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by Serac
Sun Feb 24, 2013 1:24 pm
Forum: General discussion
Topic: how to keep the command run after 'putty' is closed
Replies: 5
Views: 1664

Re: how to keep the command run after 'putty' is closed

Code: Select all

nohup ./script.sh
For further details, see man nohup - Note: You may want to redirect the output from your echo to the log file rather than relying on piping it through tee.
by Serac
Tue Feb 05, 2013 1:44 pm
Forum: Automation, sensing and robotics
Topic: rtstepperemc CNC for RPI
Replies: 12
Views: 5435

Re: rtstepperemc CNC for RPI

I am skeptical about the future of linuxcnc as such on the RPi, but it does indicate the level of interest and direction. I am rather thinly spread as far as doing much more legwork specifically on the Ecklersoft dongle & current software, but believe as a concept, is prob the best way to go, (that...
by Serac
Mon Jan 28, 2013 12:10 am
Forum: Automation, sensing and robotics
Topic: rtstepperemc CNC for RPI
Replies: 12
Views: 5435

Re: rtstepperemc CNC for RPI

So, until Raspbian development reaches a steady and stable state it is difficult to tell whats going on. If you do have any ideas about how to speed things up at a coding level, then do please share. I am aware of at least one code developer who has taken an interest in this. I am also aware of the...
by Serac
Sun Jan 27, 2013 5:59 pm
Forum: Automation, sensing and robotics
Topic: rtstepperemc CNC for RPI
Replies: 12
Views: 5435

Re: rtstepperemc CNC for RPI

Looked over the rtstepperemc code a couple of months back - There is scope to improve things and remove some of the bottlenecks. Without resorting to low level coding, you could try using (re)nice to bump up the priority of the core executable.
by Serac
Sun Jan 27, 2013 5:46 pm
Forum: Media centres
Topic: XBMC OpenELEC and LCD HD44780 via GPIO
Replies: 108
Views: 81406

Re: XBMC OpenELEC and LCD HD44780 via GPIO

The problem might be, to make this setup, in a permanent openelec release, without copy and editing files. That may be a little easier now - A dedicated driver for the Raspberry Pi has now been included in the LCDProc CVS repository. The next official release should include it, but as yet, no date ...
by Serac
Wed Dec 26, 2012 11:03 am
Forum: Media centres
Topic: XBMC OpenELEC and LCD HD44780 via GPIO
Replies: 108
Views: 81406

Re: XBMC OpenELEC and LCD HD44780 via GPIO

And of course, in trying to compile lcdproc on its own, I got a lovely " hd44780-rpi.c:284:2: error: 'PrivateData' has no member named 'rpi_gpio' " message. That should not happen as rpi_gpio is declared at line 161 in hd44780-low.h... Unless your compiler is not defining the __ARMEL__ flag. This c...
by Serac
Mon Dec 24, 2012 9:16 pm
Forum: Media centres
Topic: XBMC OpenELEC and LCD HD44780 via GPIO
Replies: 108
Views: 81406

Re: XBMC OpenELEC and LCD HD44780 via GPIO

Looks like one or two people might be having trouble with pkg-config.. In which case, try: ./configure --enable-drivers=hd44780 --disable-libusb --disable-libusb-1-0 --disable-libhid --disable-libftdi --disable-freetype If there are any errors or warnings generated by configure, don't waste time by ...
by Serac
Sun Dec 23, 2012 2:12 pm
Forum: Media centres
Topic: XBMC OpenELEC and LCD HD44780 via GPIO
Replies: 108
Views: 81406

Re: XBMC OpenELEC and LCD HD44780 via GPIO

Updated paul_c's patch - Highlights include: * Added backlight support * Updated for Rev 2 boards * Fixed a potential NULL pointer bug To use, grab the latest sources from the LCDproc repository cvs -z3 -d:pserver:[email protected].cvs.sourceforge.net:/cvsroot/lcdproc co -P lcdproc Copy the attached...
by Serac
Sun Dec 02, 2012 12:48 pm
Forum: General discussion
Topic: PLC / Ladder Software
Replies: 9
Views: 10870

Re: PLC / Ladder Software

There's a much more mature product in ClassicLadder , but getting RaspPi support in there might be more work. ClassicLadder should compile and run just fine on a Pi -- Driving the GPIO will take a little effort, but it would be a fairly trivial exercise in C programming (did a PCI driver some years...
by Serac
Sat Nov 10, 2012 4:18 pm
Forum: Other projects
Topic: "command not found" driving me crazy..
Replies: 10
Views: 1845

Re: "command not found" driving me crazy..

Had a quick look at the Openbeacon downloads - The executables are precompiled binaries aimed at x86-32 systems so will not work on a Pi (which requires ARM binaries). Suggest reading http://bobolink.tumblr.com/post/34027033829/bb-openbeacon for details on how to compile the software for the ARM boa...
by Serac
Fri Nov 09, 2012 1:03 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Serial port - is this what I need ?
Replies: 32
Views: 7324

Re: Serial port - is this what I need ?

Cable - A straight through male to male cable should work fine. You could try a gender changer, but watch out for some of the signals being crossed - Not all "RS232" cables are wired the same... Connect the power pins to the respective GND and 3.3V pins on the Pi. The Tx pin on the board needs to go...
by Serac
Fri Oct 26, 2012 11:53 pm
Forum: Other projects
Topic: HD44780 on Raspberry
Replies: 3
Views: 2269

Re: HD44780 on Raspberry

You've seen: http://www.raspberrypi-spy.co.uk/2012/0 ... ng-python/ ?

Once you've got the module wired up and working with a Pi, I'd suggest searching this forum for LCDproc and the patch used to drive a HD44780 via the GPIO.
by Serac
Fri Oct 26, 2012 11:42 pm
Forum: Other projects
Topic: Case Project: Dedicated ZX Spectrum Emulation Machine
Replies: 16
Views: 11866

Re: Case Project: Dedicated ZX Spectrum Emulation Machine

Jamesbeat wrote:The only drawback is that I can't get rid of the mouse pointer.
http://www.noah.org/wiki/cursor_disable_in_X11

Note to self: Must try that myself on the t/s boxen.
by Serac
Fri Oct 26, 2012 3:30 pm
Forum: Debian
Topic: A tiny version of Raspbian?
Replies: 2
Views: 1200

Re: A tiny version of Raspbian?

Have you looked at http://www.raspbian.org/RaspbianInstaller ?

Assuming the same functionality as the standard Debian installer, it should allow you to install the minimum of packages to support your application.
by Serac
Thu Oct 25, 2012 12:06 pm
Forum: General discussion
Topic: SIMPL toolkit for Raspberry Pi
Replies: 10
Views: 1717

Re: SIMPL toolkit for Raspberry Pi

How are software packages typically imported to the Raspberry Pi? I'd love to get the SIMPL toolkit packaged to be convenient for this community to use. Most users seem to be using the Debian based packages from Rasbian, so I'd suggest updating your simpl/debian files and build a package from there.
by Serac
Wed Oct 24, 2012 11:54 pm
Forum: Beginners
Topic: SinglePurpose Operating System
Replies: 4
Views: 855

Re: SinglePurpose Operating System

If it is compiled for x86, then no. It will not run on a Pi. To call it a "Single Purpose Operating System" is a little misleading in my opinion. What it does is build a core Debian/Linux image and run a single app - That in it's self makes for an interesting project, and one I ca find uses for else...
by Serac
Wed Oct 24, 2012 7:41 pm
Forum: Advanced users
Topic: modem misery
Replies: 9
Views: 2951

Re: modem misery

Temporary outage - It appears to be loading just fine for me.

If all else fails in the future, you could try looking to see if the page is cached by google or archived on the wayback machine.
by Serac
Wed Oct 24, 2012 9:58 am
Forum: Off topic discussion
Topic: Bye Bye Ceefax
Replies: 2
Views: 558

Re: Bye Bye Ceefax

<sniff> Killed off before you had a chance to grow old. May you rest in peace.
by Serac
Tue Oct 23, 2012 11:59 am
Forum: Off topic discussion
Topic: Don't eat the desiccant ...
Replies: 6
Views: 1272

Re: Don't eat the desiccant ...

Silica gel in it's self is fairly innocuous substance and is unlikely to cause any damage if small quantities are ingested. However, the additives used as colour indicators may be toxic in high enough doses. From the wikipedia page: Silica gel is non-toxic, non-flammable, and non-reactive and stable...
by Serac
Mon Oct 22, 2012 10:46 am
Forum: Advanced users
Topic: Wanting to create a new distro or fork of an existing distro
Replies: 2
Views: 1105

Re: Wanting to create a new distro or fork of an existing di

Debian have a number of tools available for building "custom" distros. simple-cdd is one that springs to mind but if you are looking at building an SD image, livecd might be a better option. Note: Raspbian can be substituted for Debian if you intend to target a Raspberry Pi, although you may have to...
by Serac
Sun Oct 21, 2012 12:09 pm
Forum: Other
Topic: Tiny Core Linux
Replies: 67
Views: 32090

Re: Tiny Core Linux

http://distro.ibiblio.org/tinycorelinux/4.x/armv6/ - Looks like there is a Raspberry Pi version.
by Serac
Fri Oct 19, 2012 9:03 pm
Forum: Beginners
Topic: Raspberry pi to CNC
Replies: 1
Views: 7483

Re: Raspberry pi to CNC

Mach 3 is a M$ Windows only app, so it will not run on a Pi - There has been rumours of a Linux version, but that is more likely vapourware from a wishful individual. Linuxcnc, better known as EMC2 may run on a Pi, but you'd have to write your own driver for it, do a lot of patching & compiling. Ext...
by Serac
Thu Oct 18, 2012 3:06 pm
Forum: Bare metal, Assembly language
Topic: System Timers
Replies: 8
Views: 3744

Re: System Timers

I'll try the gettimeofday however it feels a bit hacky ... How precise does the time need to be ? For portable code I'd suggest you use the POSIX clock_gettime() call rather than gettimeofday() - The latter, whilst part of the POSIX specification, POSIX.1-2008 marks gettimeofday() as obsolete (acco...
by Serac
Tue Oct 16, 2012 2:00 pm
Forum: Off topic discussion
Topic: Mosfet switches for high current devices??
Replies: 2
Views: 1907

Re: Mosfet switches for high current devices??

In general, power mosfets have gate capacitance that can generate high currents when switching fast. Unless you get a device specifically designed to switch at logic levels, they also benefit from higher gate voltages. The last time I did a power mosfet design, used a dedicated gate drive chip that ...
by Serac
Fri Oct 12, 2012 8:49 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Second SIO/UART
Replies: 11
Views: 16794

Re: Second SIO/UART

An alternative might be a UART board plugged in to either the SPI or i2c bus. http://www.ebay.com/itm/120966864751 could be a candidate - 3.3V if only the sample code & schematics were downloadable.

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