Ben Zhang / Mbed 2 deprecated BLE_API_DEMO

A simple demo that directly uses BLE library to define service and characteristics

Dependencies:   BLE_API mbed nRF51822

Fork of BLE_HeartRate by Bluetooth Low Energy

main.cpp@48:908b4ec086ba, 2014-10-22 (annotated)

Committer:
nebgnahz
Date:
Wed Oct 22 05:39:38 2014 +0000
Revision:
48:908b4ec086ba
Parent:
47:430545f41113
Child:
49:14b2df099dfc
a simple demo

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ktownsend 0:87a7fc231fae 1 #include "mbed.h"
Rohit Grover 10:2436164b692e 2 #include "BLEDevice.h"
ktownsend 0:87a7fc231fae 3
Rohit Grover 10:2436164b692e 4 BLEDevice ble;
rgrover1 47:430545f41113 5 DigitalOut led1(LED1);
ktownsend 0:87a7fc231fae 6
rgrover1 45:98c5a34b07a4 7 const static char DEVICE_NAME[] = "Nordic_HRM";
nebgnahz 48:908b4ec086ba 8 static const uint16_t uuid16_list[] = {0xFEDB};
nebgnahz 48:908b4ec086ba 9 static volatile bool is_button_pressed = false;
nebgnahz 48:908b4ec086ba 10 static volatile uint16_t led1_handler;
nebgnahz 48:908b4ec086ba 11
nebgnahz 48:908b4ec086ba 12 uint8_t led_state, button_state;
Rohit Grover 36:ea2a1b4f51c1 13
rgrover1 41:9cef0129da5f 14 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
ktownsend 0:87a7fc231fae 15 {
rgrover1 46:ee7c55907f36 16 ble.startAdvertising(); // restart advertising
rgrover1 7:daab8ba5139e 17 }
Rohit Grover 3:24e2b056d229 18
nebgnahz 48:908b4ec086ba 19 // eventDataP->charHandle is just uint16_t
nebgnahz 48:908b4ec086ba 20 void changeLED(const GattCharacteristicWriteCBParams *eventDataP) {
nebgnahz 48:908b4ec086ba 21 if (eventDataP->charHandle == led1_handler) {
nebgnahz 48:908b4ec086ba 22 led1 = eventDataP->data[0] % 2;
nebgnahz 48:908b4ec086ba 23 }
nebgnahz 48:908b4ec086ba 24 }
rgrover1 47:430545f41113 25
nebgnahz 48:908b4ec086ba 26 void button1Pressed() {
nebgnahz 48:908b4ec086ba 27 button_state = 1;
nebgnahz 48:908b4ec086ba 28 is_button_pressed = true;
nebgnahz 48:908b4ec086ba 29 }
nebgnahz 48:908b4ec086ba 30 void button2Pressed() {
nebgnahz 48:908b4ec086ba 31 button_state = 2;
nebgnahz 48:908b4ec086ba 32 is_button_pressed = true;
Rohit Grover 11:1d9aafee4984 33 }
Rohit Grover 11:1d9aafee4984 34
ktownsend 0:87a7fc231fae 35 int main(void)
ktownsend 0:87a7fc231fae 36 {
nebgnahz 48:908b4ec086ba 37 // button initialization
nebgnahz 48:908b4ec086ba 38 InterruptIn button1(BUTTON1);
nebgnahz 48:908b4ec086ba 39 InterruptIn button2(BUTTON2);
nebgnahz 48:908b4ec086ba 40 button1.mode(PullUp);
nebgnahz 48:908b4ec086ba 41 button2.mode(PullUp);
nebgnahz 48:908b4ec086ba 42 button1.rise(&button1Pressed);
nebgnahz 48:908b4ec086ba 43 button2.rise(&button2Pressed);
nebgnahz 48:908b4ec086ba 44 led1 = 0;
ktownsend 0:87a7fc231fae 45
nebgnahz 48:908b4ec086ba 46 // just a simple service example
nebgnahz 48:908b4ec086ba 47 // o led1 characteristics, you can write from the phone to control led1
nebgnahz 48:908b4ec086ba 48 // o button characteristics, you can read and get notified
nebgnahz 48:908b4ec086ba 49 GattCharacteristic led1_characteristics(
nebgnahz 48:908b4ec086ba 50 0xFF00, &led_state, sizeof(led_state), sizeof(led_state),
nebgnahz 48:908b4ec086ba 51 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ |
nebgnahz 48:908b4ec086ba 52 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE);
nebgnahz 48:908b4ec086ba 53 led1_handler = led1_characteristics.getValueAttribute().getHandle();
rgrover1 45:98c5a34b07a4 54
nebgnahz 48:908b4ec086ba 55 GattCharacteristic button_characteristics(
nebgnahz 48:908b4ec086ba 56 0xFF01, &button_state, sizeof(button_state), sizeof(button_state),
nebgnahz 48:908b4ec086ba 57 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ |
nebgnahz 48:908b4ec086ba 58 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
nebgnahz 48:908b4ec086ba 59
nebgnahz 48:908b4ec086ba 60 GattCharacteristic *charTable[] = {&led1_characteristics, &button_characteristics};
nebgnahz 48:908b4ec086ba 61 GattService testService(0xFFFF, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
nebgnahz 48:908b4ec086ba 62
nebgnahz 48:908b4ec086ba 63 // BLE setup, mainly we add service and callbacks
nebgnahz 48:908b4ec086ba 64 ble.init();
nebgnahz 48:908b4ec086ba 65 ble.addService(testService);
nebgnahz 48:908b4ec086ba 66 ble.onDataWritten(&changeLED);
nebgnahz 48:908b4ec086ba 67 ble.onDisconnection(disconnectionCallback);
nebgnahz 48:908b4ec086ba 68
nebgnahz 48:908b4ec086ba 69 // setup advertising
Rohit Grover 29:76d865c718a6 70 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
rgrover1 40:e73130c6f2bb 71 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
Rohit Grover 29:76d865c718a6 72 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
rgrover1 7:daab8ba5139e 73 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
rgrover1 40:e73130c6f2bb 74 ble.setAdvertisingInterval(1600); /* 1000ms; in multiples of 0.625ms. */
rgrover1 7:daab8ba5139e 75 ble.startAdvertising();
Rohit Grover 3:24e2b056d229 76
Rohit Grover 11:1d9aafee4984 77 while (true) {
nebgnahz 48:908b4ec086ba 78 if (is_button_pressed) {
nebgnahz 48:908b4ec086ba 79 is_button_pressed = false;
nebgnahz 48:908b4ec086ba 80 ble.updateCharacteristicValue(button_characteristics.getValueAttribute().getHandle(),
nebgnahz 48:908b4ec086ba 81 &button_state, sizeof(button_state));
Rohit Grover 36:ea2a1b4f51c1 82 } else {
Rohit Grover 36:ea2a1b4f51c1 83 ble.waitForEvent();
Rohit Grover 36:ea2a1b4f51c1 84 }
ktownsend 0:87a7fc231fae 85 }
ktownsend 0:87a7fc231fae 86 }