Pass in wire to begin function

Author: makin-stuff

extras/MLX90614_rev001.pdf renamed to Documents/MLX90614_rev001.pdf

@@ -28,8 +28,14 @@ IRTherm therm; // Create an IRTherm object to interact with throughout
 
 void setup() 
 {
-  Serial.begin(9600); // Initialize Serial to log output
-  therm.begin(); // Initialize the MLX90614
+  Serial.begin(115200); // Initialize Serial to log output
+  Wire.begin(); //Join I2C bus
+  
+  if (therm.begin() == false){ // Initialize the MLX90614
+    Serial.println("Qwiic IR thermometer did not acknowledge! Freezing!");
+    while(1);
+  }
+  Serial.println("Qwiic IR thermometer acknowledged.");
 
   if (therm.readID()) // Read from the ID registers
   { // If the read succeeded, print the ID:

examples/MLX90614_Get_ID/MLX90614_Get_ID.ino

@@ -29,46 +29,40 @@ SparkFun IR Thermometer Evaluation Board - MLX90614
 
 IRTherm therm; // Create an IRTherm object to interact with throughout
 
-const byte LED_PIN = 8; // Optional LED attached to pin 8 (active low)
-
 void setup() 
 {
-  Serial.begin(9600); // Initialize Serial to log output
-  therm.begin(); // Initialize thermal IR sensor
+  Serial.begin(115200); // Initialize Serial to log output
+  Wire.begin(); //Joing I2C bus
+  
+  if (therm.begin() == false){ // Initialize thermal IR sensor
+    Serial.println("Qwiic IR thermometer did not acknowledge! Freezing!");
+    while(1);
+  }
+  Serial.println("Qwiic IR Thermometer did acknowledge.");
+  
   therm.setUnit(TEMP_F); // Set the library's units to Farenheit
   // Alternatively, TEMP_F can be replaced with TEMP_C for Celsius or
   // TEMP_K for Kelvin.
 
-  pinMode(LED_PIN, OUTPUT); // LED pin as output
-  setLED(LOW); // LED OFF
+  pinMode(LED_BUILTIN, OUTPUT); // LED pin as output
 }
 
 void loop() 
 {
-  setLED(HIGH); //LED on
-  
+  digitalWrite(LED_BUILTIN, HIGH);
+    
   // Call therm.read() to read object and ambient temperatures from the sensor.
   if (therm.read()) // On success, read() will return 1, on fail 0.
   {
     // Use the object() and ambient() functions to grab the object and ambient
 	// temperatures.
 	// They'll be floats, calculated out to the unit you set with setUnit().
     Serial.print("Object: " + String(therm.object(), 2));
-    Serial.write('°'); // Degree Symbol
     Serial.println("F");
     Serial.print("Ambient: " + String(therm.ambient(), 2));
-    Serial.write('°'); // Degree Symbol
     Serial.println("F");
     Serial.println();
   }
-  setLED(LOW);
+  digitalWrite(LED_BUILTIN, LOW);
   delay(500);
 }
-
-void setLED(bool on)
-{
-  if (on)
-    digitalWrite(LED_PIN, LOW);
-  else
-    digitalWrite(LED_PIN, HIGH);
-}

examples/MLX90614_Serial_Demo/MLX90614_Serial_Demo.ino

@@ -28,14 +28,20 @@ IRTherm::IRTherm()
 	_rawMin = 0;
 }
 
-uint8_t IRTherm::begin(uint8_t address)
+bool IRTherm::begin(uint8_t address, TwoWire &wirePort)
 {
 	_deviceAddress = address; // Store the address in a private member
+	_i2cPort = &wirePort;
 
-	Wire.begin(); // Initialize I2C
-	//! TODO: read a register, return success only if the register
-	//! produced a known-good value.
-	return 1; // Return success
+	return (isConnected());
+}
+
+bool IRTherm::isConnected()
+{
+	_i2cPort->beginTransmission(_deviceAddress);
+	if (_i2cPort->endTransmission() == 0)
+		return true;
+	return false;
 }
 
 void IRTherm::setUnit(temperature_units unit)
@@ -267,10 +273,10 @@ uint8_t IRTherm::sleep(void)
 	crc = crc8(crc, MLX90614_REGISTER_SLEEP);
 
 	// Manually send the sleep command:
-	Wire.beginTransmission(_deviceAddress);
-	Wire.write(MLX90614_REGISTER_SLEEP);
-	Wire.write(crc);
-	Wire.endTransmission(true);
+	_i2cPort->beginTransmission(_deviceAddress);
+	_i2cPort->write(MLX90614_REGISTER_SLEEP);
+	_i2cPort->write(crc);
+	_i2cPort->endTransmission(true);
 
