Basic Working Code
Dependencies: BLE_API mbed nRF51822
Fork of BLE_GATT_Example by
main.cpp@19:477567297aac, 2015-10-20 (annotated)
- Committer:
- andresag
- Date:
- Tue Oct 20 13:41:38 2015 +0000
- Revision:
- 19:477567297aac
- Parent:
- 17:32973972d2dd
- Child:
- 20:fcc752d401ec
Updated BLE and mbed dependencies, also modified demo code to comply with changes to the API.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbedAustin | 0:cd5b6733aeb1 | 1 | #include "mbed.h" |
andresag | 19:477567297aac | 2 | #include "ble/BLE.h" |
mbedAustin | 1:94152e7d8b5c | 3 | |
andresag | 19:477567297aac | 4 | BLE ble; |
andresag | 19:477567297aac | 5 | DigitalOut led(LED1, 1); |
mbedAustin | 9:b33f42191584 | 6 | uint16_t customServiceUUID = 0xA000; |
mbedAustin | 13:62b1d32745ac | 7 | uint16_t readCharUUID = 0xA001; |
mbedAustin | 9:b33f42191584 | 8 | uint16_t writeCharUUID = 0xA002; |
mbedAustin | 1:94152e7d8b5c | 9 | |
mbedAustin | 7:f6814152873c | 10 | const static char DEVICE_NAME[] = "ChangeMe!!"; // change this |
mbedAustin | 8:60ede963dfe2 | 11 | static const uint16_t uuid16_list[] = {0xFFFF}; //Custom UUID, FFFF is reserved for development |
mbedAustin | 1:94152e7d8b5c | 12 | |
mbedAustin | 10:6acaa9f0ef85 | 13 | // Set Up custom Characteristics |
mbedAustin | 9:b33f42191584 | 14 | static uint8_t readValue[10] = {0}; |
mbedAustin | 12:6d1f77d0cb37 | 15 | ReadOnlyArrayGattCharacteristic<uint8_t, sizeof(readValue)> readChar(readCharUUID, readValue); |
mbedAustin | 2:e84c13abc479 | 16 | |
mbedAustin | 9:b33f42191584 | 17 | static uint8_t writeValue[10] = {0}; |
mbedAustin | 12:6d1f77d0cb37 | 18 | WriteOnlyArrayGattCharacteristic<uint8_t, sizeof(writeValue)> writeChar(writeCharUUID, writeValue); |
mbedAustin | 2:e84c13abc479 | 19 | |
mbedAustin | 2:e84c13abc479 | 20 | // Set up custom service |
mbedAustin | 8:60ede963dfe2 | 21 | GattCharacteristic *characteristics[] = {&readChar, &writeChar}; |
mbedAustin | 9:b33f42191584 | 22 | GattService customService(customServiceUUID, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *)); |
mbedAustin | 2:e84c13abc479 | 23 | |
mbedAustin | 2:e84c13abc479 | 24 | |
mbedAustin | 8:60ede963dfe2 | 25 | /* |
mbedAustin | 8:60ede963dfe2 | 26 | * Restart advertising when phone app disconnects |
andresag | 19:477567297aac | 27 | */ |
andresag | 19:477567297aac | 28 | void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *) |
mbedAustin | 1:94152e7d8b5c | 29 | { |
andresag | 19:477567297aac | 30 | ble.gap().startAdvertising(); |
mbedAustin | 1:94152e7d8b5c | 31 | } |
mbedAustin | 0:cd5b6733aeb1 | 32 | |
andresag | 19:477567297aac | 33 | /* |
mbedAustin | 8:60ede963dfe2 | 34 | * handle writes to writeCharacteristic |
mbedAustin | 8:60ede963dfe2 | 35 | */ |
andresag | 19:477567297aac | 36 | void writeCharCallback(const GattWriteCallbackParams *params) |
mbedAustin | 3:0fb60f81f693 | 37 | { |
mbedAustin | 8:60ede963dfe2 | 38 | // check to see what characteristic was written, by handle |
andresag | 19:477567297aac | 39 | if(params->handle == writeChar.getValueHandle()) { |
