Merge pull request #39 from caternuson/iss38

Add return to begin()

Author: ladyada

Adafruit_MAX31855.cpp

@@ -77,7 +77,11 @@ Adafruit_MAX31855::Adafruit_MAX31855(int8_t _cs) {
     @return True if the device was successfully initialized, otherwise false.
 */
 /**************************************************************************/
-void Adafruit_MAX31855::begin(void) { initialized = spi_dev.begin(); }
+bool Adafruit_MAX31855::begin(void) {
+  initialized = spi_dev.begin();
+
+  return initialized;
+}
 
 /**************************************************************************/
 /*!

Adafruit_MAX31855.h

@@ -39,7 +39,7 @@ class Adafruit_MAX31855 {
   Adafruit_MAX31855(int8_t _sclk, int8_t _cs, int8_t _miso);
   Adafruit_MAX31855(int8_t _cs);
 
-  void begin(void);
+  bool begin(void);
   double readInternal(void);
   double readCelsius(void);
   double readFahrenheit(void);

examples/lcdthermocouple/lcdthermocouple.ino

@@ -42,6 +42,11 @@ void setup() {
   lcd.print("MAX31855 test");
   // wait for MAX chip to stabilize
   delay(500);
+  if (!thermocouple.begin()) {
+    lcd.print("ERROR.");
+    while (1) delay(10);
+  }
+  lcd.print("DONE.");
 }
 
 void loop() {

examples/serialthermocouple/serialthermocouple.ino

@@ -42,6 +42,12 @@ void setup() {
   Serial.println("MAX31855 test");
   // wait for MAX chip to stabilize
   delay(500);
+  Serial.print("Initializing sensor...");
+  if (!thermocouple.begin()) {
+    Serial.println("ERROR.");
+    while (1) delay(10);
+  }
+  Serial.println("DONE.");
 }
 
 void loop() {