Diff: main.cpp

Revision:

0:45e5a1daf7c0

Child:

1:e8d3536c7f99

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Sep 25 22:18:42 2014 +0000
@@ -0,0 +1,178 @@
+/* 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 "BLEDevice.h"
+#include "HeartRateService.h"
+
+// ********************* BEGIN Tunables for TechCon 2014
+
+// !!!!IMPORTANT!!!!  CHANGE DEVICE_NAME so that you can find *YOUR* Nordic board in the workshop on your phone!!
+const static char     DEVICE_NAME[]     = "Policeman #1234";                 // what we want to appear as in mBED device server
+
+#define HRM_INCREMENT                     10                                 // increment of HRM per button press (+/-)
+#define HRM_DEFAULT_INIT                  70                                 // default HRM (button only... earbud defaults to offline status)
+#define ENABLE_CONSOLE                    1                                  // 0 - no serial output, 1 - serial output
+
+#define HRM_MIN                           10                                 // min heartrate
+#define HRM_MAX                           250                                // max heartrate
+#define HRM_DEFAULT_INIT                  70                                 // initial heartrate (buttons only, earbud will default differently)
+
+
+// ********************* END Tunables for Techcon 2014
+
+volatile uint16_t     hrmCounter        = HRM_DEFAULT_INIT;                  // initial heartrate 
+int                   oldhrmCounter     = HRM_MAX+1;                         // tracker so that we only send when things change appropriately
+
+// Support for the Grove Ear-Clip Earbud 
+#define USE_EARBUD                        false                              // true - enable (pin P0_0),  false - disable (default) 
+
+// Globals
+BLEDevice  ble;
+DigitalOut led1(LED1);
+volatile bool connected = false;
+
+// Console allocation
+#if ENABLE_CONSOLE
+    Serial  pc(USBTX, USBRX);
+    #define LOG_CONSOLE(...) { pc.printf(__VA_ARGS__); }
+#else
+    #define LOG_CONSOLE(...)
+#endif 
+
+// Earbud allocation (or button usage)
+#if USE_EARBUD
+    #include "GroveEarbudSensor.h"
+    InterruptIn sensor(P0_0);
+    GroveEarbudSensor earbud(&sensor,&pc);
+#else
+    DigitalIn up(BUTTON1);
+    DigitalIn down(BUTTON2);
+#endif
+
+// BLE Globals
+static const uint16_t uuid16_list[]        = {GattService::UUID_HEART_RATE_SERVICE};
+static volatile bool  triggerSensorPolling = false;
+
+// Disconnection callback
+void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason) {
+    LOG_CONSOLE("Disconnected handle %u!\r\n", handle);
+    LOG_CONSOLE("Restarting the advertising process\r\n");
+    ble.startAdvertising();
+    connected = false;
+    oldhrmCounter = HRM_MAX+1;
+#if USE_EARBUD
+    hrmCounter = HEARTRATE_OFF;
+#else
+    hrmCounter = HRM_DEFAULT_INIT;
+#endif
+}
+
+// Connection callback
+void connectionCallback(Gap::Handle_t handle, const Gap::ConnectionParams_t *parms) {
+    LOG_CONSOLE("Endpoint is connected!\r\n");
+    connected = true;
+}
+
+// Periodic callback
+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;
+}
+
+#if USE_EARBUD
+// Heartrate callback (Earbud)
+void heartrateCallback(float heartrate,void *data) {
+    hrmCounter = (int)heartrate;
+}
+#endif
+
+// main entry point
+int main(void) {
+    bool do_loop = true;
+    led1 = 1;
+    Ticker ticker;
+    ticker.attach(periodicCallback, 1);
+
+#if USE_EARBUD
+    LOG_CONSOLE("\r\nmbed PoliceHRM (EARBUD) v1.0 (ARM Techcon 2014)\r\n");
+#else
+    LOG_CONSOLE("\r\nmbed PoliceHRM (BUTTON) v1.0 (ARM Techcon 2014)\r\n");
+#endif
+    ble.init();
+    ble.onDisconnection(disconnectionCallback);
+    ble.onConnection(connectionCallback);
+
+    /* setup advertising */
+    LOG_CONSOLE("Starting BLE Advertising...\r\n");
+    ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
+    ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
+    ble.accumulateAdvertisingPayload(GapAdvertisingData::HEART_RATE_SENSOR_HEART_RATE_BELT);
+    ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
+    ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
+    ble.setAdvertisingInterval(1600); /* 1000ms; in multiples of 0.625ms. */
+    ble.startAdvertising();
+
+#if USE_EARBUD
+    // initialize the earbud
+    LOG_CONSOLE("Initializing Earbud...\r\n");
+    hrmCounter = HEARTRATE_OFF;
+    earbud.registerCallback(heartrateCallback);
+#endif
+
+    // Start the HRM Service
+    LOG_CONSOLE("Starting HRM Service...\r\n");
+#if !USE_EARBUD
+    HeartRateService hrService(ble, hrmCounter, HeartRateService::LOCATION_WRIST);
+#else
+    HeartRateService hrService(ble, hrmCounter, HeartRateService::LOCATION_EAR_LOBE);
+#endif
+     
+    // Loop
+    LOG_CONSOLE("Entering main loop...\r\n");
+    while (do_loop) {
+        if (triggerSensorPolling) {
+            triggerSensorPolling = false;
+
+#if !USE_EARBUD
+            // see if either button was pressed and adjust the heartrate accordingly
+            //LOG_CONSOLE("Updating HRM via button...\r\n");
+            if (up) hrmCounter += HRM_INCREMENT;
+            if (down) hrmCounter -= HRM_INCREMENT;
+            
+            // boundary checking
+            if (hrmCounter <  0) hrmCounter = 0;
+            else if (hrmCounter < HRM_MIN) hrmCounter = HRM_MIN;
+            else if (hrmCounter > HRM_MAX) hrmCounter = HRM_MAX;
+#endif
+
+            // update the heartrate service if it has changed
+            if (hrmCounter != oldhrmCounter) {
+                LOG_CONSOLE("Updating HRM values...%d bpm\r\n",hrmCounter);
+                hrService.updateHeartRate(hrmCounter);
+                if (connected == true) oldhrmCounter = hrmCounter;
+            }
+        } else {
+            ble.waitForEvent();
+        }
+    }
+    
+    // we have exited
+    LOG_CONSOLE("Application exiting...\r\n");
+}
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