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
Diff: main.cpp
- Revision:
- 22:299658c5fa3c
- Parent:
- 20:58bff62d0f7a
- Child:
- 26:e6ad33b227c6
--- a/main.cpp Wed Jun 11 14:52:56 2014 +0100 +++ b/main.cpp Thu Jun 12 08:12:51 2014 +0100 @@ -18,12 +18,10 @@ #include "BLEDevice.h" BLEDevice ble; - DigitalOut led1(LED1); #define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console; - * it will have an impact on code-size and power - * consumption. */ + * it will have an impact on code-size and power consumption. */ #if NEED_CONSOLE_OUTPUT Serial pc(USBTX, USBRX); @@ -32,15 +30,6 @@ #define DEBUG(...) /* nothing */ #endif /* #if NEED_CONSOLE_OUTPUT */ -/* Battery Level Service */ -uint8_t batt = 72; /* Battery level */ -GattCharacteristic battLevel (GattCharacteristic::UUID_BATTERY_LEVEL_CHAR, &batt, sizeof(batt), sizeof(batt), - GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ); -GattCharacteristic *battChars[] = { - &battLevel, -}; -GattService battService (GattService::UUID_BATTERY_SERVICE, battChars, sizeof(battChars) / sizeof(GattCharacteristic *)); - /* Heart Rate Service */ /* Service: https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.heart_rate.xml */ /* HRM Char: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */ @@ -53,28 +42,9 @@ GattCharacteristic hrmLocation(GattCharacteristic::UUID_BODY_SENSOR_LOCATION_CHAR, (uint8_t *)&location, sizeof(location), sizeof(location), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ); -GattCharacteristic *hrmChars[] = { - &hrmRate, &hrmLocation, -}; +GattCharacteristic *hrmChars[] = {&hrmRate, &hrmLocation, }; GattService hrmService(GattService::UUID_HEART_RATE_SERVICE, hrmChars, sizeof(hrmChars) / sizeof(GattCharacteristic *)); -/* Device Information service */ -static const uint8_t deviceName[] = {'m', 'b', 'e', 'd'}; -GattCharacteristic deviceManufacturer (GattCharacteristic::UUID_MANUFACTURER_NAME_STRING_CHAR, - (uint8_t *)deviceName, sizeof(deviceName), sizeof(deviceName), - GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ); -GattCharacteristic *devInfoChars[] = { - &deviceManufacturer, -}; -GattService deviceInformationService (GattService::UUID_DEVICE_INFORMATION_SERVICE, - devInfoChars, sizeof(devInfoChars) / sizeof(GattCharacteristic *)); - -static const uint16_t uuid16_list[] = { - GattService::UUID_BATTERY_SERVICE, - GattService::UUID_DEVICE_INFORMATION_SERVICE, - GattService::UUID_HEART_RATE_SERVICE -}; - void disconnectionCallback(void) { DEBUG("Disconnected!\n\r"); @@ -83,21 +53,13 @@ } /** - * Runs once a second in interrupt context triggered by the 'ticker'; updates - * battery level and hrmCounter if there is a connection. + * Triggered periodically by the 'ticker' interrupt; updates hrmCounter. */ void periodicCallback(void) { led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */ if (ble.getGapState().connected) { - /* Update battery level */ - batt++; - if (batt > 100) { - batt = 72; - } - ble.updateCharacteristicValue(battLevel.getHandle(), (uint8_t *)&batt, sizeof(batt)); - /* Update the HRM measurement */ /* First byte = 8-bit values, no extra info, Second byte = uint8_t HRM value */ /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */ @@ -118,20 +80,15 @@ DEBUG("Initialising the nRF51822\n\r"); ble.init(); - - /* Setup the local GAP/GATT event handlers */ ble.onDisconnection(disconnectionCallback); /* setup advertising */ ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED); - 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.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */ ble.startAdvertising(); - ble.addService(deviceInformationService); - ble.addService(battService); ble.addService(hrmService); while (true) {