Mity CPU Platforms » MitySOM-335x (ARM Cortex-A8 Based Products)

02/20/2013

MW 08:54 AM Software Development: RE: Where is the real spi_xfer() function located for MityArm in u-boot?

Cheat:
Look for .o files.
-Mike
Michael Williamson

08:53 AM Software Development: RE: Where is the real spi_xfer() function located for MityArm in u-boot?

Mike,
Thanks for the info. It is difficult to trace which files are included in the build using
the am335x_evm.h file's #defines.
-John Conover Anonymous

MW 08:36 AM Software Development: RE: Where is the real spi_xfer() function located for MityArm in u-boot?

John,
For the MityARM-335x family, the file is:
drivers/spi/omap3_spi.c
-Mike
Michael Williamson

MW 07:50 AM Software Development: RE: Typo in rs485_test code

Hi Ian,
It depends on the version of the compiler you are using and where it is getting it's kernel headers from.
The TI tools from their 05.03.02.00 SDK, what we used to run the test, have a definition of the their serial_rs485 st... Michael Williamson

02/19/2013

IM 07:03 PM Software Development: Typo in rs485_test code

Thank you for putting up the great resource at:
http://support.criticallink.com/redmine/projects/armc8-platforms/wiki/Driving_RS-485_transceivers
But there is a typo in rs485_test.tar. I believe "#define gpio_pin padding [1]" should... Ian Martin

02:06 PM Software Development: Where is the real spi_xfer() function located for MityArm in u-boot?

Hi
I've been unable to build u-boot on my Ubuntu 12.04 or 11.xx Virtual machines so I was wondering which u-boot file contains the spi_xfer() function that is compiled in the MityArm build of u-boot? I've searched looking at file... Anonymous

02/14/2013

11:06 AM Software Development: RE: Booting StarterWare image from NAND

Tim,
Now it makes sense. I never did get the u-boot to build so I did not know the process of making
the MLO. Now that you say it I remember seeing that command used to build an image with ECC. So if
we had made a plain MLO ... Anonymous

TI 10:56 AM Software Development: RE: Booting StarterWare image from NAND

John
My understanding (which may be confused!) is that it doesn't matter so much if you use SW or HW ECC, but that you flash the image using the same ECC mode that you use to read it. So if you are using HW ECC when you flash the image ... Tim Iskander

10:42 AM Software Development: RE: Booting StarterWare image from NAND

Hey Tim,
We have referenced that page before, the problem is that there is no mention of ECC being "Required" for any
MLO image past a certain revision to boot. As with a lot of TI documentation on the 3359, certain things ar... Anonymous

TI 10:30 AM Software Development: RE: Booting StarterWare image from NAND

John
check out http://processors.wiki.ti.com/index.php/AM335x_U-Boot_User's_Guide
cheers
/Tim Tim Iskander

10:07 AM Software Development: RE: Booting StarterWare image from NAND

Mike,
Here is our update. We have our board booting from NAND with no changes to the MLO image. We changed the SYSBOOT[9] to ECC
and our system boots with no issues. Is there any TI documentation/notes that would explain exactl... Anonymous

02/13/2013

09:25 AM Software Development: RE: Booting StarterWare image from NAND

Hey Mike,
Are jumper mode is 00100b so it is serial first, MMC and then NAND. Experimenting with your board we got your board to
boot from NAND but we had to remove the header from the MLO image (first 0x200 bytes.) We also ... Anonymous

02/12/2013

MW 05:42 PM Software Development: RE: Booting StarterWare image from NAND

Hi John,
Have you adjusted your boot-strap jumpers to select a mode the uses NAND? What option have you selected?
The "C"'s you are seeing is the ROM based boot code looking to be booted from the UART. This means (if the UART is ... Michael Williamson

05:05 PM Software Development: RE: Booting StarterWare image from NAND

Are we supposed to have a specific MLO for booting from NAND. We have seen it mentioned
that older versions would not boot in NAND, but we have pulled the latest. Do we
need a different one?
Thanks,
John Conover Anonymous

11:32 AM Software Development: RE: Booting StarterWare image from NAND

Just the "C"'s you see at the bottom of the serial log. Anonymous

JC 11:30 AM Software Development: RE: Booting StarterWare image from NAND

When you say it doesn't make it into MLO does anything get printed to the console after power up? Jonathan Cormier

11:26 AM Software Development: RE: Booting StarterWare image from NAND

Hey Tim,
I'm still having issues getting the system to boot from NAND. I've pulled
the latest MLO and uboot images from your site and run the commands below. This should
be the MLO and uboot images into NAND, but when we b... Anonymous

02/11/2013

12:38 PM Software Development: RE: Booting StarterWare image from NAND

Tim,
I'm in the process of putting our image into NAND and noticed that when I
save the ENV variables it prints out:
Environment size: 1704/65532 bytes
U-Boot# save
Saving Environment to NAND...
Erasing Nand...
Erasing at ... Anonymous

