paparazzi-devel
[Top][All Lists]
Advanced
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Paparazzi-devel] [TWOG] CAM Port Pins

From: Kristofer Von Ahnen
Subject: Re: [Paparazzi-devel] [TWOG] CAM Port Pins
Date: Tue, 02 Dec 2014 23:13:39 -0600
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:24.0) Gecko/20100101 Thunderbird/24.6.0
Thanks for the help, everyone! I was able to get a reading from the servo pins but unfortunately it doesn't match up with the frequency and period settings supplied in the airframe config file. I don't know if this has to do with the dc.c file's age (I am required to work with a copy of Paparazzi from years ago), my wiring, or with something I have typed incorrectly. That said, I'll be developing code to use the CAM_SW pin as per Felix's advice. 

Thanks again for all your help.

Best,
~Kris
PS. Has anyone used the Paparazzi in conjunction with any of Matrix-Vision's sensors? (http://www.matrix-vision.com/) 

On 12/2/14, 4:55 PM, Rolf Noellenburg wrote:

Hello Heinrich,

you have to distinguish:
AUX is a 5V switchable power supply (approx. 1 A?). I used it with success in combination with 2 diodes (reduce the voltage > 1 V) to trigger a Canon S100 / ixus90is via CHDK/USB and all involved hardware survived. CAMSW is directly connected with the processor and therefore 3.3 V and only low current (few mA).
Both are GPIOs and on a TwoG: AUX is "POWER_SWITCH_GPIO" or "GPIOB,GPIO18" and CAMSW is "CAM_SWITCH_GPIO" or "GPIOB,GPIO22" like Felix already wrote. 

Rolf

Am 02.12.2014 21:21, schrieb Prof. Dr.-Ing. Heinrich Warmers:

Hi,
The CAM Output on the TWOG is a 5V power output. This output is a power output for a 5V video camera. If you use this signal direct usually the camera input (1.8V .. 3V) will be defect. 
You can use a 5V relay with this output.

You can also use a  normal servo with a micro switch or a camera module
with ppm input in combination with a servo output pin.

for paparazzi 5.03

for the block servo:
<servo name="DC_SHUTTER_SERVO" no"8" min="2000" neutral="1500" max"1000" /> 

for the block  comand _laws:

<set servo"DC_SUTTER_SERVO" value"@DC_SHUTTER_SERVO"/>

Best regards,
Heinrich


Felix Ruess schrieb:

Or for the Twog:
    <load name="digital_cam.xml">
      <define name="DC_SHUTTER_GPIO" value="CAM_SWITCH_GPIO"/>
    </load>
which equals
    <load name="digital_cam.xml">
      <define name="DC_SHUTTER_GPIO" value="GPIOB,GPIO22"/>
    </load>

If you simply want to control the gpio directly in your own code:
Set the gpio up as output:
gpio_setup_output(CAM_SWITCH_GPIO);
And then set or clear the pin as disired:
gpio_set(CAM_SWITCH_GPIO);
gpio_clear(CAM_SWITCH_GPIO);
On Tue, Dec 2, 2014 at 8:03 PM, Eduardo lavratti <address@hidden <mailto:address@hidden>> wrote: 

    For sure you can use the CAM_SW as camera trigger.
    Use an optocoupler to connect this pin to your camera.

    Use something like this to control the cam_sw pin

        <load name="digital_cam.xml">
          <define name="DC_SHUTTER_GPIO" value="GPIOC,GPIO12"/>
        </load>



    > Date: Tue, 2 Dec 2014 06:52:26 -0600
    > From: address@hidden
    <mailto:address@hidden>
> To: address@hidden <mailto:address@hidden> 
    > Subject: Re: [Paparazzi-devel] [TWOG] CAM Port Pins

    >
    > Is there a way to signal it On/Off? I guess voltage regulation
    is the
    > wrong phrase.
    >
    > ~Kris
    >
    > On 12/02/2014 02:46 AM, Rolf Noellenburg wrote:
    > > Hello Kris,
    > >
    > > following the schematics given on the side of your link,
    CamSW is on a
    > > pin similar to a led switch and is not suitable to control a
    servo.
    > > Only the outputs SRV0 to SRV7 can drive a servo directly on a
    TwoG.
    > >
    > > By the way: the servo pins don't adjust a voltage in order to
    modify
    > > the position of the servo but provide a PWM signal which is
    translated
    > > to a corresponding angle by the servo.
    > >
    > > Best regards,
    > > Rolf
    > >
    > >
    > > Am 02.12.2014 01:03, schrieb Kristofer Von Ahnen:
    > >> Is it possible to regulate the voltage of the CamSW pin on
    the TWOG
    > >> board (http://wiki.paparazziuav.org/wiki/TWOG/v1.0) for
    sending a
    > >> hardware signal to a separate device? I notice in the
    cam_control
    > >> module that the servo pins are being used to adjust a camera's
    > >> position by sending commands, but can the same be done with
    the CamSW
    > >> pin?
    > >>
    > >> Best,
    > >> ~Kris
    > >>
    > >> _______________________________________________
    > >> Paparazzi-devel mailing list
    > >> address@hidden <mailto:address@hidden>
    > >> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
    > >>
    > >
    > >
    > > _______________________________________________
    > > Paparazzi-devel mailing list
    > > address@hidden <mailto:address@hidden>
    > > https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
    >
    >
    > _______________________________________________
    > Paparazzi-devel mailing list
    > address@hidden <mailto:address@hidden>
    > https://lists.nongnu.org/mailman/listinfo/paparazzi-devel

    _______________________________________________
    Paparazzi-devel mailing list
    address@hidden <mailto:address@hidden>
    https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
------------------------------------------------------------------------ 

_______________________________________________
Paparazzi-devel mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/paparazzi-devel



_______________________________________________
Paparazzi-devel mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/paparazzi-devel



_______________________________________________
Paparazzi-devel mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
reply via email to
[Prev in Thread] Current Thread [Next in Thread]