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//
I2C는 적당한 풀업저항 사용해야 합니다.
통신속도도 지나치게 빠르게 하면 안됩니다.
적당히 느린 속도로 테스트 하세요 (예제소스의 속도 그대로 테스트하면 됩니다.)

예제도 해봤어요..
/******************************************************************************
 * SparkFun_VL6180X_demo.ino
 * Example Sketch for VL6180x time of flight range finder.
 * Casey Kuhns @ SparkFun Electronics
 * 10/29/2014
 * https://github.com/sparkfun/SparkFun_ToF_Range_Finder-VL6180_Arduino_Library
 *
 * The VL6180x by ST micro is a time of flight range finder that
 * uses pulsed IR light to determine distances from object at close
 * range.  The average range of a sensor is between 0-200mm
 *
 * Resources:
 * This library uses the Arduino Wire.h to complete I2C transactions.
 *
 * Development environment specifics:
 * IDE: Arduino 1.0.5
 * Hardware Platform: Arduino Pro 3.3V/8MHz
 * VL6180x Breakout Version: 1.0
 *  **Updated for Arduino 1.6.4 5/2015**

 *
 * This code is beerware. If you see me (or any other SparkFun employee) at the
 * local pub, and you've found our code helpful, please buy us a round!
 *
 * Distributed as-is; no warranty is given.
 ******************************************************************************/

#include <Wire.h>

#include <SparkFun_VL6180X.h>

/*const float GAIN_1    = 1.01;  // Actual ALS Gain of 1.01
const float GAIN_1_25 = 1.28;  // Actual ALS Gain of 1.28
const float GAIN_1_67 = 1.72;  // Actual ALS Gain of 1.72
const float GAIN_2_5  = 2.6;  // Actual ALS Gain of 2.60
const float GAIN_5    = 5.21;  // Actual ALS Gain of 5.21
const float GAIN_10  = 10.32; // Actual ALS Gain of 10.32
const float GAIN_20  = 20;    // Actual ALS Gain of 20
const float GAIN_40  = 40;    // Actual ALS Gain of 40
*/
#define VL6180X_ADDRESS 0x29

VL6180xIdentification identification;
VL6180x sensor(VL6180X_ADDRESS);

void setup() {

  Serial.begin(115200); //Start Serial at 115200bps
  Wire.begin(); //Start I2C library
  delay(100); // delay .1s

  sensor.getIdentification(&identification); // Retrieve manufacture info from device memory
  printIdentification(&identification); // Helper function to print all the Module information

    if(sensor.VL6180xInit() != 0){
    Serial.println("FAILED TO INITALIZE"); //Initialize device and check for errors
  };

  sensor.VL6180xDefautSettings(); //Load default settings to get started.
 
    delay(1000); // delay 1s


}

void loop() {

  //Get Ambient Light level and report in LUX
  Serial.print("Ambient Light Level (Lux) = ");
 
  //Input GAIN for light levels,
  // GAIN_20    // Actual ALS Gain of 20
  // GAIN_10    // Actual ALS Gain of 10.32
  // GAIN_5      // Actual ALS Gain of 5.21
  // GAIN_2_5    // Actual ALS Gain of 2.60
  // GAIN_1_67  // Actual ALS Gain of 1.72
  // GAIN_1_25  // Actual ALS Gain of 1.28
  // GAIN_1      // Actual ALS Gain of 1.01
  // GAIN_40    // Actual ALS Gain of 40
 
  Serial.println( sensor.getAmbientLight(GAIN_1) );

  //Get Distance and report in mm
  Serial.print("Distance measured (mm) = ");
  Serial.println( sensor.getDistance() );

  delay(500);
};

void printIdentification(struct VL6180xIdentification *temp){
  Serial.print("Model ID = ");
  Serial.println(temp->idModel);

  Serial.print("Model Rev = ");
  Serial.print(temp->idModelRevMajor);
  Serial.print(".");
  Serial.println(temp->idModelRevMinor);

  Serial.print("Module Rev = ");
  Serial.print(temp->idModuleRevMajor);
  Serial.print(".");
  Serial.println(temp->idModuleRevMinor);

  Serial.print("Manufacture Date = ");
  Serial.print((temp->idDate >> 3) & 0x001F);
  Serial.print("/");
  Serial.print((temp->idDate >> 8) & 0x000F);
  Serial.print("/1");
  Serial.print((temp->idDate >> 12) & 0x000F);
  Serial.print(" Phase: ");
  Serial.println(temp->idDate & 0x0007);

  Serial.print("Manufacture Time (s)= ");
  Serial.println(temp->idTime * 2);
  Serial.println();
  Serial.println();
}

위 예제로 했구요. 결과는
FAILED TO INITALIZE
Model ID = 255
Model Rev = 255.255
Module Rev = 255.255
Manufacture Date = 31/15/115 Phase: 7
Manufacture Time (s)= 65534


FAILED TO INITALIZE
Ambient Light Level (Lux) = 31.68
Distance measured (mm) = 255
Ambient Light Level (Lux) = 31.68
Distance measured (mm) = 255
Ambient Light Level (Lux) = 31.68
Distance measured (mm) = 255
Ambient Light Level (Lux) = 31.68
Distance measured (mm) = 255
Ambient Light Level (Lux) = 31.68
Distance measured (mm) = 255
Ambient Light Level (Lux) = 31.68
Distance measured (mm) = 255
Ambient Light Level (Lux) = 31.68
Distance measured (mm) = 255
Ambient Light Level (Lux) = 31.68
(생략)
이런 식으로 똑같은 값만 계속 나오고 있습니다.

master님의 댓글

master 작성일 20-04-29 21:55

오실로스코프를 사용해서 정상적으로 데이터가 얻어지는지 체크해보세요