Re: [beagleboard] BBB: Using DMA with SPI

[Robert Nelson]

On Tue, May 15, 2018 at 1:45 PM, John B  wrote:
> Hi Robert,
>
> I am currently using the uboot_overlay_addrX scheme, and it seems the driver
> is always using PIO even for large SPI transfers (between 1024 and 3072
> bytes).  Under 3.8.13 I was using the Kernel overlay mechanism with success
> (DMA worked), but this past week I just switched to the more recent stuff
> that no longer supports the cape manager "slots" file, meaning, all overlays
> are in the uEnv.txt  (or part of the main DTB).  I'd rather not monkey with
> the main DTB, however, if that's the only way to get SPI+DMA then I guess
> I'll have to do that.  Do I need a newer kernel and/or u-boot?  version.sh
> output attached.

No you are seeing a different issue.. The DMA/SPI/Overlays would cause
a "hardlock" when trying to switch from pio mode to DMA.

In your case, your just seeing an un-optimized dma..

Any change with v4.14.x?

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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Re: [beagleboard] BBB: Using DMA with SPI

[John B]

Hi Robert,

I am currently using the uboot_overlay_addrX scheme, and it seems the 
driver is always using PIO even for large SPI transfers (between 1024 and 
3072 bytes).  Under 3.8.13 I was using the Kernel overlay mechanism with 
success (DMA worked), but this past week I just switched to the more recent 
stuff that no longer supports the cape manager "slots" file, meaning, all 
overlays are in the uEnv.txt  (or part of the main DTB).  I'd rather not 
monkey with the main DTB, however, if that's the only way to get SPI+DMA 
then I guess I'll have to do that.  Do I need a newer kernel and/or 
u-boot?  version.sh output attached.

Thanks
John



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root@beaglebone:~# /opt/scripts/tools/version.sh
git:/opt/scripts/:[e307a944e0be0610ff5296e0abe4ad31a6e70daa]
eeprom:[A335BNLT00C03917BBBK1E2F]
model:[TI_AM335x_BeagleBone_Black]
dogtag:[BeagleBoard.org Debian Image 2018-03-05]
bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot 
2018.01-2-ge9ff418fb8]:[location: dd MBR]
bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot 
2018.01-2-ge9ff418fb8]:[location: dd MBR]
kernel:[4.9.99-bone10]
nodejs:[v6.13.0]
uboot_overlay_options:[enable_uboot_overlays=1]
uboot_overlay_options:[uboot_overlay_addr4=/lib/firmware/BB-RGBSPI1-00A0.dtbo]
uboot_overlay_options:[disable_uboot_overlay_video=1]
uboot_overlay_options:[disable_uboot_overlay_audio=1]
uboot_overlay_options:[disable_uboot_overlay_wireless=1]
uboot_overlay_options:[disable_uboot_overlay_adc=1]
pkg:[bb-cape-overlays]:[4.4.20180305.0-0rcnee0~stretch+20180305]
pkg:[bb-wl18xx-firmware]:[1.20170829-0rcnee2~stretch+20180104]
pkg:[firmware-ti-connectivity]:[20170823-1rcnee0~stretch+20170830]
groups:[debian : debian adm kmem dialout cdrom floppy audio dip video plugdev 
users systemd-journal i2c bluetooth netdev cloud9ide gpio pwm eqep admin spi 
tisdk weston-launch xenomai]
cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 
root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 
quiet]
dmesg | grep pinctrl-single
[3.648452] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568
dmesg | grep gpio-of-helper
END

[beagleboard] Re: Are console images not available from beagleboard.org?

[Chris Green]

Graham  wrote:
> [-- multipart/alternative, encoding 7bit, 270 lines --]
> 
> [-- text/plain, encoding quoted-printable, charset: UTF-8, 138 lines --]
> 
> Well, they are weekly testing releases.
> 
> And, some of those weekly testing releases are chosen to become formal 
> releases.
> 
Yes.

> And if they had to chang anything in them, there would be a new/different  
> date/version on them.
> 
> So if you actually want the Console version corresponding to the formal 
> 'release' version, there it is.
> 
Er, where?  If the release version was marked/tagged somehow that
would be helpful but (as far as I can see) it isn't.

[snip]
> 
> As far as:
> >>> "4) Use apt remove on the released LXQT image to remove the "excess" 
> packages in the LXQT image until it's package list matches the package list 
> of the console image?"
> Yes, you can do it that way, but it sure sounds like the "hard way" to me.
> 
Very hard work IMHO, it's non-trivial to work out which packages to
remove and I'm pretty sure that there's a *lot* to remove too.

-- 
Chris Green
·

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Re: [beagleboard] BBB: Using DMA with SPI

[Robert Nelson]

On Tue, May 15, 2018 at 9:22 AM, John B  wrote:
> I am wondering if any progress has been made in getting Device Tree Overlays
> (via uBoot) to correctly allow DMA to be used on the SPI devices.  I have
> not seen any recent mention of this issue.  Referring to these previous
> articles:
>
> https://groups.google.com/forum/?fromgroups#!searchin/beagleboard/spi$20dma%7Csort:date/beagleboard/YV5qDHTgtBQ/MAI1s-PUAQAJ
>
> and
>
> https://groups.google.com/forum/?fromgroups#!searchin/beagleboard/spi$20dma%7Csort:date/beagleboard/_22bW7vMkW0/rn01nfvyBQAJ
>
> It is suggested that should you want to use DMA with SPI, enable the SPI in
> the main DTB (*sigh*).  Is this still the case?  If so, does it even make
> sense to use DT Overlays for any other resources I am using (GPIO's for
> example)?  Since I'm hacking up the main DTB anyway, why not just add
> everything I need there and not worry about the uBoot DT Overlays at all?
>
> Thanks so much for any insight anyone may have into this.

Yes this was fixed, by NOT using kernel overlays.. (race condition)

Use either a full DTB or u-boot Overlays..

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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[beagleboard] Re: Are console images not available from beagleboard.org?

[Graham]

Well, they are weekly testing releases.

And, some of those weekly testing releases are chosen to become formal 
releases.

And if they had to chang anything in them, there would be a new/different  
date/version on them.

So if you actually want the Console version corresponding to the formal 
'release' version, there it is.

If you want Gerald to change something about how releases are posted, you 
will have to take that up with Gerald directly.

I think he is deliberately restricting what he posts on the release page, 
so he limits the damage a newbie can do to their BBB to just the plug-in 
card, which is easily re-programmable.

As far as:
>>> "4) Use apt remove on the released LXQT image to remove the "excess" 
packages in the LXQT image until it's package list matches the package list 
of the console image?"
Yes, you can do it that way, but it sure sounds like the "hard way" to me.

--- Graham

==




On Monday, May 14, 2018 at 8:40:55 AM UTC-5, Jeff Andich wrote:
>
> I think we've wrestled with this issue as well.  We're still working with 
> Jessie console images from 
> https://rcn-ee.com/rootfs/bb.org/testing/2018-02-01/console/, and they 
> seem to be pretty stable, from the testing we've done to date.  
>
> I'm not yet sure and am still very curious about the test results/testing 
> status of the images which are placed in the testing folder. I THINK what 
> you need to do is look at the github revision/commit history for each 
> component (e.g. uboot, debian, and kernel version) in a given image) to see 
> why an image was updated (e.g. 2018-01-01 to 2018-02-10, but if there's a 
> place which posts what the test results are (and a place for users to post 
> their own experiences) for a given image, other than github, please let us 
> know!!
>
>
> Question(s):
>
> For a given LXQT image, how much effort is involved in converting that 
> "GUI" image to a console image?  Can't you just remove all of the "extra 
> packages" from the LXQT image until you have the desired console image per 
> the following procedure, or is it more involved than that?  Aren't the 
> pinmuxes the same?
>
>
> 1) Spit out the debian package list for  an existing console image (even 
> the weekly image).
> 2) Spit out the debian package list for the released LXQT image (from the 
> same desired major Debian revision as #1 (e.g. jessie, stretch)
> 3) Compare the package lists from 1,2.
> 4) Use apt remove on the released LXQT image to remove the "excess" 
> packages in the LXQT image until it's package list matches the package list 
> of the console image?
>
>
> Thanks!!
>
> Jeff
>
> On Monday, May 14, 2018 at 3:33:32 AM UTC-5, Chris Green wrote:
>>
>> Graham  wrote: 
>> > [-- multipart/alternative, encoding 7bit, 176 lines --] 
>> > 
>> > [-- text/plain, encoding quoted-printable, charset: UTF-8, 73 lines 
>> --] 
>> > 
>> > If what you want is the console version corresponding to 
>> >Debian 9.3 2018-01-28 4GB SD LXQT image 
>> > 
>> > And you go to 
>> > 
>> https://debian.beagleboard.org/images/rcn-ee.net/rootfs/bb.org/testing/2018-01-28/stretch-console/
>>  
>> > 
>> > it sure looks like Debian 9.3 to me. 
>> > 
>> > The one you want is: 
>> > bone-debian-9.3-console-armhf-2018-01-28-1gb.img.xz 
>> > 
>> > Now this one is for running from the uSD card. 
>> > If you want to turn it into a "flasher" you need to follow the 
>> instructions 
>> > about editing the correct uEnv.txt file 
>> > 
>> Yes, OK, that's a 9.3 console image but it's still only a weekly 
>> 'snapshot'. 
>>
>> I'm not personally desperately after an old[er] console image, I'm 
>> just saying that there isn't a 'recommended' default console image 
>> like there is for the IOT and full GUI images. 
>>
>> -- 
>> Chris Green 
>> · 
>>
>>

