Hi Patrick,
On 7/09/2018 1:39 AM, Patrick O'Banion (TMMC) wrote:
~/development/rtems/5
~/development/rtems/src/kernel
~/development/rtems/src/kernel/erc32
~/development/rtems/src/kernel/rtems
~/development/rtems/src/rtems-source-builder
Etc..
If I build a new set of build tools, can they share these directories? I expect I will get a second set of
"arm" build tools in my "~/development/rtems/5/bin" directory. I can see how in the
src/kernel I can create a new build directory. For example "~/development/rtems/src/kernel/arm"
and recompile rtems for an arm processor there without disturbing the erc32 build. But what do you typically
do for the tools? I could archive them in a new directory or just change the dir name to something erc32
specific... There are probably numerous ways to handle it, I was just wondering if there is a standard
method most rtems users prefer.
I have not used two build trees on the same RTEMS version before, so
can't really help here, but I would imagine that they would all fit OK
in the same directory structure as all the specific build tools are
named with the processor type. Maybe other can comment on this better.
2. My final targets are an adafruit M4 Metro
(https://learn.adafruit.com/adafruit-metro-m4-express-featuring-atsamd51/overview)
and an adafruit Trinket Pro (https://www.adafruit.com/product/2000). Could
someone maybe help suggest the closest BSP for these boards? I don't mind
attempting to build/modify the BSPs. I think with some help from the rtems
community and google I could do it.
The ATSAMD51 is a Cortex-M4 processor, which is a ARMv7-M architecture.
We use Cortex-M3 and M4 processors but not with RTEMS, as their memory
footprints are quite small. Your closest BSP in RTEMS5 would be,
according to :
https://devel.rtems.org/wiki/TBR/Website/Board_Support_Packages
The NXP LPC40XX, but looknig in the current tree I don't see a
rtems/bsps/arm/lpx40xx maybe someone else can point you to one of them.
The next closest would be the Cortex-M3 (but if you want floating point
hardware support you will need to change the compiler options). Look at
the following:
rtems/bsps/arm/lpc176x
rtems/bsps/arm/lpc176x
I just noticed that the:
rtems/bsps/arm/lm3s69xx
contains at least one Cortex-M4 config which is for the LM4F120.
Also the Atmel, now Microchip peripherals are quite different to the NXP
and others, so you might be able to share some code from the:
rtems/bsps/arm/atsam
Maybe the peripherals are the same or similar.
regards,
Ian Caddy
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