Merge pull request #30 from udo-munk/master

conditional compile debug output

Adafruit_FRAM_SPI.cpp

@@ -34,6 +34,9 @@
 
 #include "Adafruit_FRAM_SPI.h"
 
+/// Enable debug output
+#define FRAM_DEBUG 0
+
 /// Supported flash devices
 const struct {
   uint8_t manufID;    ///< Manufacture ID
@@ -152,15 +155,21 @@ bool Adafruit_FRAM_SPI::begin(uint8_t nAddressSizeBytes) {
   _dev_idx = get_supported_idx(manufID, prodID);
 
   if (_dev_idx == -1) {
+#if FRAM_DEBUG
     Serial.print(F("Unexpected Device: Manufacturer ID = 0x"));
     Serial.print(manufID, HEX);
     Serial.print(F(", Product ID = 0x"));
     Serial.println(prodID, HEX);
+#endif
+
     return false;
   } else {
-    uint32_t fram_size = _supported_devices[_dev_idx].size;
+    uint32_t const fram_size = _supported_devices[_dev_idx].size;
+
+#if FRAM_DEBUG
     Serial.print(F("FRAM Size = 0x"));
     Serial.println(fram_size, HEX);
+#endif
 
     // Detect address size in bytes either 2 or 3 bytes (4 bytes is not
     // supported)