Go to advanced search

by arm2
Sat Jun 28, 2014 9:07 pm
Forum: General discussion
Topic: More obvious Link to sources please.
Replies: 3
Views: 706

More obvious Link to sources please.

Sorry if I've missed it but I couldn't find a link to the sources from the Downloads, Help or Resources pages. I think it would be useful to have on the downloads page a link to github and in particular to start.elf . Many forum posts suggest updating to the latest! https://github.com/raspberrypi/fi...
by arm2
Thu Jun 26, 2014 8:09 pm
Forum: Compute Module
Topic: It's here, it's real, it works
Replies: 15
Views: 2976

Re: It's here, it's real, it works

Got it working now thanks. Re-downloaded Raspian for the host Pi and as an .img file to write to the eMMC. Also used a different Pi & SD card. n.b. I think the DDong took about 15-20 minutes. That is a long time without any feedback especially as Jamesh wrote: "it's easy to install - takes a couple ...
by arm2
Wed Jun 25, 2014 5:35 pm
Forum: Compute Module
Topic: It's here, it's real, it works
Replies: 15
Views: 2976

Re: It's here, it's real, it works

You need to DD the image to the 'raw' device. /dev/sdb in this case. /dev/sdb1 (and 2) are partitions. So: sudo dd if=2014-06-20-wheezy-raspbian.img of=/dev/sdb bs=8M and off you go. However, if you're seeing partitions then it suggests it's been flashed before... And seeing /dev/sdb makes it seem ...
by arm2
Wed Jun 25, 2014 4:20 pm
Forum: Compute Module
Topic: It's here, it's real, it works
Replies: 15
Views: 2976

Re: It's here, it's real, it works

I wonder if you're accidentally mixing up your device and partition names? The device names will be like /dev/sda or /dev/sdb and the partition names (i.e. the partitions on each device) will be like /dev/sda1 & /dev/sda2 or /dev/sdb1 & /dev/sdb2. Obviously trying to write a file intended to be wri...
by arm2
Wed Jun 25, 2014 1:53 pm
Forum: Compute Module
Topic: It's here, it's real, it works
Replies: 15
Views: 2976

Re: It's here, it's real, it works

Can you give more info? What host did you use (a Pi?). What OS were you trying to flash? Did you follow the instructions exactly (including the sudo in front of everything)? We used a Model B Pi Latest Raspian image. I'm pretty sure we did exactly as instruction at least once. Last two attempts we ...
by arm2
Wed Jun 25, 2014 8:52 am
Forum: Compute Module
Topic: I2C GPIO
Replies: 8
Views: 2782

Re: I2C GPIO

Re SDA & SCL "You'll also need to fit pull-ups somewhere." I've always understood that BCM2835 has internal pull ups. There are many standard Pi boards that don't have pull ups.
by arm2
Tue Jun 24, 2014 4:08 pm
Forum: Compute Module
Topic: It's here, it's real, it works
Replies: 15
Views: 2976

Re: It's here, it's real, it works

We got as far as lsblk showing it then tried DD ing the image across. 1st time seemed quite quick, we were returned to the prompt then moved J4 and powercycled to a blank screen. 2nd DD after waiting over half an hour with nothing seemingly happened. Couldn't CTRL C or Escape. so turned CM off at wh...
by arm2
Fri May 23, 2014 10:26 am
Forum: Compute Module
Topic: About the jtag
Replies: 9
Views: 3153

Re: About the jtag

I think it may be worth mentioning that your access to the JTAG is not as a Foundation volunteer but as part of your day job at Broadcom. Otherwise people might grumble at the Foundation for not making it available to users. Or have I got it wrong?
by arm2
Thu May 08, 2014 8:51 pm
Forum: Compute Module
Topic: Additional SD card slot
Replies: 19
Views: 8028

Re: Additional SD card slot

GSH: I'm confused.
Is there a second SD bus on CM 200pin connector?
Are you saying the second SD bus is non standard?
What is "not simple" about it?
Or am I misunderstanding something?
by arm2
Wed May 07, 2014 9:35 pm
Forum: Compute Module
Topic: Additional SD card slot
Replies: 19
Views: 8028

Re: Additional SD card slot

Hi Gert. Why slower?
Even another eMMC chip was used?
I believe even Class 10 SD cards will be slower than eMMC.
I'm guessing the extra connection or track length may have something to do with it
by arm2
Wed Apr 23, 2014 9:10 pm
Forum: Compute Module
Topic: Female Headers for the IO Board
Replies: 46
Views: 9706

Re: Female Headers for the IO Board

One big problem with a Female Header is that IDC males connectors are silly money i.e. about ten times the price of IDC females!
Female header only works well if you are plugging your board directly in (pins soldered to your board) or you are using individual breadboard jumper wires.
by arm2
Mon Apr 21, 2014 8:26 pm
Forum: Compute Module
Topic: What would you do with a Compute Module?
Replies: 50
Views: 11839

Re: What would you do with a Compute Module?

