Cristi Stoican
jgh
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Bluetooth Low Energy
Diff: ble/services/HealthThermometerService.h
- Revision:
- 1131:692ddf04fc42
- Parent:
- 1056:ce2fb3d09929
- Child:
- 1134:d540a48f650d
diff -r ff83f0020480 -r 692ddf04fc42 ble/services/HealthThermometerService.h
--- a/ble/services/HealthThermometerService.h Tue Jan 12 19:47:52 2016 +0000
+++ b/ble/services/HealthThermometerService.h Wed Apr 06 19:13:46 2016 +0100
@@ -1,150 +1,150 @@
-/* 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.
- */
-
-#ifndef __BLE_HEALTH_THERMOMETER_SERVICE_H__
-#define __BLE_HEALTH_THERMOMETER_SERVICE_H__
-
-#include "ble/BLE.h"
-
-/**
-* @class HealthThermometerService
-* @brief BLE Health Thermometer Service. This service provides the location of the thermometer and the temperature.
-* Service: https://developer.bluetooth.org/gatt/profiles/Pages/ProfileViewer.aspx?u=org.bluetooth.profile.health_thermometer.xml
-* Temperature Measurement: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature_measurement.xml
-* Temperature Type: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature_type.xml
-*/
-class HealthThermometerService {
-public:
- /**
- * @enum Sensor Location.
- * @brief Location of sensor on the body.
- */
- enum SensorLocation_t {
- LOCATION_ARMPIT = 1, /*!< Armpit. */
- LOCATION_BODY, /*!< Body. */
- LOCATION_EAR, /*!< Ear. */
- LOCATION_FINGER, /*!< Finger. */
- LOCATION_GI_TRACT, /*!< GI tract */
- LOCATION_MOUTH, /*!< Mouth. */
- LOCATION_RECTUM, /*!< Rectum. */
- LOCATION_TOE, /*!< Toe. */
- LOCATION_EAR_DRUM, /*!< Eardrum. */
- };
-
-public:
- /**
- * @brief Add the Health Thermometer Service to an existing BLE object, initialize with temperature and location.
- * @param[ref] _ble Reference to the BLE device.
- * @param[in] initialTemp Initial value in celsius.
- * @param[in] _location
- */
- HealthThermometerService(BLE &_ble, float initialTemp, uint8_t _location) :
- ble(_ble),
- valueBytes(initialTemp),
- tempMeasurement(GattCharacteristic::UUID_TEMPERATURE_MEASUREMENT_CHAR, (TemperatureValueBytes *)valueBytes.getPointer(), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY),
- tempLocation(GattCharacteristic::UUID_TEMPERATURE_TYPE_CHAR, &_location) {
-
- GattCharacteristic *hrmChars[] = {&tempMeasurement, &tempLocation, };
- GattService hrmService(GattService::UUID_HEALTH_THERMOMETER_SERVICE, hrmChars, sizeof(hrmChars) / sizeof(GattCharacteristic *));
-
- ble.addService(hrmService);
- }
-
- /**
- * @brief Update the temperature being broadcast.
- *
- * @param[in] temperature
- * Floating point value of the temperature.
- *
- */
- void updateTemperature(float temperature) {
- if (ble.getGapState().connected) {
- valueBytes.updateTemperature(temperature);
- ble.gattServer().write(tempMeasurement.getValueHandle(), valueBytes.getPointer(), sizeof(TemperatureValueBytes));
- }
- }
-
- /**
- * @brief Update the location.
- * @param loc
- * New location value.