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[beagleboard] BBB: Using DMA with SPI

[John B]

I am wondering if any progress has been made in getting Device Tree 
Overlays (via uBoot) to correctly allow DMA to be used on the SPI devices.  
I have not seen any *recent* mention of this issue.  Referring to these 
previous articles:

https://groups.google.com/forum/?fromgroups#!searchin/beagleboard/spi$20dma%7Csort:date/beagleboard/YV5qDHTgtBQ/MAI1s-PUAQAJ

and

https://groups.google.com/forum/?fromgroups#!searchin/beagleboard/spi$20dma%7Csort:date/beagleboard/_22bW7vMkW0/rn01nfvyBQAJ

It is suggested that should you want to use DMA with SPI, enable the SPI in 
the main DTB (*sigh*).  Is this still the case?  If so, does it even make 
sense to use DT Overlays for any other resources I am using (GPIO's for 
example)?  Since I'm hacking up the main DTB anyway, why not just add 
everything I need there and not worry about the uBoot DT Overlays at all?

Thanks so much for any insight anyone may have into this.

Regards,
John

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Re: [beagleboard] Where are the hardware data / component placement list?

[Mike Maikaefer]

Thanks :-)

On Tue, May 15, 2018 at 1:50 PM, Gerald Coley 
wrote:

> I just looked, the XY data is in the zip file under the MFG
> (Manufacturing) directory.
>
>
>
> https://github.com/beagleboard/beaglebone-black/archive/master.zip
>
>
>
> Gerald
>
>
>
>
>
> *From:* beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com]
> *On Behalf Of *Gerald Coley
> *Sent:* Tuesday, May 15, 2018 6:47 AM
> *To:* beagleboard@googlegroups.com
> *Subject:* RE: [beagleboard] Where are the hardware data / component
> placement list?
>
>
>
> https://www.elinux.org/Beagleboard:Main_Page Main Wiki
>
>
>
> https://www.elinux.org/Beagleboard:BeagleBoneBlack BeagleBone Black
> Section
>
>
>
> https://www.elinux.org/Beagleboard:BeagleBoneBlack#
> LATEST_PRODUCTION_FILES_.28C.29 Latest Production Files
>
>
>
>
>
> Gerald
>
>
>
> *From:* beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com
> ] *On Behalf Of *Mike Maikaefer
> *Sent:* Tuesday, May 15, 2018 6:30 AM
> *To:* beagleboard@googlegroups.com
> *Subject:* Re: [beagleboard] Where are the hardware data / component
> placement list?
>
>
>
> Hi Gerald,
>
>
>
> thanks for the feedback. Where can one download the Altium version? I only
> found the one with the Gerber-files...
>
>
>
> Cheers
>
>
>
> Mike
>
>
>
>
>
> On Tue, May 15, 2018 at 1:27 PM, Gerald Coley 
> wrote:
>
> You can get that out of the Allegro file that is provided aling with all
> of that. I do not recall if we ever provided that as a separate file or
> not.
>
>
>
> You should be able to get that also out of the Altium version as well.
>
>
>
> On Tue, May 15, 2018, 2:13 AM  wrote:
>
> Hi,
>
>
>
> I wonder if the complete hardware data for the BBB are available
> somewhere: I found some Gerber files defining the PCB, a BOM defining the
> used components but I did not found a CPL that describes which component
> has to be placed at which position.
>
>
>
> So...aren't these data open and available for free?
>
>
>
> Thanks!
>
>
>
> Mike
>
>
>
>
>
> --
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RE: [beagleboard] Where are the hardware data / component placement list?

[Gerald Coley]

I just looked, the XY data is in the zip file under the MFG (Manufacturing) 
directory.

https://github.com/beagleboard/beaglebone-black/archive/master.zip

Gerald


From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On 
Behalf Of Gerald Coley
Sent: Tuesday, May 15, 2018 6:47 AM
To: beagleboard@googlegroups.com
Subject: RE: [beagleboard] Where are the hardware data / component placement 
list?

https://www.elinux.org/Beagleboard:Main_Page Main Wiki

https://www.elinux.org/Beagleboard:BeagleBoneBlack BeagleBone Black Section

https://www.elinux.org/Beagleboard:BeagleBoneBlack#LATEST_PRODUCTION_FILES_.28C.29
 Latest Production Files


Gerald

From: beagleboard@googlegroups.com 
[mailto:beagleboard@googlegroups.com] On Behalf Of Mike Maikaefer
Sent: Tuesday, May 15, 2018 6:30 AM
To: beagleboard@googlegroups.com
Subject: Re: [beagleboard] Where are the hardware data / component placement 
list?

