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by jecxjo
Sun Jun 17, 2012 3:33 pm
Forum: HATs and other add-ons
Topic: USB to wireless wifi Internet adapter
Replies: 5
Views: 16123

Re: USB to wireless wifi Internet adapter

Here is the community list of tested Wifi adapters. Should be able to check whatever sites you usually buy hardware from with this info.

http://elinux.org/RPi_VerifiedPeriphera ... i_Adapters
by jecxjo
Sun Jun 17, 2012 3:27 pm
Forum: Beginners
Topic: Memory
Replies: 1
Views: 610

Re: Memory

There is only one SD card slot on the Pi. You only need one as your can partition the card into the setup you want. By default there will be a small Fat32 partition which contains the bootloader and kernel and then a ext4 (this is the Arch setup) which contains the userland space for a total of 2GB....
by jecxjo
Sun Jun 17, 2012 3:04 pm
Forum: Beginners
Topic: Setting up VPN on Pi
Replies: 6
Views: 3437

Re: Setting up VPN on Pi

I'm running Arch and went through the install for PPTP via the directions here https://wiki.archlinux.org/index.php/PPTP_Server It will work pretty good as long as you don't have a ton of connections. Remember all traffic is going through a single ethernet via USB multiple clients will slow things d...
by jecxjo
Sat Jun 16, 2012 9:58 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Some advice please.
Replies: 14
Views: 4650

Re: Some advice please.

So how much I/O do you plan on having the Pi record and how are you getting it? I'm just wondering if using the UART creating a multi-point serial network connected to micro controllers would make more sense. A complete power/steering system managed by a small micro controller could then communicate...
by jecxjo
Sat Jun 16, 2012 3:59 pm
Forum: Other projects
Topic: Another LEGO Case
Replies: 6
Views: 2741

Re: Another LEGO Case

Xbee are Point-to-Point and Point-to-MultiPoint serial radios. Some models of these radios (ones with ZigBee Protocol) have the ability to produce a Mesh Network allowing a wider distance between two points by hopping traffic along multiple radios from source to destination. I've used this for proje...
by jecxjo
Fri Jun 15, 2012 4:11 pm
Forum: Beginners
Topic: Changing root name on Pi
Replies: 30
Views: 5640

Re: Changing root name on Pi

I agree with AndrewS, this is not a good idea. There are ways to get around your issue (setuid, password-less sudo, etc) but they all open you up to major security problems. With the Pi being so popular, the DDoS attack yesterday, you know crackers will be scanning the web to find these devices to a...
by jecxjo
Fri Jun 15, 2012 3:20 pm
Forum: General programming discussion
Topic: Crosscompiling for RaspPi - Explained
Replies: 25
Views: 32337

Re: Crosscompiling for RaspPi - Explained

there is another way that is pretty simple. scratchbox2 http://maemo.gitorious.org/scratchbox2 (and if you really want to sbrsh although it does complicate things a little). scratchbox2 is pretty much idiot-proof and to prove it i've been using it almost exclusively for several years (plus aborigin...
by jecxjo
Fri Jun 15, 2012 2:36 pm
Forum: Beginners
Topic: Offline installing programs.
Replies: 14
Views: 22030

Re: Offline installing programs.

Depending on your distro you can install via local package files. Remember that it is now up to you to find all of the dependencies. I'm in a meeting, hopefully someone can post URLs to the repo sites so you can download manualy.

Debian

Code: Select all

dpkg -i foo-1.0.deb
Arch

Code: Select all

pacman -U foo-1.0.tar.xz
by jecxjo
Fri Jun 15, 2012 5:13 am
Forum: Beginners
Topic: Changing root name on Pi
Replies: 30
Views: 5640

Re: Changing root name on Pi

Thank you for all of your replies, they have been extremely helpful! Since its asking for my password now to access it, and if I enter my password, which now does work. How can I stop this from happening? I assume you are asking how to sudo without a password you can do something like this: %wheel ...
by jecxjo
Fri Jun 15, 2012 3:43 am
Forum: Advanced users
Topic: u-boot image?
Replies: 14
Views: 7739

Re: u-boot image?

There is some USB stack support for uBoot: http://git.denx.de/?p=u-boot/u-boot-usb.git;a=summary No idea if it is supports a flavor compatible with the Raspberry though. Even includes a smsc95xx.c at: http://git.denx.de/?p=u-boot/u-boot-usb.git;a=tree;f=drivers/usb/eth So there may even be network ...
by jecxjo
Thu Jun 14, 2012 4:31 pm
Forum: Python
Topic: GPIO confusion
Replies: 22
Views: 8627

Re: GPIO confusion

After stepping away from this thread for a few days I think I'm a bit lost as to why people are having difficulty calling GPIO pins....GPIO pins? The convention is to reference the purpose of the pin (GPIO 0 or , UART0_RTS, etc) and the reason being is that this way you and others know why you are i...
by jecxjo
Thu Jun 14, 2012 1:57 pm
Forum: C/C++
Topic: - Help - Programming a simple OS
Replies: 28
Views: 9892

Re: - Help - Programming a simple OS

Well in that case I've beaten you all, because I wrote my last operating system in machine code. Well I wrote my last one by waving rare earth magnets around the platters of my HD :lol: Just kidding. Actually my big plan for my Pi was to complete my book on OS development by writing all the example...
by jecxjo
Thu Jun 14, 2012 1:20 pm
Forum: C/C++
Topic: Calling Functions (newbie)
Replies: 9
Views: 4149

Re: Calling Functions (newbie)