- */
- void updateLocation(SensorLocation_t loc) {
- ble.gattServer().write(tempLocation.getValueHandle(), reinterpret_cast<uint8_t *>(&loc), sizeof(uint8_t));
- }
-
-private:
- /* Private internal representation for the bytes used to work with the vaulue of the temperature characteristic. */
- struct TemperatureValueBytes {
- static const unsigned OFFSET_OF_FLAGS = 0;
- static const unsigned OFFSET_OF_VALUE = OFFSET_OF_FLAGS + sizeof(uint8_t);
- static const unsigned SIZEOF_VALUE_BYTES = sizeof(uint8_t) + sizeof(float);
-
- static const unsigned TEMPERATURE_UNITS_FLAG_POS = 0;
- static const unsigned TIMESTAMP_FLAG_POS = 1;
- static const unsigned TEMPERATURE_TYPE_FLAG_POS = 2;
-
- static const uint8_t TEMPERATURE_UNITS_CELSIUS = 0;
- static const uint8_t TEMPERATURE_UNITS_FAHRENHEIT = 1;
-
- TemperatureValueBytes(float initialTemperature) : bytes() {
- /* Assumption: temperature values are expressed in celsius */
- bytes[OFFSET_OF_FLAGS] = (TEMPERATURE_UNITS_CELSIUS << TEMPERATURE_UNITS_FLAG_POS) |
- (false << TIMESTAMP_FLAG_POS) |
- (false << TEMPERATURE_TYPE_FLAG_POS);
- updateTemperature(initialTemperature);
- }
-
- void updateTemperature(float temp) {
- uint32_t temp_ieee11073 = quick_ieee11073_from_float(temp);
- memcpy(&bytes[OFFSET_OF_VALUE], &temp_ieee11073, sizeof(float));
- }
-
- uint8_t *getPointer(void) {
- return bytes;
- }
-
- const uint8_t *getPointer(void) const {
- return bytes;
- }
-
-private:
- /**
- * @brief A very quick conversion between a float temperature and 11073-20601 FLOAT-Type.
- * @param temperature The temperature as a float.
- * @return The temperature in 11073-20601 FLOAT-Type format.
- */
- uint32_t quick_ieee11073_from_float(float temperature) {
- uint8_t exponent = 0xFE; //Exponent is -2
- uint32_t mantissa = (uint32_t)(temperature * 100);
-
- return (((uint32_t)exponent) << 24) | mantissa;
- }
-
-private:
- /* First byte: 8-bit flags. Second field is a float holding the temperature value. */
- /* See https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature_measurement.xml */
- uint8_t bytes[SIZEOF_VALUE_BYTES];
- };
-
-protected:
- BLE &ble;
- TemperatureValueBytes valueBytes;
- ReadOnlyGattCharacteristic<TemperatureValueBytes> tempMeasurement;
- ReadOnlyGattCharacteristic<uint8_t> tempLocation;
-};
-
+/* 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.
+ */
+
+#ifndef __BLE_HEALTH_THERMOMETER_SERVICE_H__
+#define __BLE_HEALTH_THERMOMETER_SERVICE_H__
+
+#include "ble/BLE.h"
+
+/**
+* @class HealthThermometerService
+* @brief BLE Health Thermometer Service. This service provides the location of the thermometer and the temperature. <br>
+* Service: https://developer.bluetooth.org/gatt/profiles/Pages/ProfileViewer.aspx?u=org.bluetooth.profile.health_thermometer.xml <br>
+* Temperature Measurement: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature_measurement.xml <br>
+* Temperature Type: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature_type.xml
+*/
+class HealthThermometerService {
+public:
+ /**
+ * @enum Sensor Location
+ * @brief Location of sensor on the body
+ */
+ enum SensorLocation_t {
+ LOCATION_ARMPIT = 1, /*!< armpit */
+ LOCATION_BODY, /*!< body */
+ LOCATION_EAR, /*!< ear */
+ LOCATION_FINGER, /*!< finger */
+ LOCATION_GI_TRACT, /*!< GI tract */
+ LOCATION_MOUTH, /*!< mouth */
+ LOCATION_RECTUM, /*!< rectum */
+ LOCATION_TOE, /*!< toe */
+ LOCATION_EAR_DRUM, /*!< ear drum */
+ };
+
+public:
+ /**
+ * @brief Add the Health Thermometer Service to an existing ble object, initialize with temperature and location.
