Wang Xinglu / BLE_API

High level Bluetooth Low Energy API and radio abstraction layer

Dependencies:   nRF51822

Dependents:   LinkNode_LIS3DH

Fork of BLE_API by Bluetooth Low Energy

main.cpp@9:124ae067ae27, 2013-12-16 (annotated)

Committer:
ktownsend
Date:
Mon Dec 16 19:43:33 2013 +0000
Revision:
9:124ae067ae27
Parent:
7:5e1f0d7f7c7d
Child:
11:200931be5617
Preview code enabling most advertising features (requires new nRF51 firmware)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ktownsend 0:ace2e8d3ce79 1 #include "mbed.h"
ktownsend 0:ace2e8d3ce79 2
ktownsend 0:ace2e8d3ce79 3 #include "uuid.h"
ktownsend 2:ffc5216bd2cc 4 #include "GattService.h"
ktownsend 2:ffc5216bd2cc 5 #include "GattCharacteristic.h"
ktownsend 0:ace2e8d3ce79 6 #include "hw/nrf51822.h"
ktownsend 0:ace2e8d3ce79 7
ktownsend 0:ace2e8d3ce79 8 DigitalOut myled ( LED1 );
ktownsend 0:ace2e8d3ce79 9
ktownsend 0:ace2e8d3ce79 10 /* Radio HW abstraction layer */
ktownsend 0:ace2e8d3ce79 11 nRF51822 radio;
ktownsend 0:ace2e8d3ce79 12
ktownsend 0:ace2e8d3ce79 13 /* Battery Level Service */
ktownsend 0:ace2e8d3ce79 14 /* See --> https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.battery_service.xml */
ktownsend 2:ffc5216bd2cc 15 GattService battService ( 0x180F );
ktownsend 3:46de446e82ed 16 GattCharacteristic battLevel ( 0x2A19, 1, 1, BLE_GATT_CHAR_PROPERTIES_NOTIFY | BLE_GATT_CHAR_PROPERTIES_READ );
ktownsend 0:ace2e8d3ce79 17
ktownsend 0:ace2e8d3ce79 18 /* Heart Rate Monitor Service */
ktownsend 0:ace2e8d3ce79 19 /* See --> https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.heart_rate.xml */
ktownsend 2:ffc5216bd2cc 20 GattService hrmService ( 0x180D );
ktownsend 3:46de446e82ed 21 GattCharacteristic hrmRate ( 0x2A37, 2, 3, BLE_GATT_CHAR_PROPERTIES_NOTIFY );
ktownsend 3:46de446e82ed 22 GattCharacteristic hrmLocation ( 0x2A39, 1, 1, BLE_GATT_CHAR_PROPERTIES_READ );
ktownsend 0:ace2e8d3ce79 23
ktownsend 0:ace2e8d3ce79 24 /* Health Thermometer Service */
ktownsend 0:ace2e8d3ce79 25 /* See --> https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.health_thermometer.xml */
ktownsend 2:ffc5216bd2cc 26 GattService thermService ( 0x1809 );
ktownsend 3:46de446e82ed 27 GattCharacteristic thermTemp ( 0x2A1C, 5, 13, BLE_GATT_CHAR_PROPERTIES_INDICATE );
ktownsend 3:46de446e82ed 28 GattCharacteristic thermType ( 0x2A1D, 1, 1, BLE_GATT_CHAR_PROPERTIES_READ );
ktownsend 3:46de446e82ed 29 GattCharacteristic thermInterval ( 0x2A21, 2, 2, BLE_GATT_CHAR_PROPERTIES_READ );
ktownsend 0:ace2e8d3ce79 30
ktownsend 0:ace2e8d3ce79 31 /* Notify = device (server) sends data when it changes */
ktownsend 5:7635f81a8e09 32 /* Indicate = device (server) sends data when it changes and client confirms reception */
ktownsend 5:7635f81a8e09 33
ktownsend 5:7635f81a8e09 34 /* GAP Advertising Example (iBeacon) */
ktownsend 6:425638944835 35 GapAdvertisingParams advParams ( GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED );
ktownsend 5:7635f81a8e09 36 GapAdvertisingData advData;
ktownsend 7:5e1f0d7f7c7d 37 GapAdvertisingData scanResponse;
ktownsend 5:7635f81a8e09 38
ktownsend 5:7635f81a8e09 39 uint8_t iBeaconPayload[25] = { 0x4C, 0x00, 0x02, 0x15, 0xE2, 0x0A, 0x39, 0xF4, 0x73, 0xF5, 0x4B, 0xC4, 0xA1, 0x2F, 0x17, 0xD1, 0xAD, 0x07, 0xA9, 0x61, 0x00, 0x00, 0x00, 0x00, 0xC8 };