As for the dev side of things... It surprises me really because although I can code in Java to say a good intermediate level, I never really had fun or enjoyed it. The Pi has kind of changed that in the fact I've had to start from the bottom up. I need to also get to grips with C ahead of a univers...
by jecxjo
Thu Jun 14, 2012 3:13 am
Forum: C/C++
Topic: Calling Functions (newbie)
Replies: 9
Views: 4149

Re: Calling Functions (newbie)

Ah, my bad, I thought the file would include the code too (must get my Java hat off... obviously in Java, you could just dump the code into another class, and invoke it accordingly.). If you start looking into C++ you will be able to create "inline functions" where the implementation is found in th...
by jecxjo
Wed Jun 13, 2012 9:48 pm
Forum: General discussion
Topic: X servers for Win & Mac
Replies: 18
Views: 6206

Re: X servers for Win & Mac

Another Windows option is mobaXterm. It has ssh, telnet, rsh, xdmcp, rdp, vnc support, built in X server and it is a mobile executable so just put it on a usb stick.

http://mobaxterm.mobatek.net/
by jecxjo
Wed Jun 13, 2012 8:28 pm
Forum: Advanced users
Topic: Please explain softfloat vs softfp vs hardfp
Replies: 11
Views: 32743

Re: Please explain softfloat vs softfp vs hardfp

And since all Pis have one, why bother with softfloat at all? Because the Debian stable version (squeeze) only supports ARM using the ARMv4+ softfloat ABI (armel), and this is the distro that the 'official' Debian image available from http://www.raspberrypi.org/downloads uses. The Debian unstable v...
by jecxjo
Wed Jun 13, 2012 7:52 pm
Forum: C/C++
Topic: Calling Functions (newbie)
Replies: 9
Views: 4149

Re: Calling Functions (newbie)

Am I also reading correctly that when it comes to using functions in this way, its better (and tidier) to bung them into a header file and include it? I can see the appeal there straight away in making the code easier to navigate let alone smaller files. I've yet to touch header files (with excepti...
by jecxjo
Wed Jun 13, 2012 5:04 pm
Forum: Troubleshooting
Topic: Pi = busted, yay.
Replies: 34
Views: 6121

Re: Pi = busted, yay.

devon wrote:decided on a whim to just *lightly* flick x1 a few times
You must have the unionized hamsters running your board's wheel...GET BACK TO WORK!!! :lol:
by jecxjo
Wed Jun 13, 2012 4:59 pm
Forum: Beginners
Topic: Powering through Powermonkey?
Replies: 2
Views: 999

Re: Powering through Powermonkey?

From what I've found looks like the power output is Output Voltage: 4.5 - 5.5V Output Current: 700mA max http://www.ncix.com/products/?sku=30127 So it looks like it meets the requirements. But you'd have to run off the monkey's batteries rather than just solar (only 200mA out). From other's power re...
by jecxjo
Wed Jun 13, 2012 4:46 pm
Forum: Off topic discussion
Topic: What are your Other Hobbies / Interests??
Replies: 72
Views: 12052

Re: What are your Other Hobbies / Interests??

Other interest besides embedded computers?!?! Just kidding. So many other things to list...hmmm. I'm an avid downhill skier, studied martial arts for most of my life. I grew up on Lake Michigan (one of the Great Lakes in the US) so I love being on the water and nature. The girlfriend and I go Geocac...
by jecxjo
Wed Jun 13, 2012 4:28 pm
Forum: C/C++
Topic: Calling Functions (newbie)
Replies: 9
Views: 4149

Re: Calling Functions (newbie)

03.c:30:3: warning: implicit declaration of function âcalcNumbersâ [-Wimplicit-function-declaration] The reason this warning pops up is due to the way the compiler processes the file. Think about how you would read the c file, line by line. First you read #include <stdio.h> . Now we know about all ...
by jecxjo
Wed Jun 13, 2012 3:27 pm
Forum: Beginners
Topic: minimize RAM usage ?
Replies: 7
Views: 3286

Re: minimize RAM usage ?

Hoax wrote:Am I able to chance from 192 to 224 easily by replacing the files, or is there anything I need to think before? I already updated the firmware with hexxeh's autp-updater for 192 settings..
If you use hexxeh's rpi-update then you can run

Code: Select all

rpi-update 224
then reboot.
by jecxjo
Wed Jun 13, 2012 3:24 pm
Forum: Beginners
Topic: Changing root name on Pi
Replies: 30
Views: 5640

Re: Changing root name on Pi

bredman wrote:The correct method to add a new user is described in the Wiki.
http://elinux.org/RPi_Beginners#Create_ ... privileges
Good find, crazy Debian with their sudo group rather than being like everyone else :twisted:
by jecxjo
Wed Jun 13, 2012 3:29 am
Forum: Beginners
Topic: Changing root name on Pi
Replies: 30
Views: 5640

Re: Changing root name on Pi

No the percent sign states that its a group. Here is an excerpt from man sudoers The User specification is the part that actually determines who may run what. root ALL = (ALL) ALL %wheel ALL = (ALL) ALL We let root and any user in group wheel run any command on any host as any user. FULLTIMERS ALL =...
by jecxjo
Wed Jun 13, 2012 3:21 am
Forum: Beginners
Topic: Changing root name on Pi
Replies: 30
Views: 5640

Re: Changing root name on Pi

Okay, but how do you give the group "wheel" sudo permissions? That is performed by editing the sudoers fileby running visudo . The line i stated above says the group wheel (%wheel) has access to all subsystems. If you really want to understand the structure run man sudoers but its dry and not impor...

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