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by elektrknight
Sat May 10, 2014 2:38 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Transparent RS232 pipe
Replies: 5
Views: 1948

Re: Transparent RS232 pipe

Hi,

And one more: serialoverip - "Serial Over IP" http://sourceforge.net/projects/serialoverip/
Just found it so no idea how well it works.

Cheers,
elektrknight
by elektrknight
Sat May 10, 2014 2:35 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Transparent RS232 pipe
Replies: 5
Views: 1948

Re: Transparent RS232 pipe

Hi,

Serial port to network proxy aka ser2net http://sourceforge.net/projects/ser2net/
See this page "Raspberry Pi + ser2net = Cheap NM16A (Serial Console Server)" http://lesser-evil.com/2013/04/raspberr ... le-server/

Cheers,
elektrknight
by elektrknight
Tue Apr 22, 2014 9:52 pm
Forum: Compute Module
Topic: Raspberry Pi Compute Module or RASPICOM 3D model
Replies: 21
Views: 8260

Re: Raspberry Pi Compute Module or RASPICOM 3D model

@omenie
I was off the grid for couple of days and did not get to downloading the collada and texture from dropbox until today.
collada and 1024x1024 texture are here - https://www.dropbox.com/sh/6tu6bc5g7kg5e3y/GE08ENsh_D
Is it still available?
by elektrknight
Tue Apr 22, 2014 9:43 pm
Forum: Compute Module
Topic: Operating temperature range for compute module?
Replies: 10
Views: 54847

Re: Operating temperature range for compute module?

@tskwara
The overclocking article is quite informative especially the hard data on temperature rise.
Thanks for posting!
by elektrknight
Fri Apr 18, 2014 4:17 am
Forum: Compute Module
Topic: eMMC security
Replies: 5
Views: 3474

Re: eMMC security

With CM module acting as a mass storage device it would be trivial to access content of the eMMC. In this case the way to protect access to at least some part of the eMCC would be by using disk encryption. There is a performance penalty for using the encryption but it is possible to do it on a folde...
by elektrknight
Fri Apr 18, 2014 3:40 am
Forum: Compute Module
Topic: Operating temperature range for compute module?
Replies: 10
Views: 54847

Re: Operating temperature range for compute module?

However that is the max range for the silicon die – so a user would have to take into account the heat generated when in use and make sure this does not cause the temp. to exceed 80C." I recall that using "vcgencmd measure_temp" we can get the temperature from a on the die sensor(?). But beyond tha...
by elektrknight
Thu Apr 17, 2014 2:10 pm
Forum: Compute Module
Topic: Operating temperature range for compute module?
Replies: 10
Views: 54847

Re: Operating temperature range for compute module?

On the minimum temperature case: (I think I dimly remember someone reporting they'd tested a plain raspi after putting it in the freezer.) I don't know how people in the industry determine recommended limits - I'd guess experience. If your stuff is big enough to test it you get to take it above arc...
by elektrknight
Thu Apr 17, 2014 1:41 pm
Forum: Automation, sensing and robotics
Topic: Extreme Low-Cost 3D Printer
Replies: 10
Views: 7511

Re: Extreme Low-Cost 3D Printer

L298N - my advise is do not use them. They can be easily "killed" and the really cheap ones can even destroy RasPi GPIO. Get the 3 Stepsticks and either build or buy a GRBL shield . For an idea of DIY board see this: http://onehossshay.files.wordpress.com/2011/08/photo-3.jpg http://onehossshay.wordp...
by elektrknight
Thu Apr 17, 2014 4:56 am
Forum: Compute Module
Topic: Raspberry Pi Compute Module or RASPICOM 3D model
Replies: 21
Views: 8260

Re: Raspberry Pi Compute Module or RASPICOM 3D model

I do not know much about collada and .dae but this suggests that the texture might be from a file: <library_images> <image id="material0-diff-tex"> <init_from>file:///piModule-frontback.png</init_from> </image> </library_images> MIDI is 31250. Hence 3 1/2 full MIDI streams can be packed into 115200....
by elektrknight
Thu Apr 17, 2014 4:17 am
Forum: Compute Module
Topic: Powering the compute module
Replies: 17
Views: 10205

