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@39:6390604f904c, 2014-08-22 (annotated)

Committer:
rgrover1
Date:
Fri Aug 22 14:55:52 2014 +0000
Revision:
39:6390604f904c
Parent:
37:d310a72115c7
Child:
40:e73130c6f2bb
Extract HeartRateService as a template to simplify the main application.

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"
ktownsend 0:87a7fc231fae 20
Rohit Grover 10:2436164b692e 21 BLEDevice ble;
Rohit Grover 3:24e2b056d229 22 DigitalOut led1(LED1);
Rohit Grover 9:5d693381e883 23
Rohit Grover 9:5d693381e883 24 #define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console;
Rohit Grover 22:299658c5fa3c 25 * it will have an impact on code-size and power consumption. */
Rohit Grover 9:5d693381e883 26
Rohit Grover 9:5d693381e883 27 #if NEED_CONSOLE_OUTPUT
Rohit Grover 9:5d693381e883 28 Serial pc(USBTX, USBRX);
Rohit Grover 9:5d693381e883 29 #define DEBUG(...) { pc.printf(__VA_ARGS__); }
Rohit Grover 9:5d693381e883 30 #else
Rohit Grover 9:5d693381e883 31 #define DEBUG(...) /* nothing */
Rohit Grover 9:5d693381e883 32 #endif /* #if NEED_CONSOLE_OUTPUT */
ktownsend 0:87a7fc231fae 33
rgrover1 39:6390604f904c 34 const static char DEVICE_NAME[] = "Nordic_HRM";
rgrover1 39:6390604f904c 35 static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE};
rgrover1 39:6390604f904c 36 static volatile bool triggerSensorPolling = false;
Rohit Grover 36:ea2a1b4f51c1 37
Rohit Grover 35:ba3e3174331a 38 void disconnectionCallback(Gap::Handle_t handle)
ktownsend 0:87a7fc231fae 39 {
Rohit Grover 35:ba3e3174331a 40 DEBUG("Disconnected handle %u!\n\r", handle);
Rohit Grover 9:5d693381e883 41 DEBUG("Restarting the advertising process\n\r");
rgrover1 7:daab8ba5139e 42 ble.startAdvertising();
rgrover1 7:daab8ba5139e 43 }
Rohit Grover 3:24e2b056d229 44
Rohit Grover 11:1d9aafee4984 45 void periodicCallback(void)
Rohit Grover 11:1d9aafee4984 46 {
Rohit Grover 11:1d9aafee4984 47 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
rgrover1 39:6390604f904c 48
rgrover1 39:6390604f904c 49 /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
rgrover1 39:6390604f904c 50 * heavy-weight sensor polling from the main thread. */
rgrover1 39:6390604f904c 51 triggerSensorPolling = true;
Rohit Grover 11:1d9aafee4984 52 }
Rohit Grover 11:1d9aafee4984 53
ktownsend 0:87a7fc231fae 54 int main(void)
ktownsend 0:87a7fc231fae 55 {
Rohit Grover 3:24e2b056d229 56 led1 = 1;
Rohit Grover 11:1d9aafee4984 57 Ticker ticker;
Rohit Grover 11:1d9aafee4984 58 ticker.attach(periodicCallback, 1);
ktownsend 0:87a7fc231fae 59
Rohit Grover 15:7ba28817e31e 60 DEBUG("Initialising the nRF51822\n\r");
Rohit Grover 15:7ba28817e31e 61 ble.init();
rgrover1 7:daab8ba5139e 62 ble.onDisconnection(disconnectionCallback);
ktownsend 0:87a7fc231fae 63
Rohit Grover 15:7ba28817e31e 64 /* setup advertising */
Rohit Grover 29:76d865c718a6 65 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
Rohit Grover 27:97adf2b76b9c 66 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t*)uuid16_list, sizeof(uuid16_list));
rgrover1 7:daab8ba5139e 67 ble.accumulateAdvertisingPayload(GapAdvertisingData::HEART_RATE_SENSOR_HEART_RATE_BELT);
Rohit Grover 29:76d865c718a6 68 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
rgrover1 7:daab8ba5139e 69 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
rgrover1 39:6390604f904c 70 ble.setAdvertisingInterval(1600); /* 100ms; in multiples of 0.625ms. */
rgrover1 7:daab8ba5139e 71 ble.startAdvertising();
Rohit Grover 3:24e2b056d229 72
rgrover1 39:6390604f904c 73 uint8_t hrmCounter = 100 ;
rgrover1 39:6390604f904c 74 HeartRateService hrService(ble, hrmCounter, HeartRateService::BLE_HRS_BODY_SENSOR_LOCATION_FINGER);
ktownsend 0:87a7fc231fae 75
Rohit Grover 11:1d9aafee4984 76 while (true) {
Rohit Grover 36:ea2a1b4f51c1 77 if (triggerSensorPolling) {
Rohit Grover 36:ea2a1b4f51c1 78 triggerSensorPolling = false;
Rohit Grover 36:ea2a1b4f51c1 79
Rohit Grover 36:ea2a1b4f51c1 80 /* Do blocking calls or whatever is necessary for sensor polling. */
Rohit Grover 36:ea2a1b4f51c1 81 /* In our case, we simply update the dummy HRM measurement. */
Rohit Grover 36:ea2a1b4f51c1 82 hrmCounter++;
Rohit Grover 36:ea2a1b4f51c1 83 if (hrmCounter == 175) {
Rohit Grover 36:ea2a1b4f51c1 84 hrmCounter = 100;
Rohit Grover 36:ea2a1b4f51c1 85 }
Rohit Grover 36:ea2a1b4f51c1 86
rgrover1 39:6390604f904c 87 hrService.updateHeartRate(hrmCounter);
Rohit Grover 36:ea2a1b4f51c1 88 } else {
Rohit Grover 36:ea2a1b4f51c1 89 ble.waitForEvent();
Rohit Grover 36:ea2a1b4f51c1 90 }
ktownsend 0:87a7fc231fae 91 }
ktownsend 0:87a7fc231fae 92 }