BLE heart rate example, with yotta machinations.
Dependencies: BLE_API mbed nRF51822
Fork of BLE_HeartRate by
main.cpp@66:c09ddf226b9c, 2015-06-20 (annotated)
- Committer:
- rgrover1
- Date:
- Sat Jun 20 23:25:02 2015 +0000
- Revision:
- 66:c09ddf226b9c
- Parent:
- 65:cb76569f74f6
switch to newer APIs; rename BLEDevice to BLE
Who changed what in which revision?
User | Revision | Line number | New 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" |
rgrover1 | 65:cb76569f74f6 | 18 | #include "BLE.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 | |
rgrover1 | 66:c09ddf226b9c | 28 | BLE 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 | 66:c09ddf226b9c | 38 | ble.gap().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 | 65:cb76569f74f6 | 57 | ble.gap().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. */ |
rgrover1 | 65:cb76569f74f6 | 67 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); |
rgrover1 | 65:cb76569f74f6 | 68 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); |
rgrover1 | 65:cb76569f74f6 | 69 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR); |
rgrover1 | 65:cb76569f74f6 | 70 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); |
rgrover1 | 65:cb76569f74f6 | 71 | ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); |
rgrover1 | 65:cb76569f74f6 | 72 | ble.gap().setAdvertisingInterval(1000); |
rgrover1 | 65:cb76569f74f6 | 73 | ble.gap().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 | } |