photoinputToDmx.ino

/*
  DMX_Master.ino - Example code for using the Conceptinetics DMX library
  Copyright (c) 2013 W.A. van der Meeren <[email protected]>.  All right reserved.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 3 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/


#include <Conceptinetics.h>


//
// CTC-DRA-13-1 ISOLATED DMX-RDM SHIELD JUMPER INSTRUCTIONS
//
// If you are using the above mentioned shield you should 
// place the RXEN jumper towards pin number 2, this allows the
// master controller to put to iso shield into transmit 
// (DMX Master) mode 
//
//
// The !EN Jumper should be either placed in the G (GROUND) 
// position to enable the shield circuitry 
//   OR
// if one of the pins is selected the selected pin should be
// set to OUTPUT mode and set to LOGIC LOW in order for the 
// shield to work
//


//
// The master will control 100 Channels (1-100)
// 
// depending on the ammount of memory you have free you can choose
// to enlarge or schrink the ammount of channels (minimum is 1)
//
#define DMX_MASTER_CHANNELS   100 

//
// Pin number to change read or write mode on the shield
//
#define RXEN_PIN                2


// Configure a DMX master controller, the master controller
// will use the RXEN_PIN to control its write operation 
// on the bus
DMX_Master        dmx_master ( DMX_MASTER_CHANNELS, RXEN_PIN );
int sensorPin = A0;
int sensorValue = 0;
int outputValue = 0;

int knownSensorMax = 0;    // Init with lowest possible analog sensor max
int knownSensorMin = 1023; // Init with highest possible analog sensor min

// the setup routine runs once when you press reset:
void setup() {             
  
  // Enable DMX master interface and start transmitting
  dmx_master.enable ();  
  
  // Set channel 1 - 50 @ 50%
  dmx_master.setChannelRange ( 2, 25, 127 );
  //Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() 
{
  sensorValue = analogRead(sensorPin); // 30 - 5
  
  // Update max if higher than known value
  if (sensorValue > knownSensorMax) {
    knownSensorMax = sensorValue;
  }
  
    // Update max if lower than known value
  if (sensorValue < knownSensorMin) {
    knownSensorMin = sensorValue;
  }
  
  // Dark = high resistance = high sensor value
  // Map high sensor value to low DMX value
  outputValue = map(sensorValue, knownSensorMin, knownSensorMax, 255, 0); 
  outputValue = constrain(outputValue, 0, 255);
  dmx_master.setChannelValue ( 1, outputValue );  
  
  delay ( 10 );
}