James Crosby / Mbed 2 deprecated BLE_HeartRate

BLE heart rate example, with yotta machinations.

Dependencies:   BLE_API mbed nRF51822

Fork of BLE_HeartRate by Bluetooth Low Energy

main.cpp@56:83623419d5e4, 2015-03-24 (annotated)

Committer:
rgrover1
Date:
Tue Mar 24 08:07:25 2015 +0000
Revision:
56:83623419d5e4
Parent:
55:3a7d497a3e03
Child:
65:cb76569f74f6
updating underlying libraries

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 "DeviceInformationService.h"
ktownsend 0:87a7fc231fae 21
rgrover1 52:6bbf62943106 22 /* Enable the following if you need to throttle the connection interval. This has
rgrover1 52:6bbf62943106 23 * the effect of reducing energy consumption after a connection is made;
rgrover1 52:6bbf62943106 24 * particularly for applications where the central may want a fast connection
rgrover1 52:6bbf62943106 25 * interval.*/
rgrover1 52:6bbf62943106 26 #define UPDATE_PARAMS_FOR_LONGER_CONNECTION_INTERVAL 0
rgrover1 52:6bbf62943106 27
Rohit Grover 10:2436164b692e 28 BLEDevice ble;
rgrover1 47:430545f41113 29 DigitalOut led1(LED1);
ktownsend 0:87a7fc231fae 30
mbedAustin 55:3a7d497a3e03 31 const static char DEVICE_NAME[] = "HRM1";
rgrover1 42:06ebef2e0e44 32 static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE,
rgrover1 42:06ebef2e0e44 33 GattService::UUID_DEVICE_INFORMATION_SERVICE};
rgrover1 39:6390604f904c 34 static volatile bool triggerSensorPolling = false;
Rohit Grover 36:ea2a1b4f51c1 35
rgrover1 41:9cef0129da5f 36 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
ktownsend 0:87a7fc231fae 37 {
rgrover1 46:ee7c55907f36 38 ble.startAdvertising(); // restart advertising
rgrover1 7:daab8ba5139e 39 }
Rohit Grover 3:24e2b056d229 40
Rohit Grover 11:1d9aafee4984 41 void periodicCallback(void)
Rohit Grover 11:1d9aafee4984 42 {
rgrover1 47:430545f41113 43 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
rgrover1 47:430545f41113 44
rgrover1 39:6390604f904c 45 /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
rgrover1 39:6390604f904c 46 * heavy-weight sensor polling from the main thread. */
rgrover1 39:6390604f904c 47 triggerSensorPolling = true;
Rohit Grover 11:1d9aafee4984 48 }
Rohit Grover 11:1d9aafee4984 49
ktownsend 0:87a7fc231fae 50 int main(void)
ktownsend 0:87a7fc231fae 51 {
rgrover1 47:430545f41113 52 led1 = 1;
Rohit Grover 11:1d9aafee4984 53 Ticker ticker;
mbedAustin 55:3a7d497a3e03 54 ticker.attach(periodicCallback, 1); // blink LED every second
ktownsend 0:87a7fc231fae 55
Rohit Grover 15:7ba28817e31e 56 ble.init();
rgrover1 7:daab8ba5139e 57 ble.onDisconnection(disconnectionCallback);
ktownsend 0:87a7fc231fae 58
rgrover1 45:98c5a34b07a4 59 /* Setup primary service. */
mbedAustin 55:3a7d497a3e03 60 uint8_t hrmCounter = 100; // init HRM to 100bps
rgrover1 45:98c5a34b07a4 61 HeartRateService hrService(ble, hrmCounter, HeartRateService::LOCATION_FINGER);
rgrover1 45:98c5a34b07a4 62
mbedAustin 55:3a7d497a3e03 63 /* Setup auxiliary service. */
rgrover1 45:98c5a34b07a4 64 DeviceInformationService deviceInfo(ble, "ARM", "Model1", "SN1", "hw-rev1", "fw-rev1", "soft-rev1");
rgrover1 45:98c5a34b07a4 65
rgrover1 45:98c5a34b07a4 66 /* Setup advertising. */
Rohit Grover 29:76d865c718a6 67 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
rgrover1 40:e73130c6f2bb 68 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
rgrover1 42:06ebef2e0e44 69 ble.accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR);
Rohit Grover 29:76d865c718a6 70 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
rgrover1 7:daab8ba5139e 71 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
rgrover1 56:83623419d5e4 72 ble.setAdvertisingInterval(1000);
rgrover1 7:daab8ba5139e 73 ble.startAdvertising();
Rohit Grover 3:24e2b056d229 74
mbedAustin 55:3a7d497a3e03 75 // infinite loop
mbedAustin 55:3a7d497a3e03 76 while (1) {
mbedAustin 55:3a7d497a3e03 77 // check for trigger from periodicCallback()
rgrover1 50:477004d54431 78 if (triggerSensorPolling && ble.getGapState().connected) {
Rohit Grover 36:ea2a1b4f51c1 79 triggerSensorPolling = false;
Rohit Grover 36:ea2a1b4f51c1 80
mbedAustin 55:3a7d497a3e03 81 // Do blocking calls or whatever is necessary for sensor polling.
mbedAustin 55:3a7d497a3e03 82 // In our case, we simply update the HRM measurement.
Rohit Grover 36:ea2a1b4f51c1 83 hrmCounter++;
mbedAustin 55:3a7d497a3e03 84
mbedAustin 55:3a7d497a3e03 85 // 100 <= HRM bps <=175
Rohit Grover 36:ea2a1b4f51c1 86 if (hrmCounter == 175) {
Rohit Grover 36:ea2a1b4f51c1 87 hrmCounter = 100;
Rohit Grover 36:ea2a1b4f51c1 88 }
mbedAustin 55:3a7d497a3e03 89
mbedAustin 55:3a7d497a3e03 90 // update bps
rgrover1 39:6390604f904c 91 hrService.updateHeartRate(hrmCounter);
Rohit Grover 36:ea2a1b4f51c1 92 } else {
mbedAustin 55:3a7d497a3e03 93 ble.waitForEvent(); // low power wait for event
Rohit Grover 36:ea2a1b4f51c1 94 }
ktownsend 0:87a7fc231fae 95 }
ktownsend 0:87a7fc231fae 96 }