heart rate monitor

Dependencies:   BLE_API GroveEarbudSensor mbed nRF51822

Fork of BLE_HeartRate by Bluetooth Low Energy

Committer:
rgrover1
Date:
Tue Sep 23 15:04:58 2014 +0000
Revision:
43:dbb025ed4a55
Parent:
42:06ebef2e0e44
Child:
45:98c5a34b07a4
minor update to advertising payload; and fleshing out Device Information Service.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ktownsend 0:87a7fc231fae 1 /* mbed Microcontroller Library
ktownsend 0:87a7fc231fae 2 * Copyright (c) 2006-2013 ARM Limited
ktownsend 0:87a7fc231fae 3 *
ktownsend 0:87a7fc231fae 4 * Licensed under the Apache License, Version 2.0 (the "License");
ktownsend 0:87a7fc231fae 5 * you may not use this file except in compliance with the License.
ktownsend 0:87a7fc231fae 6 * You may obtain a copy of the License at
ktownsend 0:87a7fc231fae 7 *
ktownsend 0:87a7fc231fae 8 * http://www.apache.org/licenses/LICENSE-2.0
ktownsend 0:87a7fc231fae 9 *
ktownsend 0:87a7fc231fae 10 * Unless required by applicable law or agreed to in writing, software
ktownsend 0:87a7fc231fae 11 * distributed under the License is distributed on an "AS IS" BASIS,
ktownsend 0:87a7fc231fae 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ktownsend 0:87a7fc231fae 13 * See the License for the specific language governing permissions and
ktownsend 0:87a7fc231fae 14 * limitations under the License.
ktownsend 0:87a7fc231fae 15 */
ktownsend 0:87a7fc231fae 16
ktownsend 0:87a7fc231fae 17 #include "mbed.h"
Rohit Grover 10:2436164b692e 18 #include "BLEDevice.h"
rgrover1 39:6390604f904c 19 #include "HeartRateService.h"
rgrover1 42:06ebef2e0e44 20 #include "BatteryService.h"
rgrover1 42:06ebef2e0e44 21 #include "DeviceInformationService.h"
ktownsend 0:87a7fc231fae 22
Rohit Grover 10:2436164b692e 23 BLEDevice ble;
Rohit Grover 3:24e2b056d229 24 DigitalOut led1(LED1);
Rohit Grover 9:5d693381e883 25
Rohit Grover 9:5d693381e883 26 #define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console;
Rohit Grover 22:299658c5fa3c 27 * it will have an impact on code-size and power consumption. */
Rohit Grover 9:5d693381e883 28
Rohit Grover 9:5d693381e883 29 #if NEED_CONSOLE_OUTPUT
Rohit Grover 9:5d693381e883 30 Serial pc(USBTX, USBRX);
Rohit Grover 9:5d693381e883 31 #define DEBUG(...) { pc.printf(__VA_ARGS__); }
Rohit Grover 9:5d693381e883 32 #else
Rohit Grover 9:5d693381e883 33 #define DEBUG(...) /* nothing */
Rohit Grover 9:5d693381e883 34 #endif /* #if NEED_CONSOLE_OUTPUT */
ktownsend 0:87a7fc231fae 35
rgrover1 43:dbb025ed4a55 36 const static char DEVICE_NAME[] = "HRMonitor";
rgrover1 42:06ebef2e0e44 37 static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE,
rgrover1 42:06ebef2e0e44 38 GattService::UUID_BATTERY_SERVICE,
rgrover1 42:06ebef2e0e44 39 GattService::UUID_DEVICE_INFORMATION_SERVICE};
rgrover1 39:6390604f904c 40 static volatile bool triggerSensorPolling = false;
Rohit Grover 36:ea2a1b4f51c1 41
rgrover1 41:9cef0129da5f 42 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
ktownsend 0:87a7fc231fae 43 {
Rohit Grover 35:ba3e3174331a 44 DEBUG("Disconnected handle %u!\n\r", handle);
