Jie Li / Mbed 2 deprecated BLE_HeartRate

Heart Rate Monitor example for the BLE API using nRF51822 native mode drivers

Dependencies:   BLE_API mbed nRF51822 X_NUCLEO_IDB0XA1

Fork of BLE_HeartRate by Bluetooth Low Energy

main.cpp@27:97adf2b76b9c, 2014-07-03 (annotated)

Committer:
Rohit Grover
Date:
Thu Jul 03 11:52:32 2014 +0100
Revision:
27:97adf2b76b9c
Parent:
26:e6ad33b227c6
Child:
28:bdfc8cc53f0b
add 16-bit UUIDs to the advertising payload; this is cosmetic

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"
ktownsend 0:87a7fc231fae 19
Rohit Grover 10:2436164b692e 20 BLEDevice ble;
Rohit Grover 3:24e2b056d229 21 DigitalOut led1(LED1);
Rohit Grover 9:5d693381e883 22
Rohit Grover 9:5d693381e883 23 #define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console;
Rohit Grover 22:299658c5fa3c 24 * it will have an impact on code-size and power consumption. */
Rohit Grover 9:5d693381e883 25
Rohit Grover 9:5d693381e883 26 #if NEED_CONSOLE_OUTPUT
Rohit Grover 9:5d693381e883 27 Serial pc(USBTX, USBRX);
Rohit Grover 9:5d693381e883 28 #define DEBUG(...) { pc.printf(__VA_ARGS__); }
Rohit Grover 9:5d693381e883 29 #else
Rohit Grover 9:5d693381e883 30 #define DEBUG(...) /* nothing */
Rohit Grover 9:5d693381e883 31 #endif /* #if NEED_CONSOLE_OUTPUT */
ktownsend 0:87a7fc231fae 32
Rohit Grover 26:e6ad33b227c6 33 /* Device Information service */
Rohit Grover 26:e6ad33b227c6 34 const char deviceName[] = { 'm', 'b', 'e', 'd' };
Rohit Grover 26:e6ad33b227c6 35 GattCharacteristic deviceManufacturer(GattCharacteristic::UUID_MANUFACTURER_NAME_STRING_CHAR, (uint8_t *)deviceName, sizeof(deviceName), sizeof(deviceName),
Rohit Grover 26:e6ad33b227c6 36 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ);
Rohit Grover 26:e6ad33b227c6 37 GattCharacteristic *deviceInformationChars[] = {&deviceManufacturer};
Rohit Grover 26:e6ad33b227c6 38 GattService deviceInformationService(GattService::UUID_DEVICE_INFORMATION_SERVICE, deviceInformationChars,
Rohit Grover 26:e6ad33b227c6 39 sizeof(deviceInformationChars) / sizeof(GattCharacteristic *));
Rohit Grover 26:e6ad33b227c6 40
ktownsend 0:87a7fc231fae 41 /* Heart Rate Service */
ktownsend 0:87a7fc231fae 42 /* Service: https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.heart_rate.xml */
ktownsend 0:87a7fc231fae 43 /* HRM Char: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */
ktownsend 0:87a7fc231fae 44 /* Location: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.body_sensor_location.xml */
Rohit Grover 18:8a2e313f49cb 45 static uint8_t hrmCounter = 100;
Rohit Grover 18:8a2e313f49cb 46 static uint8_t bpm[2] = {0x00, hrmCounter};
Rohit Grover 20:58bff62d0f7a 47 GattCharacteristic hrmRate(GattCharacteristic::UUID_HEART_RATE_MEASUREMENT_CHAR, bpm, sizeof(bpm), sizeof(bpm),
Rohit Grover 20:58bff62d0f7a 48 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
Rohit Grover 18:8a2e313f49cb 49 static const uint8_t location = 0x03; /* Finger */
Rohit Grover 18:8a2e313f49cb 50 GattCharacteristic hrmLocation(GattCharacteristic::UUID_BODY_SENSOR_LOCATION_CHAR,
Rohit Grover 18:8a2e313f49cb 51 (uint8_t *)&location, sizeof(location), sizeof(location),
Rohit Grover 18:8a2e313f49cb 52 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ);
Rohit Grover 22:299658c5fa3c 53 GattCharacteristic *hrmChars[] = {&hrmRate, &hrmLocation, };
