Pei-Ping Mo / Mbed 2 deprecated BLE_HeartRate_ppm

heart rate monitor

Dependencies:   BLE_API GroveEarbudSensor mbed nRF51822

Fork of BLE_HeartRate by Bluetooth Low Energy

main.cpp@0:87a7fc231fae, 2014-03-31 (annotated)

Committer:
ktownsend
Date:
Mon Mar 31 10:28:28 2014 +0000
Revision:
0:87a7fc231fae
Child:
3:24e2b056d229
First commit of HRM example for the BLE API (using nRF51822 native mode drivers)

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"
ktownsend 0:87a7fc231fae 18 #include "nRF51822n.h"
ktownsend 0:87a7fc231fae 19
ktownsend 0:87a7fc231fae 20 nRF51822n nrf; /* BLE radio driver */
ktownsend 0:87a7fc231fae 21
ktownsend 0:87a7fc231fae 22 DigitalOut led1(LED1);
ktownsend 0:87a7fc231fae 23 DigitalOut led2(LED2);
ktownsend 0:87a7fc231fae 24 Ticker flipper;
ktownsend 0:87a7fc231fae 25 Serial pc(USBTX,USBRX);
ktownsend 0:87a7fc231fae 26
ktownsend 0:87a7fc231fae 27 /* Battery Level Service */
ktownsend 0:87a7fc231fae 28 uint8_t batt = 72; /* Battery level */
ktownsend 0:87a7fc231fae 29 uint8_t read_batt = 0; /* Variable to hold battery level reads */
ktownsend 0:87a7fc231fae 30 GattService battService ( GattService::UUID_BATTERY_SERVICE );
ktownsend 0:87a7fc231fae 31 GattCharacteristic battLevel ( GattCharacteristic::UUID_BATTERY_LEVEL_CHAR, 1, 1,
ktownsend 0:87a7fc231fae 32 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY |
ktownsend 0:87a7fc231fae 33 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ);
ktownsend 0:87a7fc231fae 34
ktownsend 0:87a7fc231fae 35 /* Heart Rate Service */
ktownsend 0:87a7fc231fae 36 /* Service: https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.heart_rate.xml */
ktownsend 0:87a7fc231fae 37 /* HRM Char: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */
ktownsend 0:87a7fc231fae 38 /* Location: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.body_sensor_location.xml */
ktownsend 0:87a7fc231fae 39 GattService hrmService ( GattService::UUID_HEART_RATE_SERVICE );
ktownsend 0:87a7fc231fae 40 GattCharacteristic hrmRate ( GattCharacteristic::UUID_HEART_RATE_MEASUREMENT_CHAR, 2, 3, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY );
ktownsend 0:87a7fc231fae 41 GattCharacteristic hrmLocation ( GattCharacteristic::UUID_BODY_SENSOR_LOCATION_CHAR, 1, 1, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ );
ktownsend 0:87a7fc231fae 42
ktownsend 0:87a7fc231fae 43 /* Device Information service */
ktownsend 0:87a7fc231fae 44 uint8_t deviceName[4] = { 'm', 'b', 'e', 'd' };
ktownsend 0:87a7fc231fae 45 GattService deviceInformationService ( GattService::UUID_DEVICE_INFORMATION_SERVICE );
ktownsend 0:87a7fc231fae 46 GattCharacteristic deviceManufacturer ( GattCharacteristic::UUID_MANUFACTURER_NAME_STRING_CHAR,
ktownsend 0:87a7fc231fae 47 sizeof(deviceName), sizeof(deviceName),
ktownsend 0:87a7fc231fae 48 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ);
ktownsend 0:87a7fc231fae 49
ktownsend 0:87a7fc231fae 50 /* Advertising data and parameters */
ktownsend 0:87a7fc231fae 51 GapAdvertisingData advData;
ktownsend 0:87a7fc231fae 52 GapAdvertisingData scanResponse;
ktownsend 0:87a7fc231fae 53 GapAdvertisingParams advParams ( GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED );
ktownsend 0:87a7fc231fae 54 uint16_t uuid16_list[] = { GattService::UUID_BATTERY_SERVICE,
ktownsend 0:87a7fc231fae 55 GattService::UUID_DEVICE_INFORMATION_SERVICE,
ktownsend 0:87a7fc231fae 56 GattService::UUID_HEART_RATE_SERVICE };
ktownsend 0:87a7fc231fae 57
ktownsend 0:87a7fc231fae 58 void tickerCallback(void);
ktownsend 0:87a7fc231fae 59
ktownsend 0:87a7fc231fae 60 /**************************************************************************/
ktownsend 0:87a7fc231fae 61 /*!
