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services/HealthThermometerService.h@123:d2cdf4ebe524, 2014-10-10 (annotated)
- Committer:
- jakerosenthal@gmail.com
- Date:
- Fri Oct 10 17:32:22 2014 -0700
- Branch:
- 2chains
- Revision:
- 123:d2cdf4ebe524
- Parent:
- 118:620d28e7a1ba
first attempt at chaining onconnect and ondisconnect
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Rohit Grover |
118:620d28e7a1ba | 1 | /* mbed Microcontroller Library |
Rohit Grover |
118:620d28e7a1ba | 2 | * Copyright (c) 2006-2013 ARM Limited |
Rohit Grover |
118:620d28e7a1ba | 3 | * |
Rohit Grover |
118:620d28e7a1ba | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
Rohit Grover |
118:620d28e7a1ba | 5 | * you may not use this file except in compliance with the License. |
Rohit Grover |
118:620d28e7a1ba | 6 | * You may obtain a copy of the License at |
Rohit Grover |
118:620d28e7a1ba | 7 | * |
Rohit Grover |
118:620d28e7a1ba | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
Rohit Grover |
118:620d28e7a1ba | 9 | * |
Rohit Grover |
118:620d28e7a1ba | 10 | * Unless required by applicable law or agreed to in writing, software |
Rohit Grover |
118:620d28e7a1ba | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
Rohit Grover |
118:620d28e7a1ba | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
Rohit Grover |
118:620d28e7a1ba | 13 | * See the License for the specific language governing permissions and |
Rohit Grover |
118:620d28e7a1ba | 14 | * limitations under the License. |
Rohit Grover |
118:620d28e7a1ba | 15 | */ |
Rohit Grover |
118:620d28e7a1ba | 16 | |
Rohit Grover |
118:620d28e7a1ba | 17 | #ifndef __BLE_HEALTH_THERMOMETER_SERVICE_H__ |
Rohit Grover |
118:620d28e7a1ba | 18 | #define __BLE_HEALTH_THERMOMETER_SERVICE_H__ |
Rohit Grover |
118:620d28e7a1ba | 19 | |
Rohit Grover |
118:620d28e7a1ba | 20 | #include "BLEDevice.h" |
Rohit Grover |
118:620d28e7a1ba | 21 | |
Rohit Grover |
118:620d28e7a1ba | 22 | /* Health Thermometer Service */ |
Rohit Grover |
118:620d28e7a1ba | 23 | /* Service: https://developer.bluetooth.org/gatt/profiles/Pages/ProfileViewer.aspx?u=org.bluetooth.profile.health_thermometer.xml */ |
Rohit Grover |
118:620d28e7a1ba | 24 | /* Temperature Measurement: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature_measurement.xml */ |
Rohit Grover |
118:620d28e7a1ba | 25 | /* Temperature Type: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature_type.xml */ |
Rohit Grover |
118:620d28e7a1ba | 26 | class HealthThermometerService { |
Rohit Grover |
118:620d28e7a1ba | 27 | public: |
Rohit Grover |
118:620d28e7a1ba | 28 | enum { |
Rohit Grover |
118:620d28e7a1ba | 29 | LOCATION_ARMPIT = 1, |
Rohit Grover |
118:620d28e7a1ba | 30 | LOCATION_BODY, |
Rohit Grover |
118:620d28e7a1ba | 31 | LOCATION_EAR, |
Rohit Grover |
118:620d28e7a1ba | 32 | LOCATION_FINGER, |
Rohit Grover |
118:620d28e7a1ba | 33 | LOCATION_GI_TRACT, |
Rohit Grover |
118:620d28e7a1ba | 34 | LOCATION_MOUTH, |
Rohit Grover |
118:620d28e7a1ba | 35 | LOCATION_RECTUM, |
Rohit Grover |
118:620d28e7a1ba | 36 | LOCATION_TOE, |
Rohit Grover |
118:620d28e7a1ba | 37 | LOCATION_EAR_DRUM, |
Rohit Grover |
118:620d28e7a1ba | 38 | }; |
Rohit Grover |
118:620d28e7a1ba | 39 | |
Rohit Grover |
118:620d28e7a1ba | 40 | public: |
Rohit Grover |
118:620d28e7a1ba | 41 | |
Rohit Grover |
118:620d28e7a1ba | 42 | /** |
Rohit Grover |
