Hal V. Engel ha scritto:
> On Saturday 21 November 2009 03:14:35 pm Nicola Quargentan wrote:
>> Hal V. Engel ha scritto:
>>> On Thursday 19 November 2009 04:59:28 pm Nicola Quargentan wrote:
>> cut...
>>
>>>> I will also build some knobs (like obs) to manage vor and adf: I want to
>>>> use a Microchip pic whit some A/D converter (12bit) and an USB port.
>>>>
>>>> Has anyone tried the products of Saitek?
>>>> Where I can find some documentation about my project?
>>>>
>>>> Thanks and sorry for my english.
>>> You might consider using a joystick controller board like the ones here:
>>>
>>> http://www.lbodnar.dsl.pipex.com/
>> Thanks for the information, this gadget is pretty cool :)
>>
>>> These are inexpensive and allow for numerous analog inputs as well as
>>> many buttons/switches. In addition binary encoders are also supported
>>> (these would work nicely for the frequency control on a radio). You
>>> should be able to use these to create things like a radio panels, trim
>>> wheels, flap controls, switch panels and other controls for your custom
>>> cockpit. You can use more than one and no special drivers are needed
>>> (these are HID/USB joystick devices that work with off the self drivers).
>>> So once you have something setup (like a radio stack) you would
>>> interface it to flightgear just like you do with a normal joystick.
>> Uhmm, I'm not sure how to operate the obs or adjust the nav frequency.
>> Inside the XML files (like joystick) I haven't found anything that
>> commands a knob of the radio. Do you know where I can find more complete
>> documentation about this, or some examples?
>
> I don't think it would be that hard. I suspect that you might need to write
> a
> nasal script to handle it and in that script you would manipulate the
> properties for the radio as the control was manipulated. There are some
> joystick XML files that have nasal script in them to do other types of things
> so you should be able to find some examples that will at least give you some
> clues about how to go about it. It is easy to change various properties
> inside a nasal script. Also I think there are likely others here that would
> be able to point you toward examples that are a closer fit to what you want
> to
> do.
I found this line on 737-300 (but there are they also in more aircraft):
<action>
<name>nav frequency decrease</name>
<button>0</button>
<x>50</x>
<y>35</y>
<w>8</w>
<h>8</h>
<binding>
<command>property-adjust</command>
<property alias="../../../../params/nav-freq-standby-prop"/>
<step>-0.05</step>
<min>108.0</min>
<max>117.95</max>
<resolution>0.05</resolution>
<wrap>true</wrap>
</binding>
</action>
I found also:
<action>
<name>OBS small counter-clockwise rotation</name>
<button>0</button>
<x>-46</x>
<y>-56</y>
<w>12</w>
<h>24</h>
<binding>
<command>property-adjust</command>
<property>/instrumentation/nav[0]/radials/selected-deg</property>
<step>1.0</step>
<min>0</min>
<max>360</max>
<wrap>1</wrap>
</binding>
</action>
I Think I can select nav frequencies and rotate OBS with button 0. But I
didn't find any use of the axis ( for example, using a joystick ).
--
Nicola Quargentan
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