[meta-freescale] Getting started on iMX6 DL development

[Jeff Waller]

Hey Daiane,

Thanks for the reply, yea I was able to simply clone into the top level poky directory,
but perhaps it would be better to clone in another location an then copy.  As I
suspected defining another machine ‘fixed’ the problem and the compilation was
successful.  But now I’m not sure how to run this in the emulator or if it can
be done.  According to the discussion list, qemu does support Cortex-A9 except
for some minor aspects which I don’t think will affect me.

As far as upgrading to something newer then 1.5; that’s out of my control because
this is a selection of the manufacturer. I think it’s Dora anyway based on system
information.

I simply ended up picking a supported BSP from the list that was “close” to 
what I’m guessing is the actual hardware

Build Configuration:
BB_VERSION        = "1.20.0"
BUILD_SYS         = "x86_64-linux"
NATIVELSBSTRING   = "Ubuntu-14.04"
TARGET_SYS        = "arm-poky-linux-gnueabi"
MACHINE           = "imx6dlsabresd"
DISTRO            = "poky"
DISTRO_VERSION    = "1.5.4"
TUNE_FEATURES     = "armv7a vfp neon callconvention-hard cortexa9"
TARGET_FPU        = "vfp-neon"

But it’s not quite the same, for instance, the actual hardware supports

swp half thumb fastmult vfp edsp neon vfpv3 tls

It would be nice to build up a more correct profile; I’m not quire sure how to
begin on that one.


-Jeff



> On Nov 9, 2015, at 8:13 AM, Daiane Angolini <daiane.list at gmail.com> wrote:
> 
> On Mon, Nov 9, 2015 at 2:53 AM, Jeff Waller <truthset at gmail.com <mailto:truthset at gmail.com>> wrote:
>> Hello all,
>> 
>> I’m trying to develop for a drone, which is using the following CPU
>> 
>> root at 3dr_solo:~# cat /proc/cpuinfo
>> processor : 0
>> model name : ARMv7 Processor rev 10 (v7l)
>> BogoMIPS : 1988.29
>> Features : swp half thumb fastmult vfp edsp neon vfpv3 tls
>> CPU implementer : 0x41
>> CPU architecture: 7
>> CPU variant : 0x2
>> CPU part : 0xc09
>> CPU revision : 10
>> 
>> Hardware : Freescale i.MX6 Quad/DualLite (Device Tree)
>> Revision : 0000
>> Serial : 0000000000000000
>> 
>> my first attempt is to get nodejs running on it which seems to be
>> straightforward, however, the compilation fails with the error
>> 
>> unrecognized argument in option -mfpu=vfpv2
>> 
>> which I think is correct, it isn’t supported, either by the chipset or qemu.
>> My thought is that if I were to
>> set the correct hardware (MACHINE variable) (it’s currently defaulted to
>> “qemuarm")  then the compiler options might change and I could avoid this
>> problem.
>> 
>> I don’t need to create the entire image, just an rpm — at least to begin
>> with.
>> 
>> this is for 1.5 (Dora)
>> 
>> The instructions here
>> https://github.com/Freescale/fsl-community-bsp-platform
>> and https://github.com/Freescale/fsl-community-bsp-base seem to conflict
>> with
>> other yocto documentation.
>> 
>> Can't I simply clone/copy the various meta projects into a sub directory of
>> pokey?
> 
> I would start upgrading the yocto/poky version you are using. 1.5 is
> way too old now (we are at 2.0)
> 
> FSL Community BSP is a side project along with Yocto Project. And we
> think it's easier for us to use repo to dowload the base layers, but
> it's absolutely possible to git clone each metalayer one by one (or
> even change the repo to get the layers tailored to your use)
> 
> Take a look here [1] to understand what FSL Community BSP is
> 
> [1] http://freescale.github.io/doc/release-notes/2.0/ <http://freescale.github.io/doc/release-notes/2.0/>
> 
>> 
>> https://github.com/Freescale/meta-fsl-arm <https://github.com/Freescale/meta-fsl-arm>
>> https://github.com/Freescale/meta-fsl-arm-extra <https://github.com/Freescale/meta-fsl-arm-extra>
>> 
>> is there anything I’m missing?
> 
> I have never (truly) tested qemuarm, try to reproduce the same you
> have using a jethro (2.0) and if it is still happening I can take a
> look.
> 
> Daiane
>> 
>> 
>> -Jeff
>> 
>> 
>> 
>> --
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