Re: Powering the compute module

To do a power budget for the design we need to know the worst case power consumption for the Compute Module only. I know what my custom base board is going to consume so the only unknown is the CM. Budgeting 200-250mA for the CM does not seem realistic as there are 3 active components on the CM : NC...
by elektrknight
Wed Apr 16, 2014 9:25 pm
Forum: Compute Module
Topic: Powering the compute module
Replies: 17
Views: 10205

Re: Powering the compute module

LDOs are fine as long as you take into account the max dropout, current requirements and power dissipation in each. Look at the Raspberry Pi Model A/B powerchain as an example. For the Model B the only rule I had was to use 5V/1A USB power supply. Is there any hard data/spec on power consumption (m...
by elektrknight
Wed Apr 16, 2014 2:51 pm
Forum: Compute Module
Topic: Powering the compute module
Replies: 17
Views: 10205

Re: Powering the compute module

and I can see the 3v3 could be achieved with the 1A - CJT1117-3.3 shame about the 1V8 guess its better to find something like the PAM2306, perhaps Seed would be interested in adding something compatible into the library! LDO for 1V8 or even 3V3 might not be the best option. On the other hand DC/DC ...
by elektrknight
Wed Apr 16, 2014 3:59 am
Forum: Other projects
Topic: Using 2 SPI devices and an SD card
Replies: 2
Views: 1720

Re: Using 2 SPI devices and an SD card

You could use GPIO to control all 3 devices, with LCD, touch and SD all running on the same SPI interface but the performance would be sloooooooooow. Even with just LCD (800x480 is a large for the SPI interface) do not expect to be able to show live video with it, not even close. See this page for p...
by elektrknight
Tue Apr 15, 2014 10:26 pm
Forum: Compute Module
Topic: Raspberry Pi Compute Module or RASPICOM 3D model
Replies: 21
Views: 8260

Re: Raspberry Pi Compute Module or RASPICOM 3D model

It's the Raspberry Pi Chamber Orchestra 'Player' - it's the thing that does synthesis. The 'Conductor' squirts MIDI to the Players, so they can synthesize. The 'Player' is nothing more than a MIDI interface to serial, and my latest even more cut down version of the RPCO eliminates MIDI from the equ...
by elektrknight
Mon Apr 14, 2014 7:37 pm
Forum: Compute Module
Topic: Raspberry Pi Compute Module or RASPICOM 3D model
Replies: 21
Views: 8260

Re: Raspberry Pi Compute Module or RASPICOM 3D model

omenie wrote:Adafruit's Flickr account has very high-res images, CC license.
Oh, great thanks for the link!
Any chance you could share your 3D model? I just need a decent resolution to prototype with it.
BTW, nice PCBs. What is the RPCO 'Player' PCB?
by elektrknight
Sat Apr 12, 2014 9:34 pm
Forum: Compute Module
Topic: Raspberry Pi Compute Module or RASPICOM 3D model
Replies: 21
Views: 8260

Re: Raspberry Pi Compute Module or RASPICOM 3D model

https://raw.githubusercontent.com/32bitmicro/Malinki/master/cad/MiniCluster.png First 3D model of the MiniCluster with 8 Compute Module nodes. This is an initial test of the OpenSCAD based modeling pipeline. FreeCAD 0.13 can open the MniCluster.off and MniCluster.stl files but hangs on MniCluster.c...
by elektrknight
Sat Apr 12, 2014 8:03 pm
Forum: Compute Module
Topic: Raspberry Pi Compute Module or RASPICOM 3D model
Replies: 21
Views: 8260