"...design a CM I/O board..." CM = Command module / Championship Manager / ?
Gaming isn't my thing, does it show?
by arm2
Mon Apr 14, 2014 9:46 pm
Forum: Advanced users
Topic: Understanding github tweets by @RPF_Dev_Updates
Replies: 4
Views: 1024

Re: Understanding github tweets by @RPF_Dev_Updates

It's now got even worse. Every time there is a bunch (100 odd) patches committed there is whole load of Pi specfic patches that seem to be recommits e.g. "popcornmix - Add Chris Boot's i2c and spi drivers." is included each time. In fact it (and all? the other Pi specfic patches) were tweeted twice ...
by arm2
Sun Apr 13, 2014 9:12 pm
Forum: Compute Module
Topic: Raspberry Pi Compute Module or RASPICOM 3D model
Replies: 22
Views: 8508

Re: Raspberry Pi Compute Module or RASPICOM 3D model

Hi omenie
you seem to have an image of the reverse of the SODIMM is that based on a photo you seen or what?
If a photo, is it online somewhere?
I've not seen one.
by arm2
Sat Apr 12, 2014 9:25 pm
Forum: Compute Module
Topic: Basic IO board for the CM
Replies: 25
Views: 16837

Re: Basic IO board for the CM

Would: http://www.rs-online.com/designspark/el ... -libraries
allow me to use the eagle .sch and .brd files that ceteras has produced?
Thanks ceteras.
by arm2
Fri Feb 14, 2014 5:10 pm
Forum: Advanced users
Topic: Understanding github tweets by @RPF_Dev_Updates
Replies: 4
Views: 1024

Re: Understanding github tweets by @RPF_Dev_Updates

Thanks for the explanation jdb. It's only been happening for about a week, I hope they can stop it.
by arm2
Tue Feb 11, 2014 12:27 pm
Forum: Advanced users
Topic: Understanding github tweets by @RPF_Dev_Updates
Replies: 4
Views: 1024

Understanding github tweets by @RPF_Dev_Updates

I can normally understand the relevance of most github additions as tweeted by @RPF_Dev_Updates but recently there have been a large number that don't seem relevant to raspberry pi builds: e.g. https://github.com/raspberrypi/linux/commit/fbd50fc43507d112a07b9a93297ce2a7d5a6fa2b https://github.com/ra...
by arm2
Mon Oct 28, 2013 9:36 pm
Forum: Advanced users
Topic: RPi, camera module, 7 inch screen
Replies: 5
Views: 1506

Re: RPi, camera module, 7 inch screen

"you can't really program a tft screen that is larger than 3.2" Advert mode ON: 7" PAL LCD http://www.cjemicros.co.uk/micros/individual/newprodpages/prodinfo.php?prodcode=RPI-7INWLCD 7" HDMI 800x480 LCD Panel http://www.cjemicros.co.uk/micros/individual/newprodpages/prodinfo.php?prodcode=VAR-7INWLCD...
by arm2
Mon Oct 28, 2013 5:09 pm
Forum: Advanced users
Topic: hdmi_mode=84 2048x1152 reduced blanking
Replies: 0
Views: 1295

hdmi_mode=84 2048x1152 reduced blanking

I've used 1920x1200 & 1200x1920 (I like portrait monitors!) fine. I've seen Dom & Eben post that the maximum resolution is 1920x1200 but... We’ve just received a nice 2048 × 1152 monitor which is only 2.4% more pixels and the wiki does list it as supported hdmi_mode=84 2048x1152 reduced blanking So ...
by arm2
Wed Oct 23, 2013 1:35 pm
Forum: Advanced users
Topic: STICKY: HOWTO: Create Custom HDMI modes
Replies: 214
Views: 368749

Re: Custom HDMI modes 2048x1152!

I've used 1920x1200 & 1200x1920 (I like portrait monitors!) fine. I've seen Dom & Eben post that the maximum resolution is 1920x1200 but... We’ve just received a nice 2048 × 1152 monitor which only 2.4% more pixels and the wiki does list it as hdmi_mode=84 2048x1152 reduced blanking So I've tried it...
by arm2
Wed Oct 09, 2013 9:35 am
Forum: Other projects
Topic: Simple Pi Rack
Replies: 24
Views: 119884

Re: Simple Pi Rack

Another powering option is using a PSU with a standard 2.1mm DC connector.
We do adaptor cables and splitter:

http://www.cjemicros.co.uk/products/VAR-2_1MUSB
http://www.cjemicros.co.uk/products/VAR-2_1-4X2_1ADAPT

Chris
by arm2
Tue Jul 02, 2013 3:37 pm
Forum: Troubleshooting
Topic: USB redux
Replies: 514
Views: 203567

Re: USB redux

Thanks for the reply Gordon. Yes we have been unplugging and replugging the keyboard. That is the same 'fix' we used to use on another ARM based system (a9home).
by arm2
Tue Jul 02, 2013 10:52 am
Forum: Troubleshooting
Topic: USB redux
Replies: 514
Views: 203567

Re: USB redux

How much if any of the USB code is in start.elf?
I didn't think any! But here we are using RISC OS and using a start.elf from last week we now get much fewer 'repeating keys'
AIUI the low level USB drivers for RISC OS are based on the debian versions and haven't been update to the FIQ version yet.
by arm2
Fri Jun 28, 2013 4:50 pm
Forum: Troubleshooting
Topic: Request for change to hdmi_drive =1 to force analogue sound
Replies: 3
Views: 2186

Re: Request for change to hdmi_drive =1 to force analogue s

Brilliant. That has fixed it for the first two configurations we tried.
How recent a version of start.elf is needed?
Some of the users who need this fix will be on very old versions.

Thanks for the very quick and effective reply.
by arm2
Fri Jun 28, 2013 3:44 pm
Forum: Troubleshooting
Topic: Request for change to hdmi_drive =1 to force analogue sound
Replies: 3
Views: 2186

Request for change to hdmi_drive =1 to force analogue sound

Request for change to hdmi_drive =1 to force analogue sound! We have tried various DVI monitors, HDMI monitors and HDMI to VGA adaptors that have no sound but unfortunately seem to fool the Pi into using HDMI sound. According to the wiki hdmi_drive chooses between HDMI and DVI modes hdmi_drive=1 Nor...

Go to advanced search