Community discussion of the Gumstix embedded Linux platform.

hobbesc7 | 24 May 14:21

BT/WIFI Overo Fire power consumption

Is any reduction in power-consumption to be seen from shutting off just the
BT, and not the WIFI, since they are both on the same chip?

Jason

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david.moffatt | 24 May 05:51

How to make a ROM image.

Are there any instructions on how to create a ROM image rootfs file? I saw the wiki page http://www.gumstix.org/how-to/70-writing-images-to-flash.html I am unfamiliar with a .ubi and Googleing around did not enlighten me.

Also is there a way to pull a ubi image of the device and expand it out to a directory tree? The second question is not so important because I can always tar off the root file system to an SD card.

Thank for your help,

David Moffatt.

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norm.beyer | 23 May 21:11

On-chip NAND flash on Overo WaterStorm and IronStorm COMs

Currently, WaterStorm and IronStorm COMs come with on-chip package-on-package 512-Mbyte Micron ONFI-1.0 compliant NAND flash memory. As this may not always be the case in the future, will there be some generic method to allow identification of the type of on-chip flash going forward (i.e. programmatically)?

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g4@novadsp.com | 23 May 20:53

Power saving modes

I'm evaluating COM options for a complex system where power efficiency 
is crucial (existing Blackfin hardware wakes approximately 1 second in 30)

The Sakoman article on OMAP power management is an excellent exposition. 
It suggests that an Overo Water plus Thumbo consumes about 35mw in 
shutdown mode which makes it competitive with the Blackfin hardware.

Some questions arising are:

1. The Blackfin processors have a wake-up timer which will restore the 
processor from deep sleep. Is there a similar ability in 3530? I cannot 
make it out from the TI documentation.
2. What is the best off-the-shelf distribution for low power/power 
adjustment facilities. At this stage I'd prefer something I can work 
with rather than configure and build from scratch :)
3. If the system is powered down, does anyone know how quickly it can be 
restored? I'm assuming state is maintained in SDRAM in self-refresh mode 
... ?

Any help or further pointers greatly appreciated

Thx++

Jerry

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hobbesc7 | 23 May 20:01

Overo FE with all components rated for extended temperature

Is it possible to get an Overo FE with the microSD card slot and WIFI module
also rated for -40C -> 85C ?

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Harvey Chapman | 22 May 13:40

Re: Sync linux clock with GPS

On May 22, 2012, at 7:32 AM, Miner, Jonathan W (US SSA) wrote:

> 
>> I'm looking for a daemon which can synchronize the clock of the OS by using the nmea frames coming from a gps
module. Has someone ever done it?
> 
> ntpd will read nmea data from serial, but if you need the gps data for other applications, then use gpsd to
interface with the gps, and then setup ntpd to get the timing information from gpsd.  See
http://gpsd.berlios.de/gpsd.html and scroll down to the "USE WITH NTP" section.   A similar option would
be to use nmead (http://home.hiwaay.net/~taylorc/gps/nmea-server) ; although it seems that isn't
being actively maintained...
> 
> My only disclaimer is that I've never done this on a Gumstix, but its worked with various other Linux systems.

Thanks for the reminder. I was indeed using gpsd on a Verdex Pro with ntpd.

Harvey
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jean.gueganno | 22 May 09:53

Sync linux clock with GPS

Hi,

I'm looking for a daemon which can synchronize the clock of the OS by using the nmea frames coming from a gps
module. Has someone ever done it?

GPS device : U-Blok NEO6G
Overo card : fire and fire storm
OS : Angström

Regards,

Jean

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Jason C. Mecham | 22 May 01:46

Re: TI Multicore Part Status Change?

Yeah, I didn’t get that far till you scared me with the change bit of it. J

From my understanding the SOM vendors can continue making OMAP4 (and omap5+ parts in the future). I’m not worried about not being able to buy the actual OMAP part since as far as I can tell it would cost me more money to make the PCB than the SOM would cost.

Apparently there are three SOM vendors right now.

http://e2e.ti.com/support/omap/f/849/t/114128.aspx

From: Alan Miller [mailto:Alan.Miller <at> uniwest.com]
Sent: Monday, May 21, 2012 3:42 PM
To: 'General mailing list for gumstix users.'
Subject: Re: [Gumstix-users] TI Multicore Part Status Change?

Actually, I was using the OMAP4 as an example of what I heard TI wants to do with all its multicores. I planned on using the Gumstix with the DM3730 myself.

Thanks for the info Jason.

Alan

From: Jason C. Mecham [mailto:jason.mecham <at> amgmicro.com]
Sent: Monday, May 21, 2012 3:31 PM
To: General mailing list for gumstix users.
Subject: Re: [Gumstix-users] TI Multicore Part Status Change?

