Difference between revisions of "FAQ:fitlet2"

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(I can see an additional COM port in the device manager, where is it physically?)   (change visibility)
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===I can see an additional COM port in the device manager, where is it physically?===
 
===I can see an additional COM port in the device manager, where is it physically?===
  
*fitlet2 comes with a single RS232 ultra-mini com port.
+
*fitlet2 comes with a single RS232 ultra-mini com port (COM1)
*There is another COM ports inside the chassis for the use of developing additional FACET cards.
+
*There is another COM ports inside the chassis (COM2O) for the use of developing additional FACET cards.
 
*That additional COM port is no accessible externally whatsoever.
 
*That additional COM port is no accessible externally whatsoever.
  

Revision as of 13:43, 21 March 2018

General

Hardware

How to control fitlet2 front LEDs?

fitlet2 has 2 LEDs, LED1 and LED2. Each of them has GREEN and YELLOW parts that can be controlled separately.

In Linux kernel there are 4 related GPIOs: GPIO435, GPIO436, GPIO437, GPIO438.

  • GPIO435 - LED1 GREEN
  • GPIO436 - LED1 YELLOW
  • GPIO437 - LED2 GREEN
  • GPIO438 - LED2 YELLOW

To control the GPIOs need to login as root (root password required):

$ su
Password:

To control for example LED1 GREEN part:

$ echo 435 > /sys/class/gpio/export
$ echo out > /sys/class/gpio/gpio435/direction
$ echo 1 > /sys/class/gpio/gpio435/value
# LED1 should be GREEN now
$ echo 0 > /sys/class/gpio/gpio435/value
# LED1 should be OFF now
$ echo 435 > /sys/class/gpio/unexport

The GPIO framework and GPIO sysfs interface are documented in https://www.kernel.org/doc/Documentation/gpio/gpio.txt

I can see an additional COM port in the device manager, where is it physically?

  • fitlet2 comes with a single RS232 ultra-mini com port (COM1)
  • There is another COM ports inside the chassis (COM2O) for the use of developing additional FACET cards.
  • That additional COM port is no accessible externally whatsoever.

Software