---------- Forwarded message ---------- From: Shane Morris <edgecomberts@gmail.com> Date: Thu, Apr 10, 2014 at 7:37 AM Subject: Re: [App_rpt-users] RaspberryPi Compute Module To: Matthew Pitts <n8ohu@yahoo.com> My guess is they want to go "deeply embedded" with this product - stuff like washing machines, and cars, its not a computer, not on the outside, but it has a computer in it, and a simple user interface on the outside. Usually deeply embedded means you don't have ethernet, but of course, you could design that into a custom I/O board. In any case, its interesting to me, and I thought I'd highlight it to the list, even if you can't use it for app_rpt applications, at the risk of being OT, its good for other projects. Thanks again! On Thu, Apr 10, 2014 at 7:30 AM, Matthew Pitts <n8ohu@yahoo.com> wrote:
Same Broadcom SoC, yes, but with a 4 GB eMMC module like a Beaglebone Black (or BeagleBone with the memory interface cape); the I/O board only provides the same basic capabilities as the Model A, rather than the features we are used to from the Model B. The Raspberry Pi Foundation included basic schematics for both boards, and it appears that we can design whatever sort of I/O board we want and the Compute Module with pre-installed OS just plugs into it.
Matthew Pitts N8OHU
------------------------------ *From:* Shane Morris <edgecomberts@gmail.com> *To:* Doug Crompton <doug@crompton.com> *Cc:* "app_rpt-users@ohnosec.org" <app_rpt-users@ohnosec.org> *Sent:* Tuesday, April 8, 2014 11:29 PM *Subject:* Re: [App_rpt-users] RaspberryPi Compute Module
From what I understand, its the exact same specs, just a much more embeddable form factor for integrating into devices. You will also note there is no ethernet port by the looks of things. That could be a limiting factor in a few cases.
Thanks!
Sent from my iPad
On 9 Apr 2014, at 1:04 pm, Doug Crompton <doug@crompton.com> wrote:
Interesting but I don't think it will differ much in performance from the stock RPi just flexibility. The problem is the USB on the RPi and to some extent also on the BBB but I think the real problem is the app_rpt SW. Many other applications using the same resources and bandwidths are running on these platforms using USB without the problems I am seeing with app_rpt. App_rpt is old code and in many ways outdated at least in the the IO area. Unless someone does a fairly extensive rewrite of the code I don't think it is going to happen on the Arm processors. There are periodic dropouts using USB (not associated with radio relax) even on PC processors it is just much more pronounced on the arm processors.
When you run an Asterisk PBX on a RPi or BBB the CPU load is nil even when active. As soon as you introduce app_rpt even without radios (pseudo connections) or activity you see 20-30% CPU utilization. While the CPU utilization is not the main problem it sure does not help on a small system.
I intend to keep plugging away at this but my expectations have been lessened. I am thinking of the possibility of an external USB interface, like Thelinkbox interfaced to asterisk might be a temporary fix. It apparently works well with USB on the ARM. This would also be an inexpensive way to connect remote radios to a server.
If anyone has any ideas on this I would like to hear from you. There are several who have contacted me and perhaps we can form a group working towards a common goal.
*73 DougWA3DSP http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
------------------------------ Date: Wed, 9 Apr 2014 07:42:25 +1000 From: edgecomberts@gmail.com To: app_rpt-users@ohnosec.org Subject: [App_rpt-users] RaspberryPi Compute Module
Hi list,
Don't know if you had seen this:
http://www.raspberrypi.org/raspberry-pi-compute-module-new-product/
A RaspberryPi with 4GB eMMC in the size of a DDR2-SODIMM. Initial deliveries will be made with the I/O Board, later they will deliver the Compute Module in single quantities.
There is a hard real time Xenomai Linux for RaspberryPi now, it is used with LinuxCNC. Add to this the fact that the GPU was finally open sourced, and if it weren't for that woeful USB performance, it'd be an alright machine.
Doug, you may find this interesting, but as you have mentioned, you have been making better progress with the BeagleBone Black.
Thanks!
Shane.
_______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users To unsubscribe from this list please visit http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button" You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem.
_______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
To unsubscribe from this list please visit http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button" You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem.