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

10/18/2012

01:01 PM Software Development: RE: DMTimer running slowly for StarterWare

Hi Mike,
I'm hoping to find the PLL/init code in the Linux kernel. Can I ask you once I have the kernel tree,
is there a way to know which specific files apply to the MityARM? Is there some clue in the makefiles or
makerules t... Anonymous

MW 12:31 PM Software Development: RE: DMTimer running slowly for StarterWare

The source tree for the dev kit is available on a local git tree, see "this page":http://support.criticallink.com/redmine/projects/armc8-platforms/wiki/Linux_Kernel for details. There should be a link to the git server there.
The har... Michael Williamson

10:57 AM Software Development: DMTimer running slowly for StarterWare

Hi,
We are running the MityArm board under TI's StarterWare (we stop the u-boot process from loading the linux kernel) and are having issues
running the DMTimer code. The timer ISR is firing correctly but it is not frequent enou... Anonymous

10/12/2012

MW 11:10 AM PCB Development: RE: Recommended PHY for RGMII

Here is our source for the Vitesse part. We are checking on status of the part for obsolescence.
http://wpgnet.wpgam.com:8000/WPGWebsite/inventory.php?tPart=VSC8601&x=0&y=0
-Mike Michael Williamson

MK 08:49 AM PCB Development: RE: Recommended PHY for RGMII

I understand. Thanks Mike.
I will look into the use of MMC, there appears to be some advantages. On top of all this is we are waiting for a Windows version. Our current product is CE based. I have been in discussion with CL here and ... Mark Kraft

MW 08:33 AM PCB Development: RE: Recommended PHY for RGMII

We have / are considering I2C0, but it would be a functional change compared to our currently fielded modules as would tie up those addresses on I2C0 which may conflict with customer designs. It would also require a separate set of boot... Michael Williamson

MK 08:10 AM PCB Development: RE: Recommended PHY for RGMII

My design will use the MityArm3359 to replace a module recently obsoleted by another manufacturer. I have a limited time frame to prevent production interruption and so would like to minimize impact of hardware redesign and on software c... Mark Kraft

10/11/2012

MW 08:18 PM PCB Development: RE: Recommended PHY for RGMII

Hi Mark,
We just kitted a build for DevKits and were able to get the VSC8601 less than a week ago, however I do see that the parts are being discontinued at least on Digikey.
A quick search on Avnet indicates there are some Marvell... Michael Williamson

MK 04:55 PM PCB Development: Recommended PHY for RGMII

I have recently begun a design-in of the 3359 module to an existing product. I am at a point where I will address the ethernet interface. I see looking thru the forum that there is a limitation when selecting the PHY to be used with this... Mark Kraft

MK 11:10 AM PCB Development: RE: Evaluation kit schematic - as Design reference

Thanks Mark Kraft

MW 10:30 AM PCB Development: RE: Evaluation kit schematic - as Design reference

Did you find the schematics for the DevKit board? They are posted "here":http://support.criticallink.com/redmine/projects/am335x-devkit/wiki/Development_Kit_Revision_Information
-Mike Michael Williamson

MK 09:14 AM PCB Development: Evaluation kit schematic - as Design reference

Hi,
I have just begun implementing the 3359 module into an existing design, to replace another manufactures obsoleted module. I see in another post CL provided the schematic for the eval board. This will be helpful. The carrier design... Mark Kraft

10/04/2012

MW 09:11 AM Software Development: RE: Ethernet Interface to Micrel KSZ9021 PHY.

Hi Raja,
I don't think we've used this PHY with the MityARM-3359 here, but we have had problems strapping this device on other designs. The AM3359 has several pins pulled down (or up) after a power on reset. You should check Table 2... Michael Williamson

10/03/2012

RV 03:31 PM Software Development: Ethernet Interface to Micrel KSZ9021 PHY.