 	// Set the SCL pin LOW, and SDA pin HIGH (should be pulled up)
 	pinMode(SCL, OUTPUT);
@@ -281,7 +287,7 @@ uint8_t IRTherm::sleep(void)
 uint8_t IRTherm::wake(void)
 {
 	// Wake operation from datasheet
-	Wire.endTransmission(true); // stop i2c bus transmission BEFORE sending wake up request
+	_i2cPort->endTransmission(true); // stop i2c bus transmission BEFORE sending wake up request
 	pinMode(SCL, INPUT); // SCL high
 	pinMode(SDA, OUTPUT);
 	digitalWrite(SDA, LOW); // SDA low
@@ -293,7 +299,7 @@ uint8_t IRTherm::wake(void)
 	digitalWrite(SCL, LOW); // SCL low
 	delay(10); // Delay at least 1.44ms
 	pinMode(SCL, INPUT); // SCL high
-	Wire.beginTransmission(_deviceAddress); // reactivate i2c bus transmission AFTER sending wake up request
+	_i2cPort->beginTransmission(_deviceAddress); // reactivate i2c bus transmission AFTER sending wake up request
 }
 
 int16_t IRTherm::calcRawTemp(float calcTemp)
@@ -355,15 +361,15 @@ float IRTherm::calcTemperature(int16_t rawTemp)
 
 uint8_t IRTherm::I2CReadWord(byte reg, int16_t * dest)
 {
-	Wire.beginTransmission(_deviceAddress);
-	Wire.write(reg);
+	_i2cPort->beginTransmission(_deviceAddress);
+	_i2cPort->write(reg);
 
-	Wire.endTransmission(false); // Send restart
-	Wire.requestFrom(_deviceAddress, (uint8_t) 3);
+	_i2cPort->endTransmission(false); // Send restart
+	_i2cPort->requestFrom(_deviceAddress, (uint8_t) 3);
 
-	uint8_t lsb = Wire.read();
-	uint8_t msb = Wire.read();
-	uint8_t pec = Wire.read();
+	uint8_t lsb = _i2cPort->read();
+	uint8_t msb = _i2cPort->read();
+	uint8_t pec = _i2cPort->read();
 
 	uint8_t crc = crc8(0, (_deviceAddress << 1));
 	crc = crc8(crc, reg);
@@ -409,12 +415,12 @@ uint8_t IRTherm::I2CWriteWord(byte reg, int16_t data)
 	crc = crc8(crc, lsb);
 	crc = crc8(crc, msb);
 
-	Wire.beginTransmission(_deviceAddress);
-	Wire.write(reg);
-	Wire.write(lsb);
-	Wire.write(msb);
-	Wire.write(crc);
-	return Wire.endTransmission(true);
+	_i2cPort->beginTransmission(_deviceAddress);
+	_i2cPort->write(reg);
+	_i2cPort->write(lsb);
+	_i2cPort->write(msb);
+	_i2cPort->write(crc);
+	return _i2cPort->endTransmission(true);
 }
 
 uint8_t IRTherm::crc8 (uint8_t inCrc, uint8_t inData)

src/SparkFunMLX90614.cpp

@@ -24,10 +24,10 @@ SparkFun IR Thermometer Evaluation Board - MLX90614
 // Default I2C PIN for non Atmega Boards //
 ///////////////////////////////////////////
 #ifndef SDA
-#define SDA		(digitalPinToPinName(PIN_WIRE_SDA))
+#define SDA	PIN_WIRE_SDA
 #endif
 #ifndef SCL
-#define SCL		(digitalPinToPinName(PIN_WIRE_SCL))
+#define SCL PIN_WIRE_SCL
 #endif
 
 //////////////////////////////////
@@ -74,7 +74,9 @@ class IRTherm
 	// communication with an MLX90614 device at the specified 7-bit I2C
 	// address.
 	// If no parameter is supplied, the default MLX90614 address is used.
-	uint8_t begin(uint8_t address = MLX90614_DEFAULT_ADDRESS);
+	bool begin(uint8_t address = MLX90614_DEFAULT_ADDRESS, TwoWire &wirePort = Wire);
+
+	bool isConnected();
 
 	// setUnit(<unit>) configures the units returned by the ambient(),
 	// object(), minimum() and maximum() functions, and it determines what
@@ -156,6 +158,8 @@ class IRTherm
 
 private:
 	uint8_t _deviceAddress; // MLX90614's 7-bit I2C address
+	TwoWire *_i2cPort;
+	
 	temperature_units _defaultUnit; // Keeps track of configured temperature unit
 
 	// These keep track of the raw temperature values read from the sensor: