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by exstud
Mon May 20, 2013 12:18 pm
Forum: Other projects
Topic: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced
Replies: 225
Views: 255488

Re: Turn Raspberry Pi into a P.L.C (Programable Logic Contro

Actually, structured text is very much like a C language and I constantly have clients insisting that everything be written in Ladder because that's what their electricians turned PLC programmers can understand It's actually more like assembler and has a very long way to go to catch up with OO lang...
by exstud
Sun May 19, 2013 1:59 pm
Forum: Other projects
Topic: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced
Replies: 225
Views: 255488

Re: Turn Raspberry Pi into a P.L.C (Programable Logic Contro

At least it will be good for simulation/educational purposes if we get Beremiz working on Raspberry Pi If that is your ambition for this project, but imo it's just a matter of time before we see affordable powerful hardware like the PI that actually can compete with PLCs on all fronts, and waay bey...
by exstud
Sun May 19, 2013 8:49 am
Forum: Other projects
Topic: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced
Replies: 225
Views: 255488

Re: Turn Raspberry Pi into a P.L.C (Programable Logic Contro

A PLC has its OS in non volatile ROM, which makes it more robust against crashes/power failures. Try hard resetting your pi over and over again (pref during startup), at some point your fancy linux OS will die. Now don't get me wrong, as a developer of both platforms I hate those expensive 25k RAM (...
by exstud
Tue Mar 05, 2013 3:47 pm
Forum: Arch
Topic: refresh usb device
Replies: 1
Views: 3989

refresh usb device

Hi

My huawei 3g modem sometimes doesn't get recognized (not present in lsusb, rebooting doesn't help it, powering off/on the system does). Is there a way to reload/refresh all usb devices?

tx
by exstud
Thu Feb 21, 2013 12:54 pm
Forum: Other programming languages
Topic: Mono (C#) anyone?
Replies: 64
Views: 45007

Re: Mono (C#) anyone?

Do you build mono on the RPi? I just tried it and it failed with an out of memory exception...
by exstud
Wed Feb 20, 2013 9:11 am
Forum: Other programming languages
Topic: Mono (C#) anyone?
Replies: 64
Views: 45007

Re: Mono (C#) anyone?

>> Now all we need is the Hardware Floating Point Patch for Mono on the R-Pi !

Is anyone working on this? I'm having issues with mono on archlinux ... what OS should I use to have a stable mono (now and after the next update)?
by exstud
Tue Jan 08, 2013 10:57 am
Forum: Arch
Topic: kernel panic - not syncing VFS
Replies: 2
Views: 1925

Re: kernel panic - not syncing VFS

Could be some rare power glitch, yes, idk... I'll try a massive cap on the 5V usb line to see if it helps any. Not sure if it's 'syncing' when rebooting or what that even means, it reboots by executing a reboot command (initiated by a mono/c# app)... But I think I solved it by changing the value in ...
by exstud
Mon Jan 07, 2013 9:25 am
Forum: Arch
Topic: kernel panic - not syncing VFS
Replies: 2
Views: 1925

kernel panic - not syncing VFS

Hi Sometimes (like 1 in 10000 times) my arch raspberry won't boot and gives the following message: [ 3.566703] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown block (179, 2) PANIC: VFS: Unable to mount root fs on unknown block (179, 2) Entering kdb (current=0xdb82aca0, pid 1) due...
by exstud
Tue Dec 11, 2012 1:36 pm
Forum: Other programming languages
Topic: A working Mono someday?
Replies: 15
Views: 6356

Re: A working Mono someday?

>> or should I give up all hope?

Yep, just forget about wpf/winforms, bind a socket to port 80 and build yourself a html/js UI.
by exstud
Tue Dec 11, 2012 12:23 pm
Forum: Arch
Topic: watchdog
Replies: 4
Views: 2156

Re: watchdog

I don't think I even have swap, fstab doesn't have a swap type entry and swapon -s shows nothing even before swapoff -a # /etc/fstab: static file system information # # <file system> <dir> <type> <options> <dump> <pass> devpts /dev/pts devpts defaults 0 0 shm /dev/shm tmpfs nodev,nosuid 0 0 /dev/mmc...
by exstud
Tue Dec 11, 2012 9:57 am
Forum: Arch
Topic: watchdog
Replies: 4
Views: 2156

Re: watchdog

Thank you very much, I followed your instructions (had to create file /etc/modules-load.d/bcm2708_wdog.conf and put bcm2708_wdog in it), then tried to test it with : modprobe bcm2708_wdog systemctl start watchdog swapoff -a : (){ :|:& };: (first two lines are just to make sure it's running...) Syste...
by exstud
Mon Dec 10, 2012 12:05 pm
Forum: Arch
Topic: watchdog
Replies: 4
Views: 2156

watchdog

Hi I found this page to setup the watchdog on the pi: http://pi.gadgetoid.co.uk/post/001-who-watches-the-watcher But can't translate it to arch linux... I managed to do a pacman -S watchdog and edit the watchdog.conf file but have no idea what the other commands translate to in arch any help well ap...

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