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Techcon 2014 BLE sample Police HRM (button-based) for Nordic
Dependencies: BLE_API BufferedSerial mbed nRF51822
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Diff: main.cpp
- Revision:
- 0:45e5a1daf7c0
- Child:
- 1:e8d3536c7f99
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Thu Sep 25 22:18:42 2014 +0000 @@ -0,0 +1,178 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 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 "BLEDevice.h" +#include "HeartRateService.h" + +// ********************* BEGIN Tunables for TechCon 2014 + +// !!!!IMPORTANT!!!! CHANGE DEVICE_NAME so that you can find *YOUR* Nordic board in the workshop on your phone!! +const static char DEVICE_NAME[] = "Policeman #1234"; // what we want to appear as in mBED device server + +#define HRM_INCREMENT 10 // increment of HRM per button press (+/-) +#define HRM_DEFAULT_INIT 70 // default HRM (button only... earbud defaults to offline status) +#define ENABLE_CONSOLE 1 // 0 - no serial output, 1 - serial output + +#define HRM_MIN 10 // min heartrate +#define HRM_MAX 250 // max heartrate +#define HRM_DEFAULT_INIT 70 // initial heartrate (buttons only, earbud will default differently) + + +// ********************* END Tunables for Techcon 2014 + +volatile uint16_t hrmCounter = HRM_DEFAULT_INIT; // initial heartrate +int oldhrmCounter = HRM_MAX+1; // tracker so that we only send when things change appropriately + +// Support for the Grove Ear-Clip Earbud +#define USE_EARBUD false // true - enable (pin P0_0), false - disable (default) + +// Globals +BLEDevice ble; +DigitalOut led1(LED1); +volatile bool connected = false; + +// Console allocation +#if ENABLE_CONSOLE + Serial pc(USBTX, USBRX); + #define LOG_CONSOLE(...) { pc.printf(__VA_ARGS__); } +#else + #define LOG_CONSOLE(...) +#endif + +// Earbud allocation (or button usage) +#if USE_EARBUD + #include "GroveEarbudSensor.h" + InterruptIn sensor(P0_0); + GroveEarbudSensor earbud(&sensor,&pc); +#else + DigitalIn up(BUTTON1); + DigitalIn down(BUTTON2); +#endif + +// BLE Globals +static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE}; +static volatile bool triggerSensorPolling = false; + +// Disconnection callback +void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason) { + LOG_CONSOLE("Disconnected handle %u!\r\n", handle); + LOG_CONSOLE("Restarting the advertising process\r\n"); + ble.startAdvertising(); + connected = false; + oldhrmCounter = HRM_MAX+1; +#if USE_EARBUD + hrmCounter = HEARTRATE_OFF; +#else + hrmCounter = HRM_DEFAULT_INIT; +#endif +} + +// Connection callback +void connectionCallback(Gap::Handle_t handle, const Gap::ConnectionParams_t *parms) { + LOG_CONSOLE("Endpoint is connected!\r\n"); + connected = true; +} + +// Periodic callback +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; +} + +#if USE_EARBUD +// Heartrate callback (Earbud) +void heartrateCallback(float heartrate,void *data) { + hrmCounter = (int)heartrate; +} +#endif + +// main entry point +int main(void) { + bool do_loop = true; + led1 = 1; + Ticker ticker; + ticker.attach(periodicCallback, 1); + +#if USE_EARBUD + LOG_CONSOLE("\r\nmbed PoliceHRM (EARBUD) v1.0 (ARM Techcon 2014)\r\n"); +#else + LOG_CONSOLE("\r\nmbed PoliceHRM (BUTTON) v1.0 (ARM Techcon 2014)\r\n"); +#endif + ble.init(); + ble.onDisconnection(disconnectionCallback); + ble.onConnection(connectionCallback); + + /* setup advertising */ + LOG_CONSOLE("Starting BLE Advertising...\r\n"); + ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); + ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); + ble.accumulateAdvertisingPayload(GapAdvertisingData::HEART_RATE_SENSOR_HEART_RATE_BELT); + ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); + ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); + ble.setAdvertisingInterval(1600); /* 1000ms; in multiples of 0.625ms. */ + ble.startAdvertising(); + +#if USE_EARBUD + // initialize the earbud + LOG_CONSOLE("Initializing Earbud...\r\n"); + hrmCounter = HEARTRATE_OFF; + earbud.registerCallback(heartrateCallback); +#endif + + // Start the HRM Service + LOG_CONSOLE("Starting HRM Service...\r\n"); +#if !USE_EARBUD + HeartRateService hrService(ble, hrmCounter, HeartRateService::LOCATION_WRIST); +#else + HeartRateService hrService(ble, hrmCounter, HeartRateService::LOCATION_EAR_LOBE); +#endif + + // Loop + LOG_CONSOLE("Entering main loop...\r\n"); + while (do_loop) { + if (triggerSensorPolling) { + triggerSensorPolling = false; + +#if !USE_EARBUD + // see if either button was pressed and adjust the heartrate accordingly + //LOG_CONSOLE("Updating HRM via button...\r\n"); + if (up) hrmCounter += HRM_INCREMENT; + if (down) hrmCounter -= HRM_INCREMENT; + + // boundary checking + if (hrmCounter < 0) hrmCounter = 0; + else if (hrmCounter < HRM_MIN) hrmCounter = HRM_MIN; + else if (hrmCounter > HRM_MAX) hrmCounter = HRM_MAX; +#endif + + // update the heartrate service if it has changed + if (hrmCounter != oldhrmCounter) { + LOG_CONSOLE("Updating HRM values...%d bpm\r\n",hrmCounter); + hrService.updateHeartRate(hrmCounter); + if (connected == true) oldhrmCounter = hrmCounter; + } + } else { + ble.waitForEvent(); + } + } + + // we have exited + LOG_CONSOLE("Application exiting...\r\n"); +} \ No newline at end of file