a wrapper to the bbb-i2c
code, and uses the freebsd api of DEVMETHODs?

I've not been able to figure out at one look, how to relate them and
get a wrapper like that. Any suggestions on how to approach this?

Can we not totally use the iicbus in the freebsd source?

> >
> > Thanks
> >
> > On Tue, Apr 9, 2019 at 5:28 AM Chris Johns <chrisj at rtems.org
> > <mailto:chrisj at rtems.org>> wrote:
> >
> >     On 8/4/19 12:30 am, Vijay Kumar Banerjee wrote:
> >     > On Sun, Apr 7, 2019 at 6:24 PM Christian Mauderer
> >     <list at c-mauderer.de <mailto:list at c-mauderer.de>
> >     > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>> wrote:
> >     >     Am 07.04.19 um 14:50 schrieb Vijay Kumar Banerjee:
> >     >     > On Sun, Apr 7, 2019 at 6:08 PM Christian Mauderer
> >     <list at c-mauderer.de <mailto:list at c-mauderer.de>
> >     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >     >     > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>> wrote:
> >     >     >     Am 07.04.19 um 14:35 schrieb Vijay Kumar Banerjee:
> >     >     >     > On Sun, Apr 7, 2019 at 5:37 PM Christian Mauderer
> >     >     >     <list at c-mauderer.de <mailto:list at c-mauderer.de>
> >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> >     >     >     > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>> wrote:
> >     >     >     >     Am 07.04.19 um 13:08 schrieb Vijay Kumar Banerjee:
> >     >
> >     >     I don't think that there are a lot of docs for how to test.
> >     Although I'm
> >     >     sure that there are some scripts to run a number of libbsd
> >     tests, I'm
> >     >     not sure where. Maybe in the RTEMS tester but I think that is
> >     mainly for
> >     >     the core tests?
> >
> >     The documentation for testing can be found here ...
> >
> >      https://docs.rtems.org/branches/master/user/testing/index.html
> >
> >     > so far I know, RTEMS Tester is only for core tests.
> >
> >     The `rtems-test` command checks the for test start and end banners.
> >     I am not
> >     sure if libbsd supports the test banners. Maybe it could now with
> >     Sebastian's
> >     movement of the test support code into libtest.
> >
> >     > I'll ask in the devel if there's some way to run libbsd test with
> >     the tester.
> >
> >     There is the `rtems-run` command which has similar args to
> >     `rtems-test`. It does
> >     suffer from a limitation I have not fixed which is stdin is not
> >     passed through
> >     to the console of the target. I also think the command has a timeout
> >     running,
> >     but I am not sure about this one.
> >
> >     Chris
> >
>
> --
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