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LED control / way to announce system statuses
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haseldow
Joined: Tue Jun 15, 2010 8:56 am
Posts: 5
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 LED control / way to announce system statuses This post might belong to the hardware section, but for me this is linux specific so I included it here.
I'm running linux on several fit-pc2 value models without display or any HID's (only power and network cable).
I'm trying to figure out how to somehow alert of events on the physical device itself (blink power LED on slow interval if network is down or blink power LED on a rapid interval if the device is shutting down, etc...).
As the device does not have a PC beeper, the only options I can think of are limited to the followng:
1. Blinking power/wifi/drive LED's
2. Installing a small speaker and attaching it to the 3.5mm line-out
3. Installing a USB device that can function as a diagnostic LED device
4. Installing a tiny USB LCD device
Considerations:
1. It seems like the 2.6.26 LED control kernel module does not include support for fit-pc2 LED's or they are not controllable at all. I could not find out if CompuLab kernel has this support.
2. The devices has no HDD so I could install the speaker inside the case with the speaker cable going inside the device from the wifi antenna hole (the device has no wifi). This is sure to work, but not what I would like to do.
3. As I haven't found out a suitable USB devices to do this, I would have to make them myself.
4. I haven't found a suitable (cheap and small) USB LCD panel. A one or two character 7-segment numeric display would also suffice if I could find one.
Any ideas or information on the LED control would be greatly appreciated.
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| Mon Mar 07, 2011 9:06 am |
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Denis
Joined: Sun Apr 26, 2009 3:24 pm
Posts: 261
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Re: LED control / way to announce system statuses Hi, You can control ON LED using GPIO8: Code: root@ubuntu-fitpc2:/ modprobe sch_gpio
root@ubuntu-fitpc2:/ echo 8 > /sys/class/gpio/export
root@ubuntu-fitpc2:/ echo out > /sys/class/gpio/gpio8/direction
root@ubuntu-fitpc2:/ echo 1 > /sys/class/gpio/gpio8/value
## at this point the fitpc2 ON LED should be in off-state.
root@ubuntu-fitpc2:/ echo 0 > /sys/class/gpio/gpio8/value
## at this point the fitpc2 ON LED should be in on-state again.
root@ubuntu-fitpc2:/ echo 8 > /sys/class/gpio/unexport Kernel module sch_gpio appears in mainline kernel and our kernel package in too.
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Denis, Fit-PC2/3/IntensePC support
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| Tue Mar 22, 2011 2:17 pm |
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yaakov
Joined: Wed May 11, 2011 10:24 am
Posts: 9
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Re: LED control / way to announce system statuses ==> Debian [BS"D]
Dear Denis,
how can I use the sch_gpio module in Debian?
I installed Debian/squeeze without any modifications. So far, the module is not available:
# modprobe sch_gpio
FATAL: Module sch_gpio not found.
Any hints would be appreciated.
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| Wed Aug 24, 2011 6:19 pm |
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Denis
Joined: Sun Apr 26, 2009 3:24 pm
Posts: 261
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Re: LED control / way to announce system statuses Hi, The sch_gpio has appeared in kernel since v2.6.35. Debian Squeeze runs on v2.6.32, so you will need to install more recent kernel. For example this: http://packages.debian.org/squeeze-back ... 6/download
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Denis, Fit-PC2/3/IntensePC support
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| Sun Aug 28, 2011 3:09 pm |
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