Hi,
We are using MityARM SOM and MICREL KSZ9021RNI gigabit as PHY on it for Ethernet Interface.
We have configured ETH_RXD0, ETH_RXD1, ETH_RXD2, ETH_RXD3, ETH_RXCTL as pullup high on PHY reset to get mode[3 -0] to 0xF (RGMII Mode – ... Raja Vankam

10/01/2012

AB 12:22 PM PCB Development: RE: Caution on MityARM SO-DIMM PCB Footprint

Mark,
Thank you for pointing out that lack of information. It has now been addressed and the design guide has been updated, October 1, 2012 1.2 version.
Thanks again,
Alex Alexander Block

MW 07:40 AM PCB Development: RE: Ethernet PHYs

Hi Mark,
I don't see a way around this at the moment. It does indeed look like you need to use the Gigabit Phy interface with the MityARM-3359 module.
Unfortunately, all of our initial use-cases involved Gigabit Ethernet requireme... Michael Williamson

09/30/2012

MW 05:34 PM PCB Development: RE: Ethernet PHYs

Hi Mark,
You are correct about the PR1_MII* signals, according to this E2E post, sorry about that.
http://e2e.ti.com/support/dsp/sitara_arm174_microprocessors/f/791/p/206939/733857.aspx
I am just looping back to this, so I can't... Michael Williamson

09/28/2012

11:57 AM PCB Development: RE: Ethernet PHYs

Hi Mike,
The interfaces we definitely need out of the 335x are a 16 bit GPMC (to FPGA), 1 Ethernet (10/100 is fine), 2 USBs, 2 UARTs and 1 SPI. I'd like to keep the 16 bit LCD interface available but could use those pins for other th... Anonymous

MW 09:35 AM PCB Development: RE: Ethernet PHYs

What other peripherals are you trying to accommodate? At a glance it looks like the pin outs should support RMII0 on the LCD_DATAXX pins, but if you need the LCD interface. Can you list what peripherals you need?
-Mike
Michael Williamson

08:49 AM PCB Development: Ethernet PHYs

Please correct me if I'm wrong, but it appears the pin-muxing configuration for the MityARM-335x SOM is forcing the use of an RGMII type interface for connecting up to Ethernet PHYs. For port 1, most of the interface pins are available ... Anonymous

08:26 AM PCB Development: Caution on MityARM SO-DIMM PCB Footprint

The PCB footprint found in section 6.5 of the MityARM-335x Carrier Board Design Guide can be misleading if you are not careful. This footprint (which is an exact copy of the footprint found on the JAE MM80-204B1-E1 data sheet) kind of i... Anonymous

09/26/2012

MW 10:10 AM PCB Development: RE: MityARM standard-keyed vs. reverse-keyed SO-DIMM connector

We have not tested such a configuration, so I don't really know. If the electrical connections honor the spec, then the only immediate concerns I would have include:
# Clearance. The top side has a couple of components that are tall... Michael Williamson

09/24/2012

AS 03:12 PM PCB Development: MityARM standard-keyed vs. reverse-keyed SO-DIMM connector

The MityARM design guide suggests an SO-DIMM connector with a standard keying. We have built our board with a reverse-key connector, is there any harm in installing the MityARM into a reverse-keyed connector with the OMAP facing downwar... Ali Asgar Sohanghpurwala

09/21/2012

10:11 AM Software Development: RE: MityARM-335x Ethernet Communication

Found the problem. The problem was related to the errata on the Vitesse VSC8601 Ethernet phy used on the development board. The phy violates some RGMII interface clock specs if the RX clock skew in the phy is set to 0 (which it is foll... Anonymous

09/20/2012

09:49 AM Software Development: MityARM-335x Ethernet Communication

I am trying to get the TI StarterWare Enet_Echo example to run on the MityARM-335x Development Kit. To accomplish this, I'm doing the following:
1. Use the the supplied SD card to boot the system and stay in u-boot (this initializes t... Anonymous