ktownsend 5:7635f81a8e09 40
ktownsend 5:7635f81a8e09 41 void startBeacon(void)
ktownsend 5:7635f81a8e09 42 {
ktownsend 5:7635f81a8e09 43 /* iBeacon includes the FLAG and MSD fields */
ktownsend 5:7635f81a8e09 44 advData.addFlags(GapAdvertisingData::BREDR_NOT_SUPPORTED);
ktownsend 5:7635f81a8e09 45 advData.addData(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, iBeaconPayload, 25);
ktownsend 5:7635f81a8e09 46
ktownsend 5:7635f81a8e09 47 wait(2);
ktownsend 5:7635f81a8e09 48 radio.reset();
ktownsend 7:5e1f0d7f7c7d 49 radio.setAdvertising(advParams, advData, scanResponse);
ktownsend 5:7635f81a8e09 50 radio.start();
ktownsend 5:7635f81a8e09 51 }
ktownsend 5:7635f81a8e09 52
ktownsend 0:ace2e8d3ce79 53 int main()
ktownsend 0:ace2e8d3ce79 54 {
ktownsend 3:46de446e82ed 55 wait(2);
ktownsend 5:7635f81a8e09 56 startBeacon();
ktownsend 2:ffc5216bd2cc 57 while(1);
ktownsend 2:ffc5216bd2cc 58
ktownsend 0:ace2e8d3ce79 59 /* Add the battery level characteristic to the battery service */
ktownsend 0:ace2e8d3ce79 60 /* Note: This will also update the characteristic's .index field */
ktownsend 0:ace2e8d3ce79 61 /* so that we know where it's stored in the BLEService.characteristics */
ktownsend 0:ace2e8d3ce79 62 /* array. */
ktownsend 0:ace2e8d3ce79 63 battService.addCharacteristic(battLevel);
ktownsend 0:ace2e8d3ce79 64
ktownsend 0:ace2e8d3ce79 65 /* Add the heart rate and sensor location chars to the HRM service */
ktownsend 0:ace2e8d3ce79 66 hrmService.addCharacteristic(hrmRate);
ktownsend 0:ace2e8d3ce79 67 hrmService.addCharacteristic(hrmLocation);
ktownsend 0:ace2e8d3ce79 68
ktownsend 0:ace2e8d3ce79 69 /* Add the Health Thermometer server characteristics */
ktownsend 0:ace2e8d3ce79 70 thermService.addCharacteristic(thermTemp);
ktownsend 0:ace2e8d3ce79 71 thermService.addCharacteristic(thermType);
ktownsend 0:ace2e8d3ce79 72 thermService.addCharacteristic(thermInterval);
ktownsend 0:ace2e8d3ce79 73
ktownsend 0:ace2e8d3ce79 74 /* Reset the BLE hardware to make sure we get a clean start */
ktownsend 0:ace2e8d3ce79 75 wait(2);
ktownsend 0:ace2e8d3ce79 76 radio.reset();
ktownsend 0:ace2e8d3ce79 77
ktownsend 0:ace2e8d3ce79 78 /* Add the services to the radio HAL */
ktownsend 0:ace2e8d3ce79 79 radio.addService(battService);
ktownsend 0:ace2e8d3ce79 80 radio.addService(hrmService);
ktownsend 0:ace2e8d3ce79 81 radio.addService(thermService);
ktownsend 0:ace2e8d3ce79 82
ktownsend 0:ace2e8d3ce79 83 /* Start the services so that we can start pushing data out */
ktownsend 0:ace2e8d3ce79 84 radio.start();
ktownsend 0:ace2e8d3ce79 85
ktownsend 0:ace2e8d3ce79 86 /* Set the heart rate monitor location (one time only) */
ktownsend 0:ace2e8d3ce79 87 /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.body_sensor_location.xml */
ktownsend 0:ace2e8d3ce79 88 uint8_t location = 0x01; /* Chest */
ktownsend 2:ffc5216bd2cc 89 radio.writeCharacteristic(hrmService, hrmLocation, (uint8_t*)&location, sizeof(location));
ktownsend 0:ace2e8d3ce79 90
ktownsend 0:ace2e8d3ce79 91 /* Update the battery level */
ktownsend 0:ace2e8d3ce79 92 /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.battery_level.xml */
