Inderpreet Singh / Mbed 2 deprecated BLE_GATT_BBC_microbit_nrf

Basic Working Code

Dependencies:   BLE_API mbed nRF51822

Fork of BLE_GATT_Example by Bluetooth Low Energy

main.cpp@23:1872b009ccd0, 2017-03-08 (annotated)

Committer:
ipv1
Date:
Wed Mar 08 19:56:24 2017 +0000
Revision:
23:1872b009ccd0
Parent:
22:406127954d1f 
working simple code;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbedAustin 0:cd5b6733aeb1 1 #include "mbed.h"
andresag 19:477567297aac 2 #include "ble/BLE.h"
mbedAustin 1:94152e7d8b5c 3
ipv1 23:1872b009ccd0 4 DigitalOut col0(P0_7, 0);
ipv1 23:1872b009ccd0 5
ipv1 23:1872b009ccd0 6 DigitalOut led(P0_14, 1);
mbedAustin 9:b33f42191584 7 uint16_t customServiceUUID = 0xA000;
mbedAustin 13:62b1d32745ac 8 uint16_t readCharUUID = 0xA001;
mbedAustin 9:b33f42191584 9 uint16_t writeCharUUID = 0xA002;
mbedAustin 1:94152e7d8b5c 10
mbedAustin 7:f6814152873c 11 const static char DEVICE_NAME[] = "ChangeMe!!"; // change this
mbedAustin 8:60ede963dfe2 12 static const uint16_t uuid16_list[] = {0xFFFF}; //Custom UUID, FFFF is reserved for development
mbedAustin 1:94152e7d8b5c 13
andresag 22:406127954d1f 14 /* Set Up custom Characteristics */
mbedAustin 9:b33f42191584 15 static uint8_t readValue[10] = {0};
mbedAustin 12:6d1f77d0cb37 16 ReadOnlyArrayGattCharacteristic<uint8_t, sizeof(readValue)> readChar(readCharUUID, readValue);
mbedAustin 2:e84c13abc479 17
mbedAustin 9:b33f42191584 18 static uint8_t writeValue[10] = {0};
mbedAustin 12:6d1f77d0cb37 19 WriteOnlyArrayGattCharacteristic<uint8_t, sizeof(writeValue)> writeChar(writeCharUUID, writeValue);
mbedAustin 2:e84c13abc479 20
andresag 22:406127954d1f 21 /* Set up custom service */
mbedAustin 8:60ede963dfe2 22 GattCharacteristic *characteristics[] = {&readChar, &writeChar};
mbedAustin 9:b33f42191584 23 GattService customService(customServiceUUID, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *));
mbedAustin 2:e84c13abc479 24
mbedAustin 2:e84c13abc479 25
mbedAustin 8:60ede963dfe2 26 /*
mbedAustin 8:60ede963dfe2 27 * Restart advertising when phone app disconnects
andresag 19:477567297aac 28 */
andresag 19:477567297aac 29 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *)
mbedAustin 1:94152e7d8b5c 30 {
andresag 22:406127954d1f 31 BLE::Instance(BLE::DEFAULT_INSTANCE).gap().startAdvertising();
mbedAustin 1:94152e7d8b5c 32 }
mbedAustin 0:cd5b6733aeb1 33
andresag 19:477567297aac 34 /*
andresag 22:406127954d1f 35 * Handle writes to writeCharacteristic
mbedAustin 8:60ede963dfe2 36 */
melmon 18:7d89c4fba362 37 void writeCharCallback(const GattWriteCallbackParams *params)
mbedAustin 3:0fb60f81f693 38 {
andresag 22:406127954d1f 39 /* Check to see what characteristic was written, by handle */
melmon 18:7d89c4fba362 40 if(params->handle == writeChar.getValueHandle()) {
andresag 22:406127954d1f 41 /* toggle LED if only 1 byte is written */
mbedAustin 8:60ede963dfe2 42 if(params->len == 1) {
ipv1 23:1872b009ccd0 43 //led = params->data[0];
ipv1 23:1872b009ccd0 44 led=!led;
andresag 19:477567297aac 45 (params->data[0] == 0x00) ? printf("led on\n\r") : printf("led off\n\r"); // print led toggle
mbedAustin 8:60ede963dfe2 46 }
andresag 22:406127954d1f 47 /* Print the data if more than 1 byte is written */
mbedAustin 8:60ede963dfe2 48 else {
andresag 19:477567297aac 49 printf("Data received: length = %d, data = 0x",params->len);
mbedAustin 8:60ede963dfe2 50 for(int x=0; x < params->len; x++) {
andresag 19:477567297aac 51 printf("%x", params->data[x]);
mbedAustin 8:60ede963dfe2 52 }
andresag 19:477567297aac 53 printf("\n\r");
mbedAustin 8:60ede963dfe2 54 }
andresag 22:406127954d1f 55 /* Update the readChar with the value of writeChar */
andresag 22:406127954d1f 56 BLE::Instance(BLE::DEFAULT_INSTANCE).gattServer().write(readChar.getValueHandle(), params->data, params->len);
mbedAustin 8:60ede963dfe2 57 }
mbedAustin 3:0fb60f81f693 58 }
andresag 22:406127954d1f 59 /*
andresag 22:406127954d1f 60 * Initialization callback
andresag 22:406127954d1f 61 */
andresag 22:406127954d1f 62 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
andresag 22:406127954d1f 63 {
andresag 22:406127954d1f 64 BLE &ble = params->ble;
andresag 22:406127954d1f 65 ble_error_t error = params->error;
andresag 22:406127954d1f 66
andresag 22:406127954d1f 67 if (error != BLE_ERROR_NONE) {
andresag 22:406127954d1f 68 return;
andresag 22:406127954d1f 69 }
mbedAustin 0:cd5b6733aeb1 70
andresag 19:477567297aac 71 ble.gap().onDisconnection(disconnectionCallback);
andresag 19:477567297aac 72 ble.gattServer().onDataWritten(writeCharCallback);
mbedAustin 2:e84c13abc479 73
andresag 22:406127954d1f 74 /* Setup advertising */
andresag 19:477567297aac 75 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); // BLE only, no classic BT
andresag 19:477567297aac 76 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); // advertising type
andresag 19:477567297aac 77 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); // add name
andresag 19:477567297aac 78 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); // UUID's broadcast in advertising packet
andresag 19:477567297aac 79 ble.gap().setAdvertisingInterval(100); // 100ms.
mbedAustin 2:e84c13abc479 80
andresag 22:406127954d1f 81 /* Add our custom service */
mbedAustin 13:62b1d32745ac 82 ble.addService(customService);
mbedAustin 2:e84c13abc479 83
andresag 22:406127954d1f 84 /* Start advertising */
andresag 19:477567297aac 85 ble.gap().startAdvertising();
andresag 22:406127954d1f 86 }
andresag 19:477567297aac 87
andresag 22:406127954d1f 88 /*
andresag 22:406127954d1f 89 * Main loop
andresag 22:406127954d1f 90 */
andresag 22:406127954d1f 91 int main(void)
andresag 22:406127954d1f 92 {
andresag 22:406127954d1f 93 /* initialize stuff */
andresag 22:406127954d1f 94 printf("\n\r********* Starting Main Loop *********\n\r");
andresag 22:406127954d1f 95
andresag 22:406127954d1f 96 BLE& ble = BLE::Instance(BLE::DEFAULT_INSTANCE);
andresag 22:406127954d1f 97 ble.init(bleInitComplete);
andresag 22:406127954d1f 98
andresag 22:406127954d1f 99 /* SpinWait for initialization to complete. This is necessary because the
andresag 22:406127954d1f 100 * BLE object is used in the main loop below. */
andresag 22:406127954d1f 101 while (ble.hasInitialized() == false) { /* spin loop */ }
andresag 22:406127954d1f 102
andresag 22:406127954d1f 103 /* Infinite loop waiting for BLE interrupt events */
mbedAustin 2:e84c13abc479 104 while (true) {
andresag 22:406127954d1f 105 ble.waitForEvent(); /* Save power */
mbedAustin 2:e84c13abc479 106 }
andresag 20:fcc752d401ec 107 }