001-hello

C++ implementation

node {
                       // Sensor interface: 
#define AOpin  0     // Analog output - yellow
#define SIpin  3     // Start Integration - orange
#define CLKpin 2     // Clock - red
                     // Vcc - brown
                     // GND - black
#define NPIXELS 128  // No. of pixels in array
byte Pixel[NPIXELS]; // Field for measured values <0-255>
#define FASTADC 1
 // defines for setting and clearing register bits
 #define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
 #define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
void setup(void)
{
   pinMode(SIpin, OUTPUT);
   pinMode(CLKpin, OUTPUT);
   //pinMode (AOpin, INPUT);

   digitalWrite(SIpin, LOW);   // IDLE state
   digitalWrite(CLKpin, LOW);  // IDLE state
#if FASTADC
  // set prescale to 16
  sbi(ADCSRA,ADPS2);
  cbi(ADCSRA,ADPS1);
  cbi(ADCSRA,ADPS0);
#endif
   Serial.begin (115200);
}
void loop (void)
{
   int i;
   int expTime;
   delayMicroseconds (1);  /* Integration time in microseconds */
   delay(10);              /* Integration time in miliseconds  */
   digitalWrite (CLKpin, LOW);
   digitalWrite (SIpin, HIGH);
   digitalWrite (CLKpin, HIGH);
   digitalWrite (SIpin, LOW);
   delayMicroseconds (1);
/* and now read the real image */
   for (i = 0; i < NPIXELS; i++) {
     Pixel[i] = analogRead (AOpin)/4 ; // 8-bit is enough
     digitalWrite (CLKpin, LOW);
     delayMicroseconds (1);
     digitalWrite (CLKpin, HIGH);
   }
   Serial.write ((byte)0);            // sync byte = 0
   for (i = 0; i < NPIXELS; i++) {
       Serial.write ((byte)Pixel[i]+1);
   }
}
        }
        auto inValue = getValue<input_IN>(ctx);
        emitValue<output_OUT>(ctx, inValue);
    }
}