118:620d28e7a1ba | 43 | * @param[in] _ble reference to the BLE device |
Rohit Grover |
118:620d28e7a1ba | 44 | * @param[in] initialTemp initial value in celsius |
Rohit Grover |
118:620d28e7a1ba | 45 | * @param[in] _location |
Rohit Grover |
118:620d28e7a1ba | 46 | */ |
Rohit Grover |
118:620d28e7a1ba | 47 | HealthThermometerService(BLEDevice &_ble, float initialTemp, uint8_t _location) : |
Rohit Grover |
118:620d28e7a1ba | 48 | ble(_ble), |
Rohit Grover |
118:620d28e7a1ba | 49 | valueBytes(initialTemp), |
Rohit Grover |
118:620d28e7a1ba | 50 | tempMeasurement(GattCharacteristic::UUID_TEMPERATURE_MEASUREMENT_CHAR, valueBytes.getPointer(), |
Rohit Grover |
118:620d28e7a1ba | 51 | sizeof(TemperatureValueBytes), sizeof(TemperatureValueBytes), |
Rohit Grover |
118:620d28e7a1ba | 52 | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY), |
Rohit Grover |
118:620d28e7a1ba | 53 | tempLocation(GattCharacteristic::UUID_TEMPERATURE_TYPE_CHAR, (uint8_t *)&_location, sizeof(_location), sizeof(_location), |
Rohit Grover |
118:620d28e7a1ba | 54 | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ) { |
Rohit Grover |
118:620d28e7a1ba | 55 | |
Rohit Grover |
118:620d28e7a1ba | 56 | GattCharacteristic *hrmChars[] = {&tempMeasurement, &tempLocation, }; |
Rohit Grover |
118:620d28e7a1ba | 57 | GattService hrmService(GattService::UUID_HEALTH_THERMOMETER_SERVICE, hrmChars, sizeof(hrmChars) / sizeof(GattCharacteristic *)); |
Rohit Grover |
118:620d28e7a1ba | 58 | |
Rohit Grover |
118:620d28e7a1ba | 59 | ble.addService(hrmService); |
Rohit Grover |
118:620d28e7a1ba | 60 | } |
Rohit Grover |
118:620d28e7a1ba | 61 | |
Rohit Grover |
118:620d28e7a1ba | 62 | void updateTemperature(float temperature) { |
Rohit Grover |
118:620d28e7a1ba | 63 | if (ble.getGapState().connected) { |
Rohit Grover |
118:620d28e7a1ba | 64 | valueBytes.updateTemperature(temperature); |
Rohit Grover |
118:620d28e7a1ba | 65 | ble.updateCharacteristicValue(tempMeasurement.getValueAttribute().getHandle(), valueBytes.getPointer(), sizeof(TemperatureValueBytes)); |
Rohit Grover |
118:620d28e7a1ba | 66 | } |
Rohit Grover |
118:620d28e7a1ba | 67 | } |
Rohit Grover |
118:620d28e7a1ba | 68 | |
Rohit Grover |
118:620d28e7a1ba | 69 | private: |
Rohit Grover |
118:620d28e7a1ba | 70 | /* Private internal representation for the bytes used to work with the vaulue of the heart-rate characteristic. */ |
Rohit Grover |
118:620d28e7a1ba | 71 | struct TemperatureValueBytes { |
Rohit Grover |
118:620d28e7a1ba | 72 | static const unsigned OFFSET_OF_FLAGS = 0; |
Rohit Grover |
118:620d28e7a1ba | 73 | static const unsigned OFFSET_OF_VALUE = OFFSET_OF_FLAGS + sizeof(uint8_t); |
Rohit Grover |
118:620d28e7a1ba | 74 | static const unsigned SIZEOF_VALUE_BYTES = sizeof(uint8_t) + sizeof(float); |
Rohit Grover |
118:620d28e7a1ba | 75 | |
Rohit Grover |
118:620d28e7a1ba | 76 | static const unsigned TEMPERATURE_UNITS_FLAG_POS = 0; |
Rohit Grover |
118:620d28e7a1ba | 77 | static const unsigned TIMESTAMP_FLAG_POS = 1; |
Rohit Grover |
118:620d28e7a1ba | 78 | static const unsigned TEMPERATURE_TYPE_FLAG_POS = 2; |
Rohit Grover |
118:620d28e7a1ba | 79 | |
Rohit Grover |
118:620d28e7a1ba | 80 | static const uint8_t TEMPERATURE_UNITS_CELSIUS = 0; |
Rohit Grover |
118:620d28e7a1ba | 81 | static const uint8_t TEMPERATURE_UNITS_FAHRENHEIT = 1; |
Rohit Grover |
118:620d28e7a1ba | 82 | |
Rohit Grover |
