VCNL40x0test.ino

#include <Wire.h>
#include "VCNL40x0.h"

#define VERSION "Version: 1.2 01/2012"

#define  unsigned int i=0;
#define unsigned char ID=0;
#define unsigned char Command=0;
#define unsigned char Current=0;
#define unsigned int ProxiValue=0;
#define unsigned int SummeProxiValue=0;
#define unsigned int AverageProxiValue=0;
#define unsigned int AmbiValue=0;
#define unsigned char InterruptStatus=0;
#define unsigned char InterruptControl=0;

VCNL40x0 VCNL40x0_Device();

void setup() {

    Serial.begin(9600);

    // print information on screen
    Serial.println("VCNL4010/4020/3020 Proximity/Ambient Light Sensor");
    Serial.println(VERSION);
    Serial.println("Demonstration #4:");
    Serial.println("Proximity Measurement and Ambient light Measurement in selftimed mode");
    Serial.println("Proximity with 31 measurements/s, Ambient light with 2 measurement/s");
    Serial.println("Interrupt waiting on proximity value > upper threshold limit");
    VCNL40x0_Device.ReadID (&ID); // Read VCNL40x0 product ID revision register
    Serial.println("Product ID Revision Register: %d", ID);
    VCNL40x0_Device.SetCurrent (20); // Set current to 200mA
    VCNL40x0_Device.ReadCurrent (&Current); // Read back IR LED current
    Serial.println("\n IR LED Current: %d", Current);
    // stop all activities (necessary for changing proximity rate, see datasheet)
    VCNL40x0_Device.SetCommandRegister (COMMAND_ALL_DISABLE);
    // set proximity rate to 31/s
    VCNL40x0_Device.SetProximityRate (PROX_MEASUREMENT_RATE_31);
    // enable prox and ambi in selftimed mode
    VCNL40x0_Device.SetCommandRegister (COMMAND_PROX_ENABLE |
    COMMAND_AMBI_ENABLE |
    COMMAND_SELFTIMED_MODE_ENABLE);
    // set interrupt control for threshold
    VCNL40x0_Device.SetInterruptControl (INTERRUPT_THRES_SEL_PROX |
    INTERRUPT_THRES_ENABLE |
    INTERRUPT_COUNT_EXCEED_1);
    // set ambient light measurement parameter
    VCNL40x0_Device.SetAmbiConfiguration (AMBI_PARA_AVERAGE_32 |
    AMBI_PARA_AUTO_OFFSET_ENABLE |
    AMBI_PARA_MEAS_RATE_2);
    // measure average of prox value
    SummeProxiValue = 0;

    for (i=0; i<30; i++) {
        do { // wait on prox data ready bit
            VCNL40x0_Device.ReadCommandRegister (&Command); // read command register
        } while (!(Command & COMMAND_MASK_PROX_DATA_READY)); // prox data ready ?

        VCNL40x0_Device.ReadProxiValue (&ProxiValue); // read prox value
        SummeProxiValue += ProxiValue; // Summary of all measured prox values
    }

    AverageProxiValue = SummeProxiValue/30; // calculate average
    VCNL40x0_Device.SetHighThreshold (AverageProxiValue+100); // set upper threshold for interrupt
    Serial.println("Upper Threshold Value: %i cts\n\n", AverageProxiValue+100);
    delay(2000); // wait 2s (only for display)
}

void loop() {
// wait on data ready bit
    do {
        VCNL40x0_Device.ReadCommandRegister (&Command); // read command register
    } while (!(Command & (COMMAND_MASK_PROX_DATA_READY | COMMAND_MASK_AMBI_DATA_READY))); // data ready ?

    // read interrupt status register
    VCNL40x0_Device.ReadInterruptStatus (&InterruptStatus);

    // check interrupt status for High Threshold
    if (InterruptStatus & INTERRUPT_MASK_STATUS_THRES_HI) {
        //mled2 = 1; // LED on, Interrupt
        VCNL40x0_Device.SetInterruptStatus (InterruptStatus); // clear Interrupt Status
        //mled2 = 0; // LED off, Interrupt
    }

    // prox value ready for using
    if (Command & COMMAND_MASK_PROX_DATA_READY) {
        //mled0 = 1; // LED on, Prox Data Ready
        VCNL40x0_Device.ReadProxiValue (&ProxiValue); // read prox value
        // print prox value and interrupt status on screen
        Serial.println("\nProxi: %5.0i cts \tInterruptStatus: %i", ProxiValue, InterruptStatus);
        //mled0 = 0; // LED off, Prox data Ready
    }

    // ambi value ready for using
    if (Command & COMMAND_MASK_AMBI_DATA_READY) {
        //mled1 = 1; // LED on, Ambi Data Ready
        VCNL40x0_Device.ReadAmbiValue (&AmbiValue); // read ambi value
        // print ambi value and interrupt status on screen
        Serial.println("\n Ambi: %i", AmbiValue);
        //mled1 = 0; // LED off, Ambi Data Ready
    }
}