Rohit Grover 19:1713b11694ea 54 GattService hrmService(GattService::UUID_HEART_RATE_SERVICE, hrmChars, sizeof(hrmChars) / sizeof(GattCharacteristic *));
ktownsend 0:87a7fc231fae 55
Rohit Grover 27:97adf2b76b9c 56 static const uint16_t uuid16_list[] = {GattService::UUID_DEVICE_INFORMATION_SERVICE, GattService::UUID_HEART_RATE_SERVICE};
Rohit Grover 27:97adf2b76b9c 57
rgrover1 7:daab8ba5139e 58 void disconnectionCallback(void)
ktownsend 0:87a7fc231fae 59 {
Rohit Grover 9:5d693381e883 60 DEBUG("Disconnected!\n\r");
Rohit Grover 9:5d693381e883 61 DEBUG("Restarting the advertising process\n\r");
rgrover1 7:daab8ba5139e 62 ble.startAdvertising();
rgrover1 7:daab8ba5139e 63 }
Rohit Grover 3:24e2b056d229 64
Rohit Grover 13:3ca2045597e7 65 /**
Rohit Grover 22:299658c5fa3c 66 * Triggered periodically by the 'ticker' interrupt; updates hrmCounter.
Rohit Grover 13:3ca2045597e7 67 */
Rohit Grover 11:1d9aafee4984 68 void periodicCallback(void)
Rohit Grover 11:1d9aafee4984 69 {
Rohit Grover 11:1d9aafee4984 70 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
Rohit Grover 11:1d9aafee4984 71
Rohit Grover 11:1d9aafee4984 72 if (ble.getGapState().connected) {
Rohit Grover 11:1d9aafee4984 73 /* Update the HRM measurement */
Rohit Grover 11:1d9aafee4984 74 /* First byte = 8-bit values, no extra info, Second byte = uint8_t HRM value */
Rohit Grover 11:1d9aafee4984 75 /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */
Rohit Grover 11:1d9aafee4984 76 hrmCounter++;
Rohit Grover 11:1d9aafee4984 77 if (hrmCounter == 175) {
Rohit Grover 11:1d9aafee4984 78 hrmCounter = 100;
Rohit Grover 11:1d9aafee4984 79 }
Rohit Grover 18:8a2e313f49cb 80 bpm[1] = hrmCounter;
Rohit Grover 11:1d9aafee4984 81 ble.updateCharacteristicValue(hrmRate.getHandle(), bpm, sizeof(bpm));
Rohit Grover 11:1d9aafee4984 82 }
Rohit Grover 11:1d9aafee4984 83 }
Rohit Grover 11:1d9aafee4984 84
ktownsend 0:87a7fc231fae 85 int main(void)
ktownsend 0:87a7fc231fae 86 {
Rohit Grover 3:24e2b056d229 87 led1 = 1;
Rohit Grover 11:1d9aafee4984 88 Ticker ticker;
Rohit Grover 11:1d9aafee4984 89 ticker.attach(periodicCallback, 1);
ktownsend 0:87a7fc231fae 90
Rohit Grover 15:7ba28817e31e 91 DEBUG("Initialising the nRF51822\n\r");
Rohit Grover 15:7ba28817e31e 92 ble.init();
rgrover1 7:daab8ba5139e 93 ble.onDisconnection(disconnectionCallback);
ktownsend 0:87a7fc231fae 94
Rohit Grover 15:7ba28817e31e 95 /* setup advertising */
rgrover1 7:daab8ba5139e 96 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
Rohit Grover 27:97adf2b76b9c 97 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t*)uuid16_list, sizeof(uuid16_list));
rgrover1 7:daab8ba5139e 98 ble.accumulateAdvertisingPayload(GapAdvertisingData::HEART_RATE_SENSOR_HEART_RATE_BELT);
rgrover1 7:daab8ba5139e 99 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
rgrover1 7:daab8ba5139e 100 ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */
rgrover1 7:daab8ba5139e 101 ble.startAdvertising();
Rohit Grover 3:24e2b056d229 102
Rohit Grover 26:e6ad33b227c6 103 ble.addService(deviceInformationService);
Rohit Grover 11:1d9aafee4984 104 ble.addService(hrmService);
ktownsend 0:87a7fc231fae 105
Rohit Grover 11:1d9aafee4984 106 while (true) {
Rohit Grover 11:1d9aafee4984 107 ble.waitForEvent();
ktownsend 0:87a7fc231fae 108 }
ktownsend 0:87a7fc231fae 109 }