[PATCH] README for raspberry pi 4 AArch64 BSP

Fri Apr 14 14:43:29 UTC 2023

Thanks, for the confirmation. I'll add it to the docs.

On Fri, 14 Apr 2023 at 19:52, Gedare Bloom <gedare at rtems.org> wrote:

> On Mon, Apr 10, 2023 at 4:05 AM Noor Aman <nooraman5718 at gmail.com> wrote:
> >
> > Thanks for the suggestions,
> >
> > I'll wait for a few days to receive a confirmation or so and after that,
> I'll update the documentation instead of adding a README to RTEMS if
> required.
> >
> Yes, it is preferred to put this information to the docs as linked by
> Karel. Ask if you need help with that.
>
> > Thanks,
> >
> > On Sun, Apr 9, 2023, 10:39 PM Karel Gardas <karel at functional.vision>
> wrote:
> >>
> >>
> >> Hi,
> >>
> >> nice patch. I'm not sure if I'm right here, but I've thought the idea is
> >> to get rid of BSPs specific README files and move all the information
> >> into the RTEMS user docs. If I'm right, then it would be great if you
> >> merge your changes to the doc you already pointed out:
> >>
> >>
> https://docs.rtems.org/branches/master/user/bsps/bsps-aarch64.html#raspberry-pi-4b
> >>
> >> If you would like to work on that, then please clone the docs repo from
> >> here: git://git.rtems.org/rtems-docs.git
> >>
> >> and edit user/bsps/aarch64/raspberrypi4.rst file
> >>
> >> You will also need to have some tools installed in order to work on
> >> that, it is well described in the first paragraph here:
> >> https://docs.rtems.org/
> >>
> >> If you are unsure, wait for official deny or confirmation of the info
> >> provided by me...
> >>
> >> Thanks,
> >> Karel
> >>
> >> On 4/9/23 09:53, Mohd Noor Aman wrote:
> >> > The readme file includes all links and steps for setting up
> developping
> >> > environment for the raspberry pi 4. Added cheap JTAG adapters list
> which are
> >> > tried and tested. Links for references for raspberry pi 4 are also
> added.
> >> > ---
> >> >   bsps/aarch64/raspberrypi/README | 86
> +++++++++++++++++++++++++++++++++
> >> >   1 file changed, 86 insertions(+)
> >> >   create mode 100644 bsps/aarch64/raspberrypi/README
> >> >
> >> > diff --git a/bsps/aarch64/raspberrypi/README
> b/bsps/aarch64/raspberrypi/README
> >> > new file mode 100644
> >> > index 0000000000..9c6465fd5e
> >> > --- /dev/null
> >> > +++ b/bsps/aarch64/raspberrypi/README
> >> > @@ -0,0 +1,86 @@
> >> > +BSP for the Raspberry Pi aarch64 ArmV8 board
> >> > +
> >> > +It currently supports the following peripheral:
> >> > +-- Console using the PL011 UART0 Raspberry Pi 4 has 6 UARTs, 5 PL011
> based and 1
> >> > +   miniuart based. Only PL011 UART0 is supported. No support for
> Mini-UART. The
> >> > +   console driver only works with polled mode right now.
> >> > +
> >> > +-- The clock driver uses the ARM Generic Timer.
> >> > +
> >> > +-- GIC-400 is compatible with gicv2 headers and is supported by bsp
> >> > +
> >> > +
> >> > +How to boot: Steps on how to boot RTEMS on raspberry pi 4B is given
> here.
> >> > +
> >> > +
> https://docs.rtems.org/branches/master/user/bsps/bsps-aarch64.html#raspberry-pi-4b
> >> > +
> >> > +
> >> > +To do list: It would be nice to get support in the BSP for the
> following:
> >> > +    -- SD card
> >> > +    -- SPI
> >> > +    -- I2C
> >> > +    -- GPIO
> >> > +    -- Graphics console
> >> > +    -- Sound
> >> > +
> >> > +
> >> > +JTAG debugging: OpenOCD supports bcm2711 as a target. Many
> interfaces are
> >> > +supported to work with bcm2711. A few of them which I have tested
> personally
> >> > +are.
> >> > +
> >> > +FT232H: Nice and cheap adapter which supports SPI, I2C JTAG using
> MPSSE engine.
> >> > +It can either be used as a UART-to-USB or JTAG adapter at a time.
> >> > +
> >> > +Esp-prog: its just a FT2232H breakout board which can connect using
> FT2232H
> >> > +derivatives cfg
> >> > +
> >> > +Raspberry Pi SBC: Yes, you can use a raspberry pi to debug another
> raspberry pi
> >> > +
> >> > +Raspberry Pi Pico: As of now, openocd support for Raspberry pi Pico
> is under
> >> > +review, in the meantime you can just build forked version of
> OpenOCD, and use
> >> > +pico-dirtyJTAG.uf2 for raspberry pi pico.
> >> > +https://sourceforge.net/u/phdussud/openocd
> >> > +https://github.com/phdussud/pico-dirtyJtag
> >> > +
> >> > +Some of the interfaces which I have not used personally but can most
> probably be
> >> > +used are:
> >> > +
> >> > +FT2XXXH series :  They are of same family as FT232H, just have
> different amount
> >> > +of MPSSE engine, Which determines how many many protocols can be ran
> >> > +simultaneously.
> >> > +
> >> > +BeagleBone Black: It can be used with OpenOCDs am335xgpio drivers to
> be used as
> >> > +JTAG/SWD programmer
> >> > +
> >> > +Almost every SBC with GPIO: It can be used by openOCD through
> libgpiod library
> >> > +
> >> > +
> >> > +Openocd compilation steps for Raspberry pi:
> >> > +
> >> > +    git clone http://openocd.zylin.com/openocd
> >> > +    cd openocd
> >> > +    ./bootstrap
> >> > +    ./configure --enable-sysfsgpio --enable-bcm2835gpio
> >> > +    make -j$(nproc)
> >> > +
> >> > +
> >> > +Credits and links:
> >> > +
> >> > +  A bare metal example which includes examples for interrupts, SMP,
> bluetooth
> >> > +  https://github.com/isometimes/rpi4-osdev/
> >> > +
> >> > +  A Raspberry pi 4 port for RT-Thread which support Ethernet,
> mailbox and UARTs
> >> > +
> https://github.com/RT-Thread/rt-thread/tree/master/bsp/raspberry-pi/raspi4-64
> >> > +
> >> > +  Vxworks is a Real-Time OS which has a public SDK for
> development,not open
> >> > +  source. The steps for booting Vxworks is given here.
> >> > +
> https://labs.windriver.com/downloads/wrsdk-vxworks7-docs/2203/README_raspberrypi4b.html
> >> > +
> >> > +  s-matyukevich has done a great job for baremetal examples for
> raspberry pi 3B,
> >> > +  and rhythm16 port all that code for raspberry pi 4B. Worth
> checking out.
> >> > +  https://s-matyukevich.github.io/raspberry-pi-os/
> >> > +  https://github.com/rhythm16/rpi4-bare-metal/
> >> > +
> >> > +  There are also some examples from valvers about bare metal for
> raspberrypi
> >> > +  family
> >> > +
> https://www.valvers.com/open-software/raspberry-pi/bare-metal-programming-in-c-part-1/
> >> > \ No newline at end of file
> >>
> > _______________________________________________
> > devel mailing list
> > devel at rtems.org
> > http://lists.rtems.org/mailman/listinfo/devel
>

-- 
Mohd Noor Aman
Tinkering with Hardware
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