Volume up and down in a NXC_VOL4

Comments

• Auser Posts: 506

  January 2008

  Not sure what channels you need to control on the vol card, but here's a very basic example that should get you started.
  

  DEFINE_DEVICE
  dvKP      = 85:1:0  // The device should match whatever you're using
  
  DEFINE_CONSTANT
  char      LVL_VOL_CARD_CHANNEL_LEFT   = 1
  char      LVL_VOL_CARD_CHANNEL_RIGHT  = 2
  char      KP_VOL_UP                   = 6  // Or whatever they may be
  char      KP_VOL_DN                   = 7
  integer   KP_VOLUME_BUTTONS[]         = {KP_VOL_UP,KP_VOL_DN}
  
  DEFINE_VARIABLE
  integer    nVolume       = 0
  dev        dvVOL_CARD[]  = {1:1:0,1:2:0}   // The device should match whatever you're using
  
  DEFINE_EVENT
  button_event[dvKP,KP_VOLUME_BUTTONS]
  {
    hold[.9]:
    {
      switch(button.input.channel)
      {
        case KP_VOL_UP:
        {
          if(nVolume<255)
            nVolume++
        }
        case KP_VOL_DN:
        {
          if(nVolume>0)
            nVolume--
        }
      }
      send_level dvVOL_CARD, LVL_VOL_CARD_CHANNEL_LEFT, nVolume
      send_level dvVOL_CARD, LVL_VOL_CARD_CHANNEL_RIGHT, nVolume
    }
  }
  

  
  A few things to note:
  
  * The volume card channels can be controlled via levels 1 and 2 on each of ports 1 and 2 on the vol card device. Presumably AMX split them up like this so that programmatically the card behaves like two stereo pairs. The above code should ramp all four channels on the card together.

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• Joe Hebert Posts: 2,159

  January 2008

  Another way to ramp volume up or down from its current level is with the TO command inside the PUSH of the BUTTON_EVENT for your Mio Keypad. For example:
  

  BUTTON_EVENT[dvMio,5] { //volume up button
  
     PUSH: {
        
        TO[dvVol4,1] //ramps volume up on audio channels 1 and 2 of Vol4 card while button is held down
     }
  }
  
  BUTTON_EVENT[dvMio,6] { //volume down button
  
     PUSH: {
        
        TO[dvVol4,2] //ramps volume down on audio channels 1 and 2 of Vol4 card while button is held down
     }
  }
  

  
  The channel numbers for the Vol4 card are listed in a table on page 2 of the quick start guide.
  
  HTH

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• lomeraniel Posts: 20

  January 2008

  Assignment channels
  
  Thanks, I'll try both solutions to see what's the one that matcher better with my prog.
  
  Btw, the channels you are talking about are the assignment channels? I thought about using them because it seemed the easiest way but I didn't know how to use them. But I've call AMX UK yesterday and they told me no to use them
  
  I start to see some light :P

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• Joe Hebert Posts: 2,159

  January 2008

  lomeraniel wrote:

  Btw, the channels you are talking about are the assignment channels? I thought about using them because it seemed the easiest way but I didn't know how to use them. But I've call AMX UK yesterday and they told me no to use them

  Yes, the assignment channels. Not sure why UK would tell you not to use them. I've used them in the past without any problems.
  
  Good luck.

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• Auser Posts: 506

  January 2008

  Joe Hebert wrote:

  Yes, the assignment channels. Not sure why UK would tell you not to use them. I've used them in the past without any problems.

  
  Either are quite acceptable, though I do tend to be fairly explicit in controlling devices and tracking their current state for various reasons. The choice really depends on what you're doing.

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• lomeraniel Posts: 20

  January 2008

  Nxc Vol 4
  
  I've tested on site yesterday with the TO inside the push and worked perfectly. Thanks

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