Hi Gerald,

thanks for the feedback. Where can one download the Altium version? I only 
found the one with the Gerber-files...

Cheers

Mike


On Tue, May 15, 2018 at 1:27 PM, Gerald Coley 
mailto:ger...@beagleboard.org>> wrote:
You can get that out of the Allegro file that is provided aling with all of 
that. I do not recall if we ever provided that as a separate file or not.

You should be able to get that also out of the Altium version as well.

On Tue, May 15, 2018, 2:13 AM 
mailto:mike.maikae...@gmail.com>> wrote:
Hi,

I wonder if the complete hardware data for the BBB are available somewhere: I 
found some Gerber files defining the PCB, a BOM defining the used components 
but I did not found a CPL that describes which component has to be placed at 
which position.

So...aren't these data open and available for free?

Thanks!

Mike


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RE: [beagleboard] Where are the hardware data / component placement list?

[Gerald Coley]

https://www.elinux.org/Beagleboard:Main_Page Main Wiki

https://www.elinux.org/Beagleboard:BeagleBoneBlack BeagleBone Black Section

https://www.elinux.org/Beagleboard:BeagleBoneBlack#LATEST_PRODUCTION_FILES_.28C.29
 Latest Production Files


Gerald

From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On 
Behalf Of Mike Maikaefer
Sent: Tuesday, May 15, 2018 6:30 AM
To: beagleboard@googlegroups.com
Subject: Re: [beagleboard] Where are the hardware data / component placement 
list?

Hi Gerald,

thanks for the feedback. Where can one download the Altium version? I only 
found the one with the Gerber-files...

Cheers

Mike


On Tue, May 15, 2018 at 1:27 PM, Gerald Coley 
mailto:ger...@beagleboard.org>> wrote:
You can get that out of the Allegro file that is provided aling with all of 
that. I do not recall if we ever provided that as a separate file or not.

You should be able to get that also out of the Altium version as well.

On Tue, May 15, 2018, 2:13 AM 
mailto:mike.maikae...@gmail.com>> wrote:
Hi,

I wonder if the complete hardware data for the BBB are available somewhere: I 
found some Gerber files defining the PCB, a BOM defining the used components 
but I did not found a CPL that describes which component has to be placed at 
which position.

So...aren't these data open and available for free?

Thanks!

Mike


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Re: [beagleboard] Where are the hardware data / component placement list?

[Mike Maikaefer]

Hi Gerald,

thanks for the feedback. Where can one download the Altium version? I only
found the one with the Gerber-files...

Cheers

Mike


On Tue, May 15, 2018 at 1:27 PM, Gerald Coley 
wrote:

> You can get that out of the Allegro file that is provided aling with all
> of that. I do not recall if we ever provided that as a separate file or
> not.
>
> You should be able to get that also out of the Altium version as well.
>
> On Tue, May 15, 2018, 2:13 AM  wrote:
>
>> Hi,
>>
>> I wonder if the complete hardware data for the BBB are available
>> somewhere: I found some Gerber files defining the PCB, a BOM defining the
>> used components but I did not found a CPL that describes which component
>> has to be placed at which position.
>>
>> So...aren't these data open and available for free?
>>
>> Thanks!
>>
>> Mike
>>
>>
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Re: [beagleboard] Where are the hardware data / component placement list?

[Gerald Coley]

You can get that out of the Allegro file that is provided aling with all of
that. I do not recall if we ever provided that as a separate file or not.

You should be able to get that also out of the Altium version as well.

On Tue, May 15, 2018, 2:13 AM  wrote:

> Hi,
>
> I wonder if the complete hardware data for the BBB are available
> somewhere: I found some Gerber files defining the PCB, a BOM defining the
> used components but I did not found a CPL that describes which component
> has to be placed at which position.
>
> So...aren't these data open and available for free?
>
> Thanks!
>
> Mike
>
>
> --
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[beagleboard] Where are the hardware data / component placement list?

[mike . maikaefer]

Hi,

I wonder if the complete hardware data for the BBB are available somewhere: 
I found some Gerber files defining the PCB, a BOM defining the used 
components but I did not found a CPL that describes which component has to 
be placed at which position.

So...aren't these data open and available for free?

Thanks!

Mike


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