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@53:06a74fd722b8, 2014-11-28 (annotated)

Committer:
rgrover1
Date:
Fri Nov 28 14:15:43 2014 +0000
Revision:
53:06a74fd722b8
Parent:
52:6bbf62943106
Child:
55:3a7d497a3e03
Updating to 0.2.5 of BLE_API

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
rgrover1 52:6bbf62943106 23 /* Enable the following if you need to throttle the connection interval. This has
rgrover1 52:6bbf62943106 24 * the effect of reducing energy consumption after a connection is made;
rgrover1 52:6bbf62943106 25 * particularly for applications where the central may want a fast connection
rgrover1 52:6bbf62943106 26 * interval.*/
rgrover1 52:6bbf62943106 27 #define UPDATE_PARAMS_FOR_LONGER_CONNECTION_INTERVAL 0
rgrover1 52:6bbf62943106 28
Rohit Grover 10:2436164b692e 29 BLEDevice ble;
rgrover1 47:430545f41113 30 DigitalOut led1(LED1);
ktownsend 0:87a7fc231fae 31
rgrover1 45:98c5a34b07a4 32 const static char DEVICE_NAME[] = "Nordic_HRM";
rgrover1 42:06ebef2e0e44 33 static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE,
rgrover1 42:06ebef2e0e44 34 GattService::UUID_BATTERY_SERVICE,
rgrover1 42:06ebef2e0e44 35 GattService::UUID_DEVICE_INFORMATION_SERVICE};
rgrover1 39:6390604f904c 36 static volatile bool triggerSensorPolling = false;
Rohit Grover 36:ea2a1b4f51c1 37
rgrover1 41:9cef0129da5f 38 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
ktownsend 0:87a7fc231fae 39 {
rgrover1 46:ee7c55907f36 40 ble.startAdvertising(); // restart advertising
rgrover1 7:daab8ba5139e 41 }
Rohit Grover 3:24e2b056d229 42
rgrover1 52:6bbf62943106 43 void onConnectionCallback(Gap::Handle_t handle, Gap::addr_type_t peerAddrType, const Gap::address_t peerAddr, const Gap::ConnectionParams_t *params)
rgrover1 52:6bbf62943106 44 {
rgrover1 52:6bbf62943106 45 #if UPDATE_PARAMS_FOR_LONGER_CONNECTION_INTERVAL
rgrover1 52:6bbf62943106 46 /* Updating connection parameters can be attempted only after a connection has been
rgrover1 52:6bbf62943106 47 * established. Please note that the ble-Central is still the final arbiter for
rgrover1 52:6bbf62943106 48 * the effective parameters; the peripheral can only hope that the request is
rgrover1 52:6bbf62943106 49 * honored. Please also be mindful of the constraints that might be enforced by
rgrover1 52:6bbf62943106 50 * the BLE stack on the underlying controller.*/
rgrover1 52:6bbf62943106 51 #define MIN_CONN_INTERVAL 250 /**< Minimum connection interval (250 ms) */
rgrover1 52:6bbf62943106 52 #define MAX_CONN_INTERVAL 350 /**< Maximum connection interval (350 ms). */
rgrover1 52:6bbf62943106 53 #define CONN_SUP_TIMEOUT 6000 /**< Connection supervisory timeout (6 seconds). */
rgrover1 52:6bbf62943106 54 #define SLAVE_LATENCY 4
rgrover1 52:6bbf62943106 55
rgrover1 52:6bbf62943106 56 Gap::ConnectionParams_t gap_conn_params;
rgrover1 52:6bbf62943106 57 gap_conn_params.minConnectionInterval = Gap::MSEC_TO_GAP_DURATION_UNITS(MIN_CONN_INTERVAL);
rgrover1 52:6bbf62943106 58 gap_conn_params.maxConnectionInterval = Gap::MSEC_TO_GAP_DURATION_UNITS(MAX_CONN_INTERVAL);
rgrover1 52:6bbf62943106 59 gap_conn_params.connectionSupervisionTimeout = Gap::MSEC_TO_GAP_DURATION_UNITS(CONN_SUP_TIMEOUT);
rgrover1 52:6bbf62943106 60 gap_conn_params.slaveLatency = SLAVE_LATENCY;
rgrover1 52:6bbf62943106 61 ble.updateConnectionParams(handle, &gap_conn_params);