ktownsend 0:ace2e8d3ce79 93 uint8_t batt = 72; /* Percentage (0..100) */
ktownsend 2:ffc5216bd2cc 94 radio.writeCharacteristic(battService, battLevel, (uint8_t*)&batt, sizeof(batt));
ktownsend 0:ace2e8d3ce79 95
ktownsend 0:ace2e8d3ce79 96 /* Update the fixed health thermometer characteristics */
ktownsend 0:ace2e8d3ce79 97 /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature_type.xml */
ktownsend 0:ace2e8d3ce79 98 uint8_t thermLocation = 6; /* Location = mouth */
ktownsend 2:ffc5216bd2cc 99 radio.writeCharacteristic(thermService, thermType, (uint8_t*)&thermLocation, sizeof(thermLocation));
ktownsend 0:ace2e8d3ce79 100 /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.measurement_interval.xml */
ktownsend 0:ace2e8d3ce79 101 uint16_t thermDelay = 5;
ktownsend 2:ffc5216bd2cc 102 radio.writeCharacteristic(thermService, thermInterval, (uint8_t*)&thermDelay, sizeof(thermDelay));
ktownsend 0:ace2e8d3ce79 103
ktownsend 0:ace2e8d3ce79 104 /* Blinky + value updates */
ktownsend 0:ace2e8d3ce79 105 uint8_t hrmCounter = 100;
ktownsend 0:ace2e8d3ce79 106
ktownsend 0:ace2e8d3ce79 107 while(1)
ktownsend 0:ace2e8d3ce79 108 {
ktownsend 0:ace2e8d3ce79 109 myled = 1;
ktownsend 0:ace2e8d3ce79 110 wait(0.1);
ktownsend 0:ace2e8d3ce79 111 myled = 0;
ktownsend 0:ace2e8d3ce79 112 wait(0.1);
ktownsend 0:ace2e8d3ce79 113
ktownsend 0:ace2e8d3ce79 114 /* Update the HRM measurement */
ktownsend 0:ace2e8d3ce79 115 /* First byte = 8-bit values, no extra info, Second byte = uint8_t HRM value */
ktownsend 0:ace2e8d3ce79 116 /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */
ktownsend 0:ace2e8d3ce79 117 hrmCounter++;
ktownsend 0:ace2e8d3ce79 118 if (hrmCounter == 175) hrmCounter = 100;
ktownsend 0:ace2e8d3ce79 119 uint8_t bpm[2] = { 0x00, hrmCounter };
ktownsend 2:ffc5216bd2cc 120 radio.writeCharacteristic(hrmService, hrmRate, bpm, 2);
ktownsend 0:ace2e8d3ce79 121
ktownsend 0:ace2e8d3ce79 122 /* Update the Health Thermometer measurement */
ktownsend 0:ace2e8d3ce79 123
ktownsend 0:ace2e8d3ce79 124 // NOTE: This is an IEEE-11073 32-bit float NOT a IEEE-754 float (standard single precision float type) !!!
ktownsend 0:ace2e8d3ce79 125 // See: Section 2.2 of https://www.bluetooth.org/docman/handlers/downloaddoc.ashx?doc_id=242961
ktownsend 0:ace2e8d3ce79 126 // Example:
ktownsend 0:ace2e8d3ce79 127 // Consider a temperature measurement of 36.4 degrees Celsius with precision of 0.1 degrees Celsius.
ktownsend 0:ace2e8d3ce79 128 // The FLOAT-Type representation is a 32-bit value consisting of an exponent of an 8-bit signed integer
ktownsend 0:ace2e8d3ce79 129 // followed by a mantissa of a 24-bit signed integer; here, the exponent is -1 (0xFF) and the mantissa
ktownsend 0:ace2e8d3ce79 130 // is 364 (0x00016C). Therefore, the FLOAT-Type representation of 36.4 is 0xFF00016C.
ktownsend 0:ace2e8d3ce79 131
ktownsend 0:ace2e8d3ce79 132 uint8_t temperature[5] = { 0x00, 0x00, 0x00, 0x00, 0xFF };
ktownsend 0:ace2e8d3ce79 133 // Use the hrm counter to provide a shifting temperature value (175 = 17.5C, etc.)
ktownsend 0:ace2e8d3ce79 134 memcpy (temperature+1, &hrmCounter, 1);
ktownsend 2:ffc5216bd2cc 135 radio.writeCharacteristic(thermService, thermTemp, temperature, 5);
ktownsend 0:ace2e8d3ce79 136 }
ktownsend 0:ace2e8d3ce79 137 }