02/08/2013

MK 02:43 PM Software Development: RE: Critical Link Kernel integration w/ Angstrom/OpenEmbedded

Mike,
Thanks for the tip on checking the git commits. I was able to build the Angstrom console image.
Here is how I got there:
@rm -rf setup-scripts/sources/meta-mitydsp@
Changed layers.txt line to this:
@meta-mitydsp,git:/... Michael Karasoff

MK 11:43 AM Software Development: RE: Critical Link Kernel integration w/ Angstrom/OpenEmbedded

Mike,
Thanks much!
For what its worth, we aren't looking for long term support on this. If we can just get a working Angstrom baseline from CriticalLink, we can manage the layer internally moving forward.
Thanks again,
Michael Michael Karasoff

MW 11:23 AM Software Development: RE: Critical Link Kernel integration w/ Angstrom/OpenEmbedded

OK [edit] Michael [sorry]. The Git commit levels for all of the builds are included somewhere in the reference filesystems on our files download tab, as I recall. I don't have them handy at the moment, but yes, that should in theory wo... Michael Williamson

MK 11:19 AM Software Development: RE: Critical Link Kernel integration w/ Angstrom/OpenEmbedded

Mike,
Thanks for looking into this.
Could I solve my problems by referencing the commit where the Angstrom overlay worked in layers.txt?
RE TimeSys - we already have a prototype system and software up and running with Angstro... Michael Karasoff

MW 08:18 AM Software Development: RE: Critical Link Kernel integration w/ Angstrom/OpenEmbedded

Hi Mike,
I just did an update on the Angstrom git tree and I am getting this error as well. Something has changed on the Angstrom side since I last did the build and clearly there is a problem with our overlay. I will look into it.
... Michael Williamson

02/07/2013

MK 07:07 PM Software Development: RE: Critical Link Kernel integration w/ Angstrom/OpenEmbedded

Correction:
I ran the bitbake with additional debug *MACHINE=mityarm335x bitbake -v -D -D -D -D console-image*
I run @MACHINE=beaglebone bitbake -v -D -D -D -D console-image@ prior to adding the meta-mitydsp layer as a baseline. ... Michael Karasoff

MK 06:26 PM Software Development: RE: Critical Link Kernel integration w/ Angstrom/OpenEmbedded

Mike,
Thanks for your quick reply!
Unfortunately, when I run *MACHINE=mityarm335x bitbake console-image* I still get the errors during the Angstrom parse. I've replicated this on a fresh Ubuntu 12.04 install and on the 10.04 Virtu... Michael Karasoff

MW 06:52 AM Software Development: RE: Critical Link Kernel integration w/ Angstrom/OpenEmbedded

I was suggesting to build the mityarm335x machine, or else you won't pick up the u-Boot and Kernel from our git repository that has the needed mods to support the module. What I was suggesting is to build a standard filesystem image, su... Michael Williamson

03:20 PM Software Development: RE: Booting StarterWare image from NAND

Tim,
Yes we do have a plain u-boot from you. So if I understand this correctly the MLO, uboot and boot options
are already in NAND. So by putting our image into NAND (say at where the linix kernal would be) and then
modifying th... Anonymous

TI 03:10 PM Software Development: RE: Booting StarterWare image from NAND

John
booting from NAND is really just a change to your uboot environment settings. If you have a stock u-boot from Critical Link, you should see a number of different boot options.
booting from nand would be something like
nand read.i... Tim Iskander

02:48 PM Software Development: Booting StarterWare image from NAND

Hi,
We currently have our MityArm based system (MityArm CPU module, custom board)booting
into uboot and then loading out StarterWare based image from the sd card by setting the
bootcmd to:
mmc rescan; fatload mmc 0 80000000 emb... Anonymous

02/06/2013

MK 11:08 PM Software Development: RE: Critical Link Kernel integration w/ Angstrom/OpenEmbedded

I was able to recover my BeagleBone and BeagleBoard build environments by removing restoring the *EXTRALAYERS ?= ""* entry in conf/bblayers.conf. Yay! I suppose there is something in the MityArm layer that is causing this trouble.
... Michael Karasoff

MK 10:03 PM Software Development: RE: Critical Link Kernel integration w/ Angstrom/OpenEmbedded

Hello,
I am also trying to build Angstrom according to the tutorial on the wiki: http://support.criticallink.com/redmine/projects/armc8-platforms/wiki/Installing_Open_Embedded
I've been successful in the past building and Angstrom ... Michael Karasoff

01/27/2013

AS 04:40 PM PCB Development: RE: RGMII PHY Electrical Specification

MityArm (335x) SOM supports two RGMII interfaces and both interfaces support only 3.3V logic levels Alexei Shkurko

01/24/2013

JM 02:55 PM PCB Development: RGMII PHY Electrical Specification

What is the electrical specication of the RGMII interface from the MityDSP? Is it 3.3 or 2.5V LVCMOS? Joel Meltzer