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Dependencies:   BLE_API mbed nRF51822

Fork of BLE_HeartRate by Bluetooth Low Energy

main.cpp@50:477004d54431, 2014-11-17 (annotated)

Committer:
rgrover1
Date:
Mon Nov 17 17:53:57 2014 +0000
Revision:
50:477004d54431
Parent:
47:430545f41113
Child:
52:6bbf62943106
add a check for gap-connectedness before polling for sensor data.

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;
rgrover1 47:430545f41113 24 DigitalOut led1(LED1);
ktownsend 0:87a7fc231fae 25
rgrover1 45:98c5a34b07a4 26 const static char DEVICE_NAME[] = "Nordic_HRM";
rgrover1 42:06ebef2e0e44 27 static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE,
rgrover1 42:06ebef2e0e44 28 GattService::UUID_BATTERY_SERVICE,
rgrover1 42:06ebef2e0e44 29 GattService::UUID_DEVICE_INFORMATION_SERVICE};
rgrover1 39:6390604f904c 30 static volatile bool triggerSensorPolling = false;
Rohit Grover 36:ea2a1b4f51c1 31
rgrover1 41:9cef0129da5f 32 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
ktownsend 0:87a7fc231fae 33 {
rgrover1 46:ee7c55907f36 34 ble.startAdvertising(); // restart advertising
rgrover1 7:daab8ba5139e 35 }
Rohit Grover 3:24e2b056d229 36
Rohit Grover 11:1d9aafee4984 37 void periodicCallback(void)
Rohit Grover 11:1d9aafee4984 38 {
rgrover1 47:430545f41113 39 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
rgrover1 47:430545f41113 40
rgrover1 39:6390604f904c 41 /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
rgrover1 39:6390604f904c 42 * heavy-weight sensor polling from the main thread. */
rgrover1 39:6390604f904c 43 triggerSensorPolling = true;
Rohit Grover 11:1d9aafee4984 44 }
Rohit Grover 11:1d9aafee4984 45
ktownsend 0:87a7fc231fae 46 int main(void)
ktownsend 0:87a7fc231fae 47 {
rgrover1 47:430545f41113 48 led1 = 1;
Rohit Grover 11:1d9aafee4984 49 Ticker ticker;
Rohit Grover 11:1d9aafee4984 50 ticker.attach(periodicCallback, 1);
ktownsend 0:87a7fc231fae 51
Rohit Grover 15:7ba28817e31e 52 ble.init();
rgrover1 7:daab8ba5139e 53 ble.onDisconnection(disconnectionCallback);
ktownsend 0:87a7fc231fae 54
rgrover1 45:98c5a34b07a4 55 /* Setup primary service. */
rgrover1 45:98c5a34b07a4 56 uint8_t hrmCounter = 100;
rgrover1 45:98c5a34b07a4 57 HeartRateService hrService(ble, hrmCounter, HeartRateService::LOCATION_FINGER);
rgrover1 45:98c5a34b07a4 58
rgrover1 45:98c5a34b07a4 59 /* Setup auxiliary services. */
rgrover1 45:98c5a34b07a4 60 BatteryService battery(ble);
rgrover1 45:98c5a34b07a4 61 DeviceInformationService deviceInfo(ble, "ARM", "Model1", "SN1", "hw-rev1", "fw-rev1", "soft-rev1");
rgrover1 45:98c5a34b07a4 62
rgrover1 45:98c5a34b07a4 63 /* Setup advertising. */
Rohit Grover 29:76d865c718a6 64 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
rgrover1 40:e73130c6f2bb 65 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
rgrover1 42:06ebef2e0e44 66 ble.accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR);
Rohit Grover 29:76d865c718a6 67 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
rgrover1 7:daab8ba5139e 68 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
rgrover1 40:e73130c6f2bb 69 ble.setAdvertisingInterval(1600); /* 1000ms; in multiples of 0.625ms. */
rgrover1 7:daab8ba5139e 70 ble.startAdvertising();
Rohit Grover 3:24e2b056d229 71
Rohit Grover 11:1d9aafee4984 72 while (true) {
rgrover1 50:477004d54431 73 if (triggerSensorPolling && ble.getGapState().connected) {
Rohit Grover 36:ea2a1b4f51c1 74 triggerSensorPolling = false;
Rohit Grover 36:ea2a1b4f51c1 75
Rohit Grover 36:ea2a1b4f51c1 76 /* Do blocking calls or whatever is necessary for sensor polling. */
Rohit Grover 36:ea2a1b4f51c1 77 /* In our case, we simply update the dummy HRM measurement. */
Rohit Grover 36:ea2a1b4f51c1 78 hrmCounter++;
Rohit Grover 36:ea2a1b4f51c1 79 if (hrmCounter == 175) {
Rohit Grover 36:ea2a1b4f51c1 80 hrmCounter = 100;
Rohit Grover 36:ea2a1b4f51c1 81 }
Rohit Grover 36:ea2a1b4f51c1 82
rgrover1 39:6390604f904c 83 hrService.updateHeartRate(hrmCounter);
Rohit Grover 36:ea2a1b4f51c1 84 } else {
Rohit Grover 36:ea2a1b4f51c1 85 ble.waitForEvent();
Rohit Grover 36:ea2a1b4f51c1 86 }
ktownsend 0:87a7fc231fae 87 }
ktownsend 0:87a7fc231fae 88 }