Diff: source/main.cpp

Revision:

67:50317bbc805f

Parent:

66:c09ddf226b9c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/main.cpp	Fri Jun 26 11:53:48 2015 +0000
@@ -0,0 +1,96 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed.h"
+#include "ble/BLE.h"
+#include "ble/services/HeartRateService.h"
+#include "ble/services/DeviceInformationService.h"
+
+/* Enable the following if you need to throttle the connection interval. This has
+ * the effect of reducing energy consumption after a connection is made;
+ * particularly for applications where the central may want a fast connection
+ * interval.*/
+#define UPDATE_PARAMS_FOR_LONGER_CONNECTION_INTERVAL 0
+
+BLE        ble;
+DigitalOut led1(LED1);
+
+const static char     DEVICE_NAME[]        = "HRM1";
+static const uint16_t uuid16_list[]        = {GattService::UUID_HEART_RATE_SERVICE,
+                                              GattService::UUID_DEVICE_INFORMATION_SERVICE};
+static volatile bool  triggerSensorPolling = false;
+
+void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
+{
+    ble.gap().startAdvertising(); // restart advertising
+}
+
+void periodicCallback(void)
+{
+    led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
+
+    /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
+     * heavy-weight sensor polling from the main thread. */
+    triggerSensorPolling = true;
+}
+
+int main(void)
+{
+    led1 = 1;
+    Ticker ticker;
+    ticker.attach(periodicCallback, 1); // blink LED every second
+
+    ble.init();
+    ble.gap().onDisconnection(disconnectionCallback);
+
+    /* Setup primary service. */
+    uint8_t hrmCounter = 100; // init HRM to 100bps
+    HeartRateService hrService(ble, hrmCounter, HeartRateService::LOCATION_FINGER);
+
+    /* Setup auxiliary service. */
+    DeviceInformationService deviceInfo(ble, "ARM", "Model1", "SN1", "hw-rev1", "fw-rev1", "soft-rev1");
+
+    /* 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::GENERIC_HEART_RATE_SENSOR);
+    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);
+    ble.gap().startAdvertising();
+
+    // infinite loop
+    while (1) {
+        // check for trigger from periodicCallback()
+        if (triggerSensorPolling && ble.getGapState().connected) {
+            triggerSensorPolling = false;
+
+            // Do blocking calls or whatever is necessary for sensor polling.
+            // In our case, we simply update the HRM measurement. 
+            hrmCounter++;
+            
+            //  100 <= HRM bps <=175
+            if (hrmCounter == 175) {
+                hrmCounter = 100;
+            }
+            
+            // update bps
+            hrService.updateHeartRate(hrmCounter);
+        } else {
+            ble.waitForEvent(); // low power wait for event
+        }
+    }
+}