I wasn’t aware that TI even had any OMAP4 parts for small buyers. I expected them to release a hacked up version for the small/med buyers where they included a technical manual that incorrectly stated what was missing. They’d promise to fix it, but then the guy responsible would go on vacation for the next month.

The only low volume OMAP4460 solution that I know of is the Variscite OMAP4460 module, and hopefully Gumstix will have their own OMAP4460 offering (I like the gumstix when the space is constrained). I would advice asking Variscite about long term availability if you’re serious about the OMAP4460 part.

This does play a major role in my future decision. Right now I use an OMAP3730 part, but for a new product I’m trying to decide between an IMX6 versus an OMAP4460. Sure one is considerably faster than the other, but what I really care about is that the silicon works. In the case of the OMAP3730 I still haven’t seen the MUSB work properly, and the ISP interface gave me complete fits (it doesn’t resync the video at the next vsync if it gets an incorrect vsync/hsync). I also know that there is going to be quite a few COM manufactures of the IMX6, and I’ve only seen one COM vendor for the OMAP4.

From: Alan Miller [mailto:Alan.Miller <at> uniwest.com]
Sent: Monday, May 21, 2012 2:34 PM
To: gumstix-users <at> lists.sourceforge.net
Subject: [Gumstix-users] TI Multicore Part Status Change?

I have recently heard that TI is planning to change the status on all their multicore parts so only big quantity buyers can use them – like the OMAP4 status.

This is being done to eliminate tech support for small buyers.

I am designing around a DM3730 now and trying to get some kind of confirmation of this.

Has anyone heard of this change?

Alan Miller
Electrical Engineer
UniWest
122 South 4th Avenue
Pasco, WA 99301

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Jason C. Mecham | 22 May 00:31

Re: TI Multicore Part Status Change?

I wasn’t aware that TI even had any OMAP4 parts for small buyers. I expected them to release a hacked up version for the small/med buyers where they included a technical manual that incorrectly stated what was missing. They’d promise to fix it, but then the guy responsible would go on vacation for the next month.

The only low volume OMAP4460 solution that I know of is the Variscite OMAP4460 module, and hopefully Gumstix will have their own OMAP4460 offering (I like the gumstix when the space is constrained). I would advice asking Variscite about long term availability if you’re serious about the OMAP4460 part.

This does play a major role in my future decision. Right now I use an OMAP3730 part, but for a new product I’m trying to decide between an IMX6 versus an OMAP4460. Sure one is considerably faster than the other, but what I really care about is that the silicon works. In the case of the OMAP3730 I still haven’t seen the MUSB work properly, and the ISP interface gave me complete fits (it doesn’t resync the video at the next vsync if it gets an incorrect vsync/hsync). I also know that there is going to be quite a few COM manufactures of the IMX6, and I’ve only seen one COM vendor for the OMAP4.

From: Alan Miller [mailto:Alan.Miller <at> uniwest.com]
Sent: Monday, May 21, 2012 2:34 PM
To: gumstix-users <at> lists.sourceforge.net
Subject: [Gumstix-users] TI Multicore Part Status Change?

I have recently heard that TI is planning to change the status on all their multicore parts so only big quantity buyers can use them – like the OMAP4 status.

This is being done to eliminate tech support for small buyers.

I am designing around a DM3730 now and trying to get some kind of confirmation of this.

Has anyone heard of this change?

Alan Miller
Electrical Engineer
UniWest
122 South 4th Avenue
Pasco, WA 99301

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Andrew D Kirch | 22 May 00:08

Re: TI Multicore Part Status Change?

ask in #beagle on freenode, there's a couple TI employees there.

On 5/21/2012 5:33 PM, Alan Miller wrote:

I have recently heard that TI is planning to change the status on all their multicore parts so only big quantity buyers can use them – like the OMAP4 status.

This is being done to eliminate tech support for small buyers.

I am designing around a DM3730 now and trying to get some kind of confirmation of this.

Has anyone heard of this change?

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threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/

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Alan Miller | 21 May 23:33

TI Multicore Part Status Change?

I have recently heard that TI is planning to change the status on all their multicore parts so only big quantity buyers can use them – like the OMAP4 status.

This is being done to eliminate tech support for small buyers.

I am designing around a DM3730 now and trying to get some kind of confirmation of this.

Has anyone heard of this change?

Alan Miller
Electrical Engineer
UniWest
122 South 4th Avenue
Pasco, WA 99301

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will include endpoint security, mobile security and the latest in malware 
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