Upload MLX90614 Libraries

Libraries/MLX90614_Demo/MLX90614.cpp

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+//////////////////////////////////////////////////////////////////////////
+#include "MLX90614.h"
+#include <Wire.h>
+
+// RAM
+#define MLX90614_RAWIR1  0x04
+#define MLX90614_RAWIR2  0x05
+#define MLX90614_TA      0x06  // Ambient Temperature
+#define MLX90614_TOBJ1   0x07  // Object Temperature 1
+#define MLX90614_TOBJ2   0x08  // Object Temperature 2
+// EEPROM
+#define MLX90614_TOMAX   0x20  // Object Temperature Max.
+#define MLX90614_TOMIN   0x21  // Object Temperature Min.
+#define MLX90614_PWMCTRL 0x22
+#define MLX90614_TARANGE 0x23
+#define MLX90614_EMISS   0x24
+#define MLX90614_CONFIG  0x25
+#define MLX90614_ADDR    0x2E  // I2C Address
+#define MLX90614_ID1     0x3C
+#define MLX90614_ID2     0x3D
+#define MLX90614_ID3     0x3E
+#define MLX90614_ID4     0x3F
+
+static uint8_t _crc8( uint8_t *data, uint16_t len );
+
+using namespace esl;
+
+MLX90614::MLX90614( uint8_t slave_addr )
+  : i2c_addr(slave_addr), crc_error(false)
+{
+   // empty
+}
+
+void MLX90614::init( ) {
+  digitalWrite( SDA, 0 ); // disable pull-up on SDA
+  digitalWrite( SCL, 0 ); // dsiable pull-up on SCL
+}
+
+uint8_t MLX90614::readSlaveAddress() {
+  uint8_t addr = read_reg( MLX90614_ADDR );
+  return addr;
+}
+
+uint16_t MLX90614::read_reg( uint8_t reg_addr ) {
+  uint16_t ret;
+  uint16_t count = 0;
+  crc_error = false;
+  Wire.beginTransmission( i2c_addr );
+  Wire.write( reg_addr );
+  Wire.endTransmission(false);
+  Wire.requestFrom( i2c_addr, (uint8_t) 3 );
+  uint8_t data[6];
+  while( Wire.available() < 3 ) {
+     if ( count++ > 100 ) break;
+     delayMicroseconds(100);
+  } 
+  data[0] = (i2c_addr << 1);
+  data[1] = reg_addr;
+  data[2] = (i2c_addr << 1) | 1;
+  for (uint8_t i=0; i < 3; i++) {
+    data[i+3] = Wire.read();
+  }
+  Wire.endTransmission();
+  ret = data[3];       // low byte
+  ret |= data[4] << 8; // high byte
+  if ( _crc8( data, 5 ) != data[5] ) {
+    // Serial.println( "CRC error!");
+    ret = 0;
+    crc_error = true;
+  }
+  return ret;
+}
+
+float MLX90614::readAmbientTemperature() {
+  //temp = read_reg( MLX90614_TA );
+  //temp *= 0.02; // 0.02 degrees per LSB (measurement resolution of the MLX90614)
+  //temp -= 273.15; // Kelvin
+  uint32_t t = read_reg( MLX90614_TA );
+  return ((t*2) - 27315) /100.0;
+}
+
+float MLX90614::readObjectTemperature() {
+  uint32_t t = read_reg( MLX90614_TOBJ1 );
+  return ((t*2) - 27315) /100.0;
+}
+
+static uint8_t _crc8( uint8_t *data, uint16_t len ) {
+    uint8_t crc = 0x00;
+    uint8_t b;
+    while ( len-- > 0 ) {
+       b = *data++;
+       b = b ^ crc;
+       for (uint8_t i=0; i < 8; i++) {
+         if (b & 0x80)
+            b = (b << 1) ^ 0x07;
+         else
+            b = (b << 1);
+       }
+       crc = b;
+    }
+    return crc;
+}
+//////////////////////////////////////////////////////////////////////////

Libraries/MLX90614_Demo/MLX90614.h

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+//////////////////////////////////////////////////////////////////////////
+// Author: RSP @ Embedded System Lab (ESL), KMUTNB, Thailand
+// File: MAX6675.h
+// Last Modified: 2014-06-24
+// Note:
+//   A C++ class for Arduino that provides methods for read ambient
+//   and object temperature values from the MLX90614 Infrared Thermometer chip.
+//////////////////////////////////////////////////////////////////////////
+#ifndef __MLX90614_H
+#define __MLX90614_H
+
+#include <Arduino.h>
+#include <Wire.h>
+
+namespace esl {
+  class MLX90614 {
+    public:
+      MLX90614( uint8_t slave_addr = 0x5A );
+      void init();
+      uint8_t readSlaveAddress();
+      float readAmbientTemperature();
+      float readObjectTemperature();
+      uint16_t read_reg( uint8_t reg_addr );
+      inline boolean is_crc_error() { return crc_error; }
+
+    private:
+      boolean crc_error;
+      uint8_t i2c_addr;
+
+  }; // end class
+} // end namespace
+
+#endif // __MLX90614_H
+//////////////////////////////////////////////////////////////////////////

Libraries/MLX90614_Demo/MLX90614_Demo.ino

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+//////////////////////////////////////////////////////////////////////////////
+/*
+ * Author: RSP @Embedded System Lab (ESL), KMUTNB, Bangkok/Thailand
+ * Date: 2015-06-11
+ * 
+ * GY-906 MLX90614-BAA (B=3V version, A=single zone, A=filter inside) 
+ * -> Connect Vcc=+3.3V, SDA = A4, SCL = A5, and GND to the Arduino Uno
+ */
+//////////////////////////////////////////////////////////////////////////////
+
+#include <Wire.h>
+#include "MLX90614.h"
+
+esl::MLX90614 mlx90614;
+
+void setup() {
+  Serial.begin(115200);
+  while (!Serial) ;  // for Leonardo or Pro Micro
+  Wire.begin();
+  mlx90614.init( );
+  Serial.print( "Address = 0x" );
+  Serial.println( mlx90614.readSlaveAddress(), HEX );
+}
+
+void loop() {
+  float f;
+  Serial.print( "Ambient temp. (Ta): " );
+  f = mlx90614.readAmbientTemperature(); // ambient temperature
+  if ( !mlx90614.is_crc_error() ) {
+    Serial.println(f);
+  } 
+  Serial.print( "Object1 temp. (To): " );
+  f = mlx90614.readObjectTemperature(); // object1 temperature
+  if ( !mlx90614.is_crc_error() ) {
+    Serial.println(f);
+  } 
+  delay(1000);
+}
+
+//////////////////////////////////////////////////////////////////////////////