ktownsend 0:87a7fc231fae 62 @brief This custom class can be used to override any GapEvents
ktownsend 0:87a7fc231fae 63 that you are interested in handling on an application level.
ktownsend 0:87a7fc231fae 64 */
ktownsend 0:87a7fc231fae 65 /**************************************************************************/
ktownsend 0:87a7fc231fae 66 class GapEventHandler : public GapEvents
ktownsend 0:87a7fc231fae 67 {
ktownsend 0:87a7fc231fae 68 virtual void onTimeout(void)
ktownsend 0:87a7fc231fae 69 {
ktownsend 0:87a7fc231fae 70 pc.printf("Advertising Timeout!\n\r");
ktownsend 0:87a7fc231fae 71 // Restart the advertising process with a much slower interval,
ktownsend 0:87a7fc231fae 72 // only start advertising again after a button press, etc.
ktownsend 0:87a7fc231fae 73 }
ktownsend 0:87a7fc231fae 74
ktownsend 0:87a7fc231fae 75 virtual void onConnected(void)
ktownsend 0:87a7fc231fae 76 {
ktownsend 0:87a7fc231fae 77 pc.printf("Connected!\n\r");
ktownsend 0:87a7fc231fae 78 }
ktownsend 0:87a7fc231fae 79
ktownsend 0:87a7fc231fae 80 virtual void onDisconnected(void)
ktownsend 0:87a7fc231fae 81 {
ktownsend 0:87a7fc231fae 82 pc.printf("Disconnected!\n\r");
ktownsend 0:87a7fc231fae 83 pc.printf("Restarting the advertising process\n\r");
ktownsend 0:87a7fc231fae 84 nrf.getGap().startAdvertising(advParams);
ktownsend 0:87a7fc231fae 85 }
ktownsend 0:87a7fc231fae 86 };
ktownsend 0:87a7fc231fae 87
ktownsend 0:87a7fc231fae 88 /**************************************************************************/
ktownsend 0:87a7fc231fae 89 /*!
ktownsend 0:87a7fc231fae 90 @brief This custom class can be used to override any GattServerEvents
ktownsend 0:87a7fc231fae 91 that you are interested in handling on an application level.
ktownsend 0:87a7fc231fae 92 */
ktownsend 0:87a7fc231fae 93 /**************************************************************************/
ktownsend 0:87a7fc231fae 94 class GattServerEventHandler : public GattServerEvents
ktownsend 0:87a7fc231fae 95 {
ktownsend 0:87a7fc231fae 96 //virtual void onDataSent(uint16_t charHandle) {}
ktownsend 0:87a7fc231fae 97 //virtual void onDataWritten(uint16_t charHandle) {}
ktownsend 0:87a7fc231fae 98
ktownsend 0:87a7fc231fae 99 virtual void onUpdatesEnabled(uint16_t charHandle)
ktownsend 0:87a7fc231fae 100 {
ktownsend 0:87a7fc231fae 101 if (charHandle == hrmRate.handle)
ktownsend 0:87a7fc231fae 102 {
ktownsend 0:87a7fc231fae 103 pc.printf("Heart rate notify enabled\n\r");
ktownsend 0:87a7fc231fae 104 }
ktownsend 0:87a7fc231fae 105 }
ktownsend 0:87a7fc231fae 106
ktownsend 0:87a7fc231fae 107 virtual void onUpdatesDisabled(uint16_t charHandle)
ktownsend 0:87a7fc231fae 108 {
ktownsend 0:87a7fc231fae 109 if (charHandle == hrmRate.handle)
ktownsend 0:87a7fc231fae 110 {
ktownsend 0:87a7fc231fae 111 pc.printf("Heart rate notify disabled\n\r");
ktownsend 0:87a7fc231fae 112 }
ktownsend 0:87a7fc231fae 113 }
ktownsend 0:87a7fc231fae 114
ktownsend 0:87a7fc231fae 115 //virtual void onConfirmationReceived(uint16_t charHandle) {}
ktownsend 0:87a7fc231fae 116 };
ktownsend 0:87a7fc231fae 117
ktownsend 0:87a7fc231fae 118 /**************************************************************************/
ktownsend 0:87a7fc231fae 119 /*!
ktownsend 0:87a7fc231fae 120 @brief Program entry point
ktownsend 0:87a7fc231fae 121 */
ktownsend 0:87a7fc231fae 122 /**************************************************************************/
ktownsend 0:87a7fc231fae 123 int main(void)
ktownsend 0:87a7fc231fae 124 {
ktownsend 0:87a7fc231fae 125 *(uint32_t *)0x40000504 = 0xC007FFDF;
ktownsend 0:87a7fc231fae 126 *(uint32_t *)0x40006C18 = 0x00008000;
ktownsend 0:87a7fc231fae 127
ktownsend 0:87a7fc231fae 128 /* Setup blinky: led1 is toggled in main, led2 is toggled via Ticker */
ktownsend 0:87a7fc231fae 129 led1=1;
ktownsend 0:87a7fc231fae 130 led2=1;
ktownsend 0:87a7fc231fae 131 flipper.attach(&tickerCallback, 1.0);
ktownsend 0:87a7fc231fae 132
ktownsend 0:87a7fc231fae 133 /* Setup the local GAP/GATT event handlers */
ktownsend 0:87a7fc231fae 134 nrf.getGap().setEventHandler(new GapEventHandler());
ktownsend 0:87a7fc231fae 135 nrf.getGattServer().setEventHandler(new GattServerEventHandler());
ktownsend 0:87a7fc231fae 136
ktownsend 0:87a7fc231fae 137 /* Initialise the nRF51822 */
ktownsend 0:87a7fc231fae 138 pc.printf("Initialising the nRF51822\n\r");
ktownsend 0:87a7fc231fae 139 nrf.init();
ktownsend 0:87a7fc231fae 140
ktownsend 0:87a7fc231fae 141 /* Make sure we get a clean start */
ktownsend 0:87a7fc231fae 142 nrf.reset();
ktownsend 0:87a7fc231fae 143
ktownsend 0:87a7fc231fae 144 /* Add BLE-Only flag and complete service list to the advertising data */
ktownsend 0:87a7fc231fae 145 advData.addFlags(GapAdvertisingData::BREDR_NOT_SUPPORTED);
ktownsend 0:87a7fc231fae 146 advData.addData(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS,
ktownsend 0:87a7fc231fae 147 (uint8_t*)uuid16_list, sizeof(uuid16_list));
ktownsend 0:87a7fc231fae 148 advData.addAppearance(GapAdvertisingData::HEART_RATE_SENSOR_HEART_RATE_BELT);
ktownsend 0:87a7fc231fae 149 nrf.getGap().setAdvertisingData(advData, scanResponse);
ktownsend 0:87a7fc231fae 150
ktownsend 0:87a7fc231fae 151 /* Add the Battery Level service */
ktownsend 0:87a7fc231fae 152 battService.addCharacteristic(battLevel);
ktownsend 0:87a7fc231fae 153 nrf.getGattServer().addService(battService);
ktownsend 0:87a7fc231fae 154
ktownsend 0:87a7fc231fae 155 /* Add the Device Information service */
ktownsend 0:87a7fc231fae 156 deviceInformationService.addCharacteristic(deviceManufacturer);
ktownsend 0:87a7fc231fae 157 nrf.getGattServer().addService(deviceInformationService);
ktownsend 0:87a7fc231fae 158
ktownsend 0:87a7fc231fae 159 /* Add the Heart Rate service */
ktownsend 0:87a7fc231fae 160 hrmService.addCharacteristic(hrmRate);
ktownsend 0:87a7fc231fae 161 hrmService.addCharacteristic(hrmLocation);
ktownsend 0:87a7fc231fae 162 nrf.getGattServer().addService(hrmService);
ktownsend 0:87a7fc231fae 163
ktownsend 0:87a7fc231fae 164 /* Start advertising (make sure you've added all your data first) */
ktownsend 0:87a7fc231fae 165 nrf.getGap().startAdvertising(advParams);
ktownsend 0:87a7fc231fae 166
ktownsend 0:87a7fc231fae 167 /* Wait until we are connected to a central device before updating anything */
ktownsend 0:87a7fc231fae 168 pc.printf("Waiting for a connection ...");
ktownsend 0:87a7fc231fae 169 while(!nrf.getGap().state.connected)
ktownsend 0:87a7fc231fae 170 {
ktownsend 0:87a7fc231fae 171 }
ktownsend 0:87a7fc231fae 172 pc.printf("Connected!\n\r");
ktownsend 0:87a7fc231fae 173
ktownsend 0:87a7fc231fae 174 /* Now that we're live, update the battery level characteristic, and */
ktownsend 0:87a7fc231fae 175 /* change the device manufacturer characteristic to 'mbed' */
ktownsend 0:87a7fc231fae 176 nrf.getGattServer().updateValue(battLevel.handle, (uint8_t*)&batt, sizeof(batt));
ktownsend 0:87a7fc231fae 177 nrf.getGattServer().updateValue(deviceManufacturer.handle, deviceName, sizeof(deviceName));
ktownsend 0:87a7fc231fae 178
ktownsend 0:87a7fc231fae 179 /* Set the heart rate monitor location (one time only) */
ktownsend 0:87a7fc231fae 180 /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.body_sensor_location.xml */
ktownsend 0:87a7fc231fae 181 uint8_t location = 0x03; /* Finger */
ktownsend 0:87a7fc231fae 182 uint8_t hrmCounter = 100;
ktownsend 0:87a7fc231fae 183 nrf.getGattServer().updateValue(hrmLocation.handle, (uint8_t*)&location, sizeof(location));
ktownsend 0:87a7fc231fae 184
ktownsend 0:87a7fc231fae 185 /* Do blinky on LED1 while we're waiting for BLE events */
ktownsend 0:87a7fc231fae 186 for (;;)
ktownsend 0:87a7fc231fae 187 {
ktownsend 0:87a7fc231fae 188 led1 = !led1;
ktownsend 0:87a7fc231fae 189 wait(1);
ktownsend 0:87a7fc231fae 190
ktownsend 0:87a7fc231fae 191 /* Update battery level */
ktownsend 0:87a7fc231fae 192 batt++;
ktownsend 0:87a7fc231fae 193 if (batt > 100) batt = 72;
ktownsend 0:87a7fc231fae 194 nrf.getGattServer().updateValue(battLevel.handle, (uint8_t*)&batt, sizeof(batt));
ktownsend 0:87a7fc231fae 195
ktownsend 0:87a7fc231fae 196 /* Update the HRM measurement */
ktownsend 0:87a7fc231fae 197 /* First byte = 8-bit values, no extra info, Second byte = uint8_t HRM value */
ktownsend 0:87a7fc231fae 198 /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */
ktownsend 0:87a7fc231fae 199 hrmCounter++;
ktownsend 0:87a7fc231fae 200 if (hrmCounter == 175) hrmCounter = 100;
ktownsend 0:87a7fc231fae 201 uint8_t bpm[2] = { 0x00, hrmCounter };
ktownsend 0:87a7fc231fae 202 nrf.getGattServer().updateValue(hrmRate.handle, bpm, sizeof(bpm));
ktownsend 0:87a7fc231fae 203 }
ktownsend 0:87a7fc231fae 204 }
ktownsend 0:87a7fc231fae 205
ktownsend 0:87a7fc231fae 206 /**************************************************************************/
ktownsend 0:87a7fc231fae 207 /*!
ktownsend 0:87a7fc231fae 208 @brief Ticker callback to switch led2 state
ktownsend 0:87a7fc231fae 209 */
ktownsend 0:87a7fc231fae 210 /**************************************************************************/
ktownsend 0:87a7fc231fae 211 void tickerCallback(void)
ktownsend 0:87a7fc231fae 212 {
ktownsend 0:87a7fc231fae 213 led2 = !led2;
ktownsend 0:87a7fc231fae 214 }