+ * @param[ref] _ble reference to the BLE device
+ * @param[in] initialTemp initial value in celsius
+ * @param[in] _location
+ */
+ HealthThermometerService(BLE &_ble, float initialTemp, uint8_t _location) :
+ ble(_ble),
+ valueBytes(initialTemp),
+ tempMeasurement(GattCharacteristic::UUID_TEMPERATURE_MEASUREMENT_CHAR, (TemperatureValueBytes *)valueBytes.getPointer(), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY),
+ tempLocation(GattCharacteristic::UUID_TEMPERATURE_TYPE_CHAR, &_location) {
+
+ GattCharacteristic *hrmChars[] = {&tempMeasurement, &tempLocation, };
+ GattService hrmService(GattService::UUID_HEALTH_THERMOMETER_SERVICE, hrmChars, sizeof(hrmChars) / sizeof(GattCharacteristic *));
+
+ ble.addService(hrmService);
+ }
+
+ /**
+ * @brief Update the temperature being broadcast
+ *
+ * @param[in] temperature
+ * Floating point value of the temperature
+ *
+ */
+ void updateTemperature(float temperature) {
+ if (ble.getGapState().connected) {
+ valueBytes.updateTemperature(temperature);
+ ble.gattServer().write(tempMeasurement.getValueHandle(), valueBytes.getPointer(), sizeof(TemperatureValueBytes));
+ }
+ }
+
+ /**
+ * @brief Update the location.
+ * @param loc
+ * new location value.
+ */
+ void updateLocation(SensorLocation_t loc) {
+ ble.gattServer().write(tempLocation.getValueHandle(), reinterpret_cast<uint8_t *>(&loc), sizeof(uint8_t));
+ }
+
+private:
+ /* Private internal representation for the bytes used to work with the vaulue of the heart-rate characteristic. */
+ struct TemperatureValueBytes {
+ static const unsigned OFFSET_OF_FLAGS = 0;
+ static const unsigned OFFSET_OF_VALUE = OFFSET_OF_FLAGS + sizeof(uint8_t);
+ static const unsigned SIZEOF_VALUE_BYTES = sizeof(uint8_t) + sizeof(float);
+
+ static const unsigned TEMPERATURE_UNITS_FLAG_POS = 0;
+ static const unsigned TIMESTAMP_FLAG_POS = 1;
+ static const unsigned TEMPERATURE_TYPE_FLAG_POS = 2;
+
+ static const uint8_t TEMPERATURE_UNITS_CELSIUS = 0;
+ static const uint8_t TEMPERATURE_UNITS_FAHRENHEIT = 1;
+
+ TemperatureValueBytes(float initialTemperature) : bytes() {
+ /* assumption: temperature values are expressed in Celsius */
+ bytes[OFFSET_OF_FLAGS] = (TEMPERATURE_UNITS_CELSIUS << TEMPERATURE_UNITS_FLAG_POS) |
+ (false << TIMESTAMP_FLAG_POS) |
+ (false << TEMPERATURE_TYPE_FLAG_POS);
+ updateTemperature(initialTemperature);
+ }
+
+ void updateTemperature(float temp) {
+ uint32_t temp_ieee11073 = quick_ieee11073_from_float(temp);
+ memcpy(&bytes[OFFSET_OF_VALUE], &temp_ieee11073, sizeof(float));
+ }
+
+ uint8_t *getPointer(void) {
+ return bytes;
+ }
+
+ const uint8_t *getPointer(void) const {
+ return bytes;
+ }
+
+private:
+ /**
+ * @brief A very quick conversion between a float temperature and 11073-20601 FLOAT-Type.
+ * @param temperature The temperature as a float.
+ * @return The temperature in 11073-20601 FLOAT-Type format.
+ */
+ uint32_t quick_ieee11073_from_float(float temperature) {
+ uint8_t exponent = 0xFE; //exponent is -2
+ uint32_t mantissa = (uint32_t)(temperature * 100);
+
+ return (((uint32_t)exponent) << 24) | mantissa;
+ }
+
+private:
+ /* First byte = 8-bit flags, Second field is a float holding the temperature value. */
+ /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature_measurement.xml */
+ uint8_t bytes[SIZEOF_VALUE_BYTES];
+ };
+
+protected:
+ BLE &ble;
+ TemperatureValueBytes valueBytes;
+ ReadOnlyGattCharacteristic<TemperatureValueBytes> tempMeasurement;
+ ReadOnlyGattCharacteristic<uint8_t> tempLocation;
+};
+
#endif /* #ifndef __BLE_HEALTH_THERMOMETER_SERVICE_H__*/
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