rgrover1 52:6bbf62943106 62 #endif /* #if UPDATE_PARAMS_FOR_LONGER_CONNECTION_INTERVAL */
rgrover1 52:6bbf62943106 63 }
rgrover1 52:6bbf62943106 64
Rohit Grover 11:1d9aafee4984 65 void periodicCallback(void)
Rohit Grover 11:1d9aafee4984 66 {
rgrover1 47:430545f41113 67 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
rgrover1 47:430545f41113 68
rgrover1 39:6390604f904c 69 /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
rgrover1 39:6390604f904c 70 * heavy-weight sensor polling from the main thread. */
rgrover1 39:6390604f904c 71 triggerSensorPolling = true;
Rohit Grover 11:1d9aafee4984 72 }
Rohit Grover 11:1d9aafee4984 73
ktownsend 0:87a7fc231fae 74 int main(void)
ktownsend 0:87a7fc231fae 75 {
rgrover1 47:430545f41113 76 led1 = 1;
Rohit Grover 11:1d9aafee4984 77 Ticker ticker;
Rohit Grover 11:1d9aafee4984 78 ticker.attach(periodicCallback, 1);
ktownsend 0:87a7fc231fae 79
Rohit Grover 15:7ba28817e31e 80 ble.init();
rgrover1 7:daab8ba5139e 81 ble.onDisconnection(disconnectionCallback);
rgrover1 52:6bbf62943106 82 #if UPDATE_PARAMS_FOR_LONGER_CONNECTION_INTERVAL
rgrover1 52:6bbf62943106 83 ble.onConnection(onConnectionCallback);
rgrover1 52:6bbf62943106 84 #endif /* #if UPDATE_PARAMS_FOR_LONGER_CONNECTION_INTERVAL */
ktownsend 0:87a7fc231fae 85
rgrover1 45:98c5a34b07a4 86 /* Setup primary service. */
rgrover1 45:98c5a34b07a4 87 uint8_t hrmCounter = 100;
rgrover1 45:98c5a34b07a4 88 HeartRateService hrService(ble, hrmCounter, HeartRateService::LOCATION_FINGER);
rgrover1 45:98c5a34b07a4 89
rgrover1 45:98c5a34b07a4 90 /* Setup auxiliary services. */
rgrover1 45:98c5a34b07a4 91 BatteryService battery(ble);
rgrover1 45:98c5a34b07a4 92 DeviceInformationService deviceInfo(ble, "ARM", "Model1", "SN1", "hw-rev1", "fw-rev1", "soft-rev1");
rgrover1 45:98c5a34b07a4 93
rgrover1 45:98c5a34b07a4 94 /* Setup advertising. */
Rohit Grover 29:76d865c718a6 95 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
rgrover1 40:e73130c6f2bb 96 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
rgrover1 42:06ebef2e0e44 97 ble.accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR);
Rohit Grover 29:76d865c718a6 98 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
rgrover1 7:daab8ba5139e 99 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
rgrover1 53:06a74fd722b8 100 ble.setAdvertisingInterval(Gap::MSEC_TO_ADVERTISEMENT_DURATION_UNITS(1000));
rgrover1 7:daab8ba5139e 101 ble.startAdvertising();
Rohit Grover 3:24e2b056d229 102
Rohit Grover 11:1d9aafee4984 103 while (true) {
rgrover1 50:477004d54431 104 if (triggerSensorPolling && ble.getGapState().connected) {
Rohit Grover 36:ea2a1b4f51c1 105 triggerSensorPolling = false;
Rohit Grover 36:ea2a1b4f51c1 106
Rohit Grover 36:ea2a1b4f51c1 107 /* Do blocking calls or whatever is necessary for sensor polling. */
Rohit Grover 36:ea2a1b4f51c1 108 /* In our case, we simply update the dummy HRM measurement. */
Rohit Grover 36:ea2a1b4f51c1 109 hrmCounter++;
Rohit Grover 36:ea2a1b4f51c1 110 if (hrmCounter == 175) {
Rohit Grover 36:ea2a1b4f51c1 111 hrmCounter = 100;
Rohit Grover 36:ea2a1b4f51c1 112 }
Rohit Grover 36:ea2a1b4f51c1 113
rgrover1 39:6390604f904c 114 hrService.updateHeartRate(hrmCounter);
Rohit Grover 36:ea2a1b4f51c1 115 } else {
Rohit Grover 36:ea2a1b4f51c1 116 ble.waitForEvent();
Rohit Grover 36:ea2a1b4f51c1 117 }
ktownsend 0:87a7fc231fae 118 }
ktownsend 0:87a7fc231fae 119 }