Rohit Grover 9:5d693381e883 45 DEBUG("Restarting the advertising process\n\r");
rgrover1 7:daab8ba5139e 46 ble.startAdvertising();
rgrover1 7:daab8ba5139e 47 }
Rohit Grover 3:24e2b056d229 48
Rohit Grover 11:1d9aafee4984 49 void periodicCallback(void)
Rohit Grover 11:1d9aafee4984 50 {
Rohit Grover 11:1d9aafee4984 51 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
rgrover1 39:6390604f904c 52
rgrover1 39:6390604f904c 53 /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
rgrover1 39:6390604f904c 54 * heavy-weight sensor polling from the main thread. */
rgrover1 39:6390604f904c 55 triggerSensorPolling = true;
Rohit Grover 11:1d9aafee4984 56 }
Rohit Grover 11:1d9aafee4984 57
ktownsend 0:87a7fc231fae 58 int main(void)
ktownsend 0:87a7fc231fae 59 {
Rohit Grover 3:24e2b056d229 60 led1 = 1;
Rohit Grover 11:1d9aafee4984 61 Ticker ticker;
Rohit Grover 11:1d9aafee4984 62 ticker.attach(periodicCallback, 1);
ktownsend 0:87a7fc231fae 63
Rohit Grover 15:7ba28817e31e 64 DEBUG("Initialising the nRF51822\n\r");
Rohit Grover 15:7ba28817e31e 65 ble.init();
rgrover1 7:daab8ba5139e 66 ble.onDisconnection(disconnectionCallback);
ktownsend 0:87a7fc231fae 67
Rohit Grover 15:7ba28817e31e 68 /* setup advertising */
Rohit Grover 29:76d865c718a6 69 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
rgrover1 40:e73130c6f2bb 70 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
rgrover1 42:06ebef2e0e44 71 ble.accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR);
Rohit Grover 29:76d865c718a6 72 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
rgrover1 7:daab8ba5139e 73 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
rgrover1 40:e73130c6f2bb 74 ble.setAdvertisingInterval(1600); /* 1000ms; in multiples of 0.625ms. */
rgrover1 7:daab8ba5139e 75 ble.startAdvertising();
Rohit Grover 3:24e2b056d229 76
rgrover1 40:e73130c6f2bb 77 uint8_t hrmCounter = 100;
rgrover1 41:9cef0129da5f 78 HeartRateService hrService(ble, hrmCounter, HeartRateService::LOCATION_FINGER);
rgrover1 42:06ebef2e0e44 79 BatteryService battery(ble);
rgrover1 43:dbb025ed4a55 80 DeviceInformationService deviceInfo(ble, "ARM", "Model1", "SN1", "hw-rev1", "fw-rev1", "soft-rev1");
rgrover1 42:06ebef2e0e44 81
Rohit Grover 11:1d9aafee4984 82 while (true) {
Rohit Grover 36:ea2a1b4f51c1 83 if (triggerSensorPolling) {
Rohit Grover 36:ea2a1b4f51c1 84 triggerSensorPolling = false;
Rohit Grover 36:ea2a1b4f51c1 85
Rohit Grover 36:ea2a1b4f51c1 86 /* Do blocking calls or whatever is necessary for sensor polling. */
Rohit Grover 36:ea2a1b4f51c1 87 /* In our case, we simply update the dummy HRM measurement. */
Rohit Grover 36:ea2a1b4f51c1 88 hrmCounter++;
Rohit Grover 36:ea2a1b4f51c1 89 if (hrmCounter == 175) {
Rohit Grover 36:ea2a1b4f51c1 90 hrmCounter = 100;
Rohit Grover 36:ea2a1b4f51c1 91 }
Rohit Grover 36:ea2a1b4f51c1 92
rgrover1 39:6390604f904c 93 hrService.updateHeartRate(hrmCounter);
Rohit Grover 36:ea2a1b4f51c1 94 } else {
Rohit Grover 36:ea2a1b4f51c1 95 ble.waitForEvent();
Rohit Grover 36:ea2a1b4f51c1 96 }
ktownsend 0:87a7fc231fae 97 }
ktownsend 0:87a7fc231fae 98 }