Bluetooth Low Energy / Mbed 2 deprecated BLE_Button

A template for applications where some small amount of data needs to be notified to a phone app over BLE. It is a good starting point for notifications.

Dependencies:   BLE_API mbed nRF51822

Demo for an Input Service

To help you create your own BLE services, we've created a series of service templates. The *input service template* demonstrates the use of a simple input (boolean values) from a read-only characteristic.

The template covers:

1. Setting up advertising and connection states.

2. Assigning UUIDs to the service and its characteristic.

3. Creating an input characteristic: read-only, boolean, with notifications. This characteristic is updated according to the button's state.

4. Constructing a service class and adding it to the BLE stack.

Files at this revision

API Documentation at this revision

Revision 10:7943b5c1117a, committed 2015-12-30

Comitter:
andresag
Date:
Wed Dec 30 09:54:06 2015 +0000
Parent:
9:0f6951db24f1
Commit message:
Update example to comply with latest BLE API changes.

Changed in this revision

BLE_API.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file
nRF51822.lib Show annotated file Show diff for this revision Revisions of this file 
--- a/BLE_API.lib	Fri Oct 09 13:37:52 2015 +0000
+++ b/BLE_API.lib	Wed Dec 30 09:54:06 2015 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/teams/Bluetooth-Low-Energy/code/BLE_API/#d494ad3e87bd
+http://mbed.org/teams/Bluetooth-Low-Energy/code/BLE_API/#bfc5b9b6ecf5

--- a/main.cpp	Fri Oct 09 13:37:52 2015 +0000
+++ b/main.cpp	Wed Dec 30 09:54:06 2015 +0000
@@ -15,10 +15,9 @@
  */
 
 #include "mbed.h"
-#include "BLE.h"
+#include "ble/BLE.h"
 #include "ButtonService.h"
 
-BLE         ble;
 DigitalOut  led1(LED1);
 InterruptIn button(BUTTON1);
 
@@ -32,7 +31,7 @@
 };
 static uint8_t buttonState = IDLE;
 
-ButtonService *buttonServicePtr;
+static ButtonService *buttonServicePtr;
 
 void buttonPressedCallback(void)
 {
@@ -50,7 +49,7 @@
 
 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
 {
-    ble.gap().startAdvertising();
+    BLE::Instance().gap().startAdvertising();
 }
 
 void periodicCallback(void)
@@ -58,6 +57,48 @@
     led1 = !led1; /* Do blinky on LED1 to indicate system aliveness. */
 }
 
+/**
+ * This function is called when the ble initialization process has failled
+ */
+void onBleInitError(BLE &ble, ble_error_t error)
+{
+    /* Initialization error handling should go here */
+}
+
+/**
+ * Callback triggered when the ble initialization process has finished
+ */
+void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
+{
+    BLE&        ble   = params->ble;
+    ble_error_t error = params->error;
+
+    if (error != BLE_ERROR_NONE) {
+        /* In case of error, forward the error handling to onBleInitError */
+        onBleInitError(ble, error);
+        return;
+    }
+
+    /* Ensure that it is the default instance of BLE */
+    if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
+        return;
+    }
+
+    ble.gap().onDisconnection(disconnectionCallback);
+
+    /* Setup primary service */
+    buttonServicePtr = new ButtonService(ble, false /* initial value for button pressed */);
+
+    /* setup advertising */
+    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
+    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
+    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
+    ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
+    ble.gap().setAdvertisingInterval(1000); /* 1000ms. */
+    ble.gap().startAdvertising();
+
+}
+
 int main(void)
 {
     led1 = 1;
@@ -66,22 +107,15 @@
     button.fall(buttonPressedCallback);
     button.rise(buttonReleasedCallback);
 
-    ble.init();
-    ble.gap().onDisconnection(disconnectionCallback);
-
-    ButtonService buttonService(ble, false /* initial value for button pressed */);
-    buttonServicePtr = &buttonService;
-
-    /* setup advertising */
-    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
-    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
-    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
-    ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
-    ble.gap().setAdvertisingInterval(1000); /* 1000ms. */
-    ble.gap().startAdvertising();
-
+    BLE &ble = BLE::Instance();
+    ble.init(bleInitComplete);
+    
+    /* SpinWait for initialization to complete. This is necessary because the
+     * BLE object is used in the main loop below. */
+    while (ble.hasInitialized()  == false) { /* spin loop */ }
+    
     while (true) {
-        if (buttonState!=IDLE) {
+        if (buttonState != IDLE) {
             buttonServicePtr->updateButtonState(buttonState);
             buttonState = IDLE;
         }

--- a/mbed.bld	Fri Oct 09 13:37:52 2015 +0000
+++ b/mbed.bld	Wed Dec 30 09:54:06 2015 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/mbed/builds/34e6b704fe68
\ No newline at end of file
+http://mbed.org/users/mbed_official/code/mbed/builds/4336505e4b1c
\ No newline at end of file

--- a/nRF51822.lib	Fri Oct 09 13:37:52 2015 +0000
+++ b/nRF51822.lib	Wed Dec 30 09:54:06 2015 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#088f5738bf18
+http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#3cc0718d98d0