Re: Raspberry Pi Compute Module or RASPICOM 3D model

a) it's not complete b) it's natively a Mac Cheetah 3D file - if you're OK with waiting for a) - needs me to find another 20 minutes' free time - and b) then sure It's a DCC model, not a CAD model - it's not dimensioned in any meaningful way, it's purely for rendering / look and feel stuff. Never h...
by elektrknight
Sat Apr 12, 2014 7:55 pm
Forum: Compute Module
Topic: Raspberry Pi Compute Module or RASPICOM 3D model
Replies: 21
Views: 8260

Re: Raspberry Pi Compute Module or RASPICOM 3D model

This looks way too real down to break-out-tabs!
Nice spin on the compute module in software defined reality, now if only we could get the real thing :-)
by elektrknight
Sat Apr 12, 2014 7:46 pm
Forum: Compute Module
Topic: eMMC flashing
Replies: 6
Views: 3630

Re: eMMC flashing

cleverca22 wrote: https://github.com/raspberrypi/tools/bl ... oot/main.c

that will push a mass-storage driver over the usb bootloader
I presume these 2 files are just binary blobs with no source available?

usbbootcode.bin
msd.bin
by elektrknight
Sat Apr 12, 2014 2:29 pm
Forum: Compute Module
Topic: Raspberry Pi Compute Module or RASPICOM 3D model
Replies: 21
Views: 8260

Re: Raspberry Pi Compute Module or RASPICOM 3D model

omenie wrote:Here's a 3D compute module I knocked up last night - will need one to illustrate a talk sooner or later, so built one -
Nice! Can we have it?
by elektrknight
Sat Apr 12, 2014 2:21 pm
Forum: Compute Module
Topic: RFC: Malinki - Hardware Cluster with Switch Fabric for Raspi
Replies: 4
Views: 3355

Re: RFC: Malinki - Hardware Cluster with Switch Fabric for R

There's a ton of old tranny stuff online, some of it written by me over 25 years ago - try here - http://www.transputer.net/ibooks/72-trn-205-00/book.asp "The IMS C004 is a programmable link switch. It provides a full crossbar switch between 32 link inputs and 32 link outputs. " Serdes with switch ...
by elektrknight
Sat Apr 12, 2014 5:12 am
Forum: Compute Module
Topic: eMMC flashing
Replies: 6
Views: 3630

Re: eMMC flashing

Qouting from the schematic around U3 : BCM2835 will fail to boot from eMMC if EMMC_DISABLE_N is LOW and will therefore fall back to booting from USB. So pulling down EMMC_DISABLE_N will force it into USB boot, no microSD on the module. So you will need some kind of carrier board like RPI-CMIO with U...
by elektrknight
Sat Apr 12, 2014 1:58 am
Forum: Compute Module
Topic: Basic IO board for the CM
Replies: 25
Views: 16436

Re: Basic IO board for the CM

I wonder what would the limits be for a two-layers board? A four-layers pcb seems a little too much for me right now. If you need to use any of the differential signals: HDMI, CAM,DSI and even USB routing on 2 layers will be difficult. 2 layer carrier board with some GPIO (UART, I2C, SPI) should be...
by elektrknight
Sat Apr 12, 2014 1:50 am
Forum: Compute Module
Topic: Raspberry Pi Compute Module or RASPICOM 3D model
Replies: 21
Views: 8260

Re: Raspberry Pi Compute Module or RASPICOM 3D model

... and added OpenOffice spreadsheet with the Compute Module pinout

Image
https://github.com/32bitmicro/Malinki/r ... SPICOM.ods
by elektrknight
Fri Apr 11, 2014 7:51 pm
Forum: Compute Module
Topic: Raspberry Pi Compute Module or RASPICOM 3D model
Replies: 21
Views: 8260

Raspberry Pi Compute Module or RASPICOM 3D model

In an attempt to break out of the software defined reality I wanted to make 3D model of the Malinki cluster. But as it turns out more virtual items are needed, especially accurate model of the Raspberry Pi Compute Module aka RASPICOM. There is not much material available besides single image of the ...

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