118:620d28e7a1ba | 83 | TemperatureValueBytes(float initialTemperature) : bytes() { |
Rohit Grover |
118:620d28e7a1ba | 84 | /* assumption: temperature values are expressed in Celsius */ |
Rohit Grover |
118:620d28e7a1ba | 85 | bytes[OFFSET_OF_FLAGS] = (TEMPERATURE_UNITS_CELSIUS << TEMPERATURE_UNITS_FLAG_POS) | |
Rohit Grover |
118:620d28e7a1ba | 86 | (false << TIMESTAMP_FLAG_POS) | |
Rohit Grover |
118:620d28e7a1ba | 87 | (false << TEMPERATURE_TYPE_FLAG_POS); |
Rohit Grover |
118:620d28e7a1ba | 88 | updateTemperature(initialTemperature); |
Rohit Grover |
118:620d28e7a1ba | 89 | } |
Rohit Grover |
118:620d28e7a1ba | 90 | |
Rohit Grover |
118:620d28e7a1ba | 91 | void updateTemperature(float temp) { |
Rohit Grover |
118:620d28e7a1ba | 92 | uint32_t temp_ieee11073 = quick_ieee11073_from_float(temp); |
Rohit Grover |
118:620d28e7a1ba | 93 | memcpy(&bytes[OFFSET_OF_VALUE], &temp_ieee11073, sizeof(float)); |
Rohit Grover |
118:620d28e7a1ba | 94 | } |
Rohit Grover |
118:620d28e7a1ba | 95 | |
Rohit Grover |
118:620d28e7a1ba | 96 | uint8_t *getPointer(void) { |
Rohit Grover |
118:620d28e7a1ba | 97 | return bytes; |
Rohit Grover |
118:620d28e7a1ba | 98 | } |
Rohit Grover |
118:620d28e7a1ba | 99 | |
Rohit Grover |
118:620d28e7a1ba | 100 | const uint8_t *getPointer(void) const { |
Rohit Grover |
118:620d28e7a1ba | 101 | return bytes; |
Rohit Grover |
118:620d28e7a1ba | 102 | } |
Rohit Grover |
118:620d28e7a1ba | 103 | |
Rohit Grover |
118:620d28e7a1ba | 104 | private: |
Rohit Grover |
118:620d28e7a1ba | 105 | /** |
Rohit Grover |
118:620d28e7a1ba | 106 | * @brief A very quick conversion between a float temperature and 11073-20601 FLOAT-Type. |
Rohit Grover |
118:620d28e7a1ba | 107 | * @param temperature The temperature as a float. |
Rohit Grover |
118:620d28e7a1ba | 108 | * @return The temperature in 11073-20601 FLOAT-Type format. |
Rohit Grover |
118:620d28e7a1ba | 109 | */ |
Rohit Grover |
118:620d28e7a1ba | 110 | uint32_t quick_ieee11073_from_float(float temperature) { |
Rohit Grover |
118:620d28e7a1ba | 111 | uint8_t exponent = 0xFE; //exponent is -2 |
Rohit Grover |
118:620d28e7a1ba | 112 | uint32_t mantissa = (uint32_t)(temperature * 100); |
Rohit Grover |
118:620d28e7a1ba | 113 | |
Rohit Grover |
118:620d28e7a1ba | 114 | return (((uint32_t)exponent) << 24) | mantissa; |
Rohit Grover |
118:620d28e7a1ba | 115 | } |
Rohit Grover |
118:620d28e7a1ba | 116 | |
Rohit Grover |
118:620d28e7a1ba | 117 | |
Rohit Grover |
118:620d28e7a1ba | 118 | private: |
Rohit Grover |
118:620d28e7a1ba | 119 | /* First byte = 8-bit flags, Second field is a float holding the temperature value. */ |
Rohit Grover |
118:620d28e7a1ba | 120 | /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature_measurement.xml */ |
Rohit Grover |
118:620d28e7a1ba | 121 | uint8_t bytes[SIZEOF_VALUE_BYTES]; |
Rohit Grover |
118:620d28e7a1ba | 122 | }; |
Rohit Grover |
118:620d28e7a1ba | 123 | |
Rohit Grover |
118:620d28e7a1ba | 124 | private: |
Rohit Grover |
118:620d28e7a1ba | 125 | BLEDevice &ble; |
Rohit Grover |
118:620d28e7a1ba | 126 | TemperatureValueBytes valueBytes; |
Rohit Grover |
118:620d28e7a1ba | 127 | GattCharacteristic tempMeasurement; |
Rohit Grover |
118:620d28e7a1ba | 128 | GattCharacteristic tempLocation; |
Rohit Grover |
118:620d28e7a1ba | 129 | }; |
Rohit Grover |
118:620d28e7a1ba | 130 | |
Rohit Grover |
118:620d28e7a1ba | 131 | #endif /* #ifndef __BLE_HEALTH_THERMOMETER_SERVICE_H__*/ |