microbit-dal: added #define to determine BLE usage

NO_BLE can now be defined to determine whether ble
will be brought up or not at initialisation of uBit.
This is especially useful for two new Yotta targets:
bbc-microbit-classic-gcc-nosd,
bbc-microbit-classic-armcc-nosd, which do not use
softdevice.

inc/MicroBit.h

@@ -5,7 +5,11 @@
 //#define MICROBIT_DBG
 
 #include "mbed.h"
+
+#ifndef NO_BLE
 #include "ble/BLE.h"
+#endif
+
 #include "ble/services/DeviceInformationService.h"
 
 //error number enumeration

source/MicroBit.cpp

@@ -24,7 +24,6 @@ void bleDisconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t r
     uBit.ble->startAdvertising(); // restart advertising!
 }
 
-
 /**
   * Constructor. 
   * Create a representation of a MicroBit device as a global singleton.
@@ -88,6 +87,7 @@ void MicroBit::init()
     // Seed our random number generator
     seedRandom();
 
+#ifndef NO_BLE
     // Start the BLE stack.        
     ble = new BLEDevice();
     
@@ -108,6 +108,12 @@ void MicroBit::init()
     ble->setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
     ble->setAdvertisingInterval(Gap::MSEC_TO_ADVERTISEMENT_DURATION_UNITS(1000));
     ble->startAdvertising();  
+#else
+    ble = NULL;
+    ble_firmware_update_service = NULL;
+    ble_device_information_service = NULL;
+    ble_event_service = NULL;
+#endif
 
     // Start refreshing the Matrix Display
     systemTicker.attach(this, &MicroBit::systemTick, MICROBIT_DISPLAY_REFRESH_PERIOD);     

source/MicroBitSuperMain.cpp

@@ -54,7 +54,8 @@ int main()
     uBit.init();
     
     uBit.sleep(100);
-    
+
+#ifndef NO_BLE
     // Test if we need to enter BLE pairing mode...
     int i=0;
     while (uBit.buttonA.isPressed() && uBit.buttonB.isPressed() && i<10)
@@ -65,6 +66,7 @@ int main()
         if (i == 10 && uBit.ble_firmware_update_service != NULL)
             uBit.ble_firmware_update_service->pair();
     }
+#endif
         
     app_main();