heart rate monitor
Dependencies: BLE_API GroveEarbudSensor mbed nRF51822
Fork of BLE_HeartRate by
main.cpp
- Committer:
- ppm2005
- Date:
- 2015-08-29
- Revision:
- 72:cc9b1d195d9f
- Parent:
- 71:c86b4658af70
- Child:
- 73:32250c7c8e68
File content as of revision 72:cc9b1d195d9f:
/* mbed Microcontroller Library * Copyright (c) 2006-2015 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mbed.h" #include "ble/BLE.h" #include "ble/services/HeartRateService.h" #include "ble/services/BatteryService.h" #include "ble/services/DeviceInformationService.h" // Grove Earbud Sensor include #include "GroveEarbudSensor.h" BLE ble; DigitalOut led1(LED1); // Our sensor as an InterruptIn InterruptIn sensor(P0_0); const static char DEVICE_NAME[] = "HRM1"; static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE, GattService::UUID_DEVICE_INFORMATION_SERVICE}; static volatile bool triggerSensorPolling = false; /* Setup primary service. */ uint8_t hrmCounter = 100; // init HRM to 100bps // callback for receiving heartrate values void heartrateCallback(float heartrate,void *data) { printf("Callback: heartrate = %.1f\r\n",heartrate); // we can also call directly hrmCounter=heartrate; // update bps //hrService.updateHeartRate(hrmCounter); } void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason) { ble.gap().startAdvertising(); // restart advertising } void periodicCallback(void) { led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */ /* Note that the periodicCallback() executes in interrupt context, so it is safer to do * heavy-weight sensor polling from the main thread. */ triggerSensorPolling = true; } int main(void) { led1 = 1; Ticker ticker; ticker.attach(periodicCallback, 1); // blink LED every second ble.init(); ble.gap().onDisconnection(disconnectionCallback); HeartRateService hrService(ble, hrmCounter, HeartRateService::LOCATION_FINGER); /* Setup auxiliary service. */ DeviceInformationService deviceInfo(ble, "ARM", "Model1", "SN1", "hw-rev1", "fw-rev1", "soft-rev1"); /* Setup advertising. */ ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); ble.gap().setAdvertisingInterval(1000); /* 1000ms */ ble.gap().startAdvertising(); // announce printf("Grove Earbud Sensor - Montoring Heart Rate\r\n"); // allocate the earbud sensor printf("Allocating earbud sensor instance...\r\n"); GroveEarbudSensor earbud(&sensor); // register our callback function printf("registering callback...\r\n"); earbud.registerCallback(heartrateCallback); // infinite loop while (1) { // check for trigger from periodicCallback() if (triggerSensorPolling && ble.getGapState().connected) { triggerSensorPolling = false; // Do blocking calls or whatever is necessary for sensor polling. // In our case, we simply update the HRM measurement. // hrmCounter++; // 100 <= HRM bps <=175 /*if (hrmCounter == 175) { hrmCounter = 100; }*/ // blink... led1 = !led1; wait(0.5); hrService.updateHeartRate(hrmCounter); } else { ble.waitForEvent(); // low power wait for event } } }