mbedAustin | 8:60ede963dfe2 | 40 | // toggle LED if only 1 byte is written |
mbedAustin | 8:60ede963dfe2 | 41 | if(params->len == 1) { |
mbedAustin | 8:60ede963dfe2 | 42 | led = params->data[0]; |
andresag | 19:477567297aac | 43 | (params->data[0] == 0x00) ? printf("led on\n\r") : printf("led off\n\r"); // print led toggle |
mbedAustin | 8:60ede963dfe2 | 44 | } |
mbedAustin | 8:60ede963dfe2 | 45 | // print the data if more than 1 byte is written |
mbedAustin | 8:60ede963dfe2 | 46 | else { |
andresag | 19:477567297aac | 47 | printf("Data received: length = %d, data = 0x",params->len); |
mbedAustin | 8:60ede963dfe2 | 48 | for(int x=0; x < params->len; x++) { |
andresag | 19:477567297aac | 49 | printf("%x", params->data[x]); |
mbedAustin | 8:60ede963dfe2 | 50 | } |
andresag | 19:477567297aac | 51 | printf("\n\r"); |
mbedAustin | 8:60ede963dfe2 | 52 | } |
mbedAustin | 8:60ede963dfe2 | 53 | // update the readChar with the value of writeChar |
andresag | 19:477567297aac | 54 | ble.updateCharacteristicValue(readChar.getValueHandle(), params->data,params->len); |
mbedAustin | 8:60ede963dfe2 | 55 | } |
mbedAustin | 3:0fb60f81f693 | 56 | } |
mbedAustin | 0:cd5b6733aeb1 | 57 | |
mbedAustin | 8:60ede963dfe2 | 58 | /* |
mbedAustin | 8:60ede963dfe2 | 59 | * main loop |
andresag | 19:477567297aac | 60 | */ |
mbedAustin | 0:cd5b6733aeb1 | 61 | int |
mbedAustin | 0:cd5b6733aeb1 | 62 | main(void) |
mbedAustin | 0:cd5b6733aeb1 | 63 | { |
mbedAustin | 8:60ede963dfe2 | 64 | /* initialize stuff */ |
mbedAustin | 8:60ede963dfe2 | 65 | printf("\n\r********* Starting Main Loop *********\n\r"); |
mbedAustin | 2:e84c13abc479 | 66 | ble.init(); |
andresag | 19:477567297aac | 67 | ble.gap().onDisconnection(disconnectionCallback); |
andresag | 19:477567297aac | 68 | ble.gattServer().onDataWritten(writeCharCallback); |
mbedAustin | 2:e84c13abc479 | 69 | |
mbedAustin | 2:e84c13abc479 | 70 | /* setup advertising */ |
andresag | 19:477567297aac | 71 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); // BLE only, no classic BT |
andresag | 19:477567297aac | 72 | ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); // advertising type |
andresag | 19:477567297aac | 73 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); // add name |
andresag | 19:477567297aac | 74 | 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 | 75 | ble.gap().setAdvertisingInterval(100); // 100ms. |
mbedAustin | 2:e84c13abc479 | 76 | |
mbedAustin | 8:60ede963dfe2 | 77 | // add our custom service |
mbedAustin | 13:62b1d32745ac | 78 | ble.addService(customService); |
mbedAustin | 2:e84c13abc479 | 79 | |
mbedAustin | 13:62b1d32745ac | 80 | // start advertising |
andresag | 19:477567297aac | 81 | ble.gap().startAdvertising(); |
andresag | 19:477567297aac | 82 | |
mbedAustin | 9:b33f42191584 | 83 | // infinite loop waiting for BLE interrupt events |
mbedAustin | 2:e84c13abc479 | 84 | while (true) { |
mbedAustin | 2:e84c13abc479 | 85 | ble.waitForEvent(); //Save power |
mbedAustin | 2:e84c13abc479 | 86 | } |
mbedAustin | 8:60